./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.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 fab3df42fb7f885fd39a281a051af0420a7d494ced4f3c2e06236facb6a7ec78 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-25 00:12:03,713 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 00:12:03,767 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 00:12:03,776 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 00:12:03,776 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 00:12:03,798 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 00:12:03,799 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 00:12:03,799 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 00:12:03,800 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 00:12:03,800 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 00:12:03,800 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 00:12:03,801 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 00:12:03,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 00:12:03,801 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 00:12:03,802 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 00:12:03,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 00:12:03,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 00:12:03,803 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 00:12:03,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 00:12:03,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 00:12:03,803 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 00:12:03,804 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 00:12:03,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 00:12:03,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 00:12:03,805 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 00:12:03,805 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 00:12:03,805 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 00:12:03,805 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 00:12:03,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 00:12:03,806 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 00:12:03,806 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 00:12:03,807 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 00:12:03,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:12:03,807 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 00:12:03,807 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 00:12:03,808 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 00:12:03,808 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 00:12:03,808 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 00:12:03,808 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 00:12:03,809 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 00:12:03,809 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 00:12:03,809 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 00:12:03,810 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab3df42fb7f885fd39a281a051af0420a7d494ced4f3c2e06236facb6a7ec78 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 00:12:04,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 00:12:04,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 00:12:04,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 00:12:04,051 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 00:12:04,051 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 00:12:04,052 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c [2024-09-25 00:12:05,359 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 00:12:05,507 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 00:12:05,507 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c [2024-09-25 00:12:05,513 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7813a7d40/5e1e1f6adb044502be983c58c64e6465/FLAG74ad36973 [2024-09-25 00:12:05,523 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7813a7d40/5e1e1f6adb044502be983c58c64e6465 [2024-09-25 00:12:05,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 00:12:05,526 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 00:12:05,527 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 00:12:05,527 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 00:12:05,532 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 00:12:05,533 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,534 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4acbe02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05, skipping insertion in model container [2024-09-25 00:12:05,534 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,552 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 00:12:05,692 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1474,1487] [2024-09-25 00:12:05,696 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1547,1560] [2024-09-25 00:12:05,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:12:05,711 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 00:12:05,726 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1474,1487] [2024-09-25 00:12:05,727 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1547,1560] [2024-09-25 00:12:05,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:12:05,747 INFO L204 MainTranslator]: Completed translation [2024-09-25 00:12:05,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05 WrapperNode [2024-09-25 00:12:05,747 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 00:12:05,748 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 00:12:05,748 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 00:12:05,748 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 00:12:05,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,759 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,765 INFO L138 Inliner]: procedures = 13, calls = 46, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 00:12:05,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 00:12:05,766 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 00:12:05,766 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 00:12:05,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 00:12:05,775 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,777 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,790 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 3, 4, 5, 4]. 28 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 1, 1, 1]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-09-25 00:12:05,791 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,791 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,816 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,817 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,818 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,819 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,821 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 00:12:05,823 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 00:12:05,823 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 00:12:05,823 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 00:12:05,823 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (1/1) ... [2024-09-25 00:12:05,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:12:05,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:05,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 00:12:05,862 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 00:12:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 00:12:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 00:12:05,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 00:12:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 00:12:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 00:12:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 00:12:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 00:12:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 00:12:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 00:12:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 00:12:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 00:12:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 00:12:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 00:12:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 00:12:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 00:12:05,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 00:12:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 00:12:05,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 00:12:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 00:12:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 00:12:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 00:12:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 00:12:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 00:12:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 00:12:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_15_0 [2024-09-25 00:12:05,917 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_15_0 [2024-09-25 00:12:05,990 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 00:12:05,993 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 00:12:06,143 INFO L? ?]: Removed 3 outVars from TransFormulas that were not future-live. [2024-09-25 00:12:06,143 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 00:12:06,161 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 00:12:06,164 INFO L317 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-25 00:12:06,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:12:06 BoogieIcfgContainer [2024-09-25 00:12:06,164 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 00:12:06,166 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 00:12:06,166 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 00:12:06,169 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 00:12:06,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:12:05" (1/3) ... [2024-09-25 00:12:06,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fede9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:12:06, skipping insertion in model container [2024-09-25 00:12:06,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:12:05" (2/3) ... [2024-09-25 00:12:06,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fede9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:12:06, skipping insertion in model container [2024-09-25 00:12:06,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:12:06" (3/3) ... [2024-09-25 00:12:06,171 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_linear-inequality-inv-a.c [2024-09-25 00:12:06,186 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 00:12:06,186 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-25 00:12:06,236 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 00:12:06,241 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;@3f226294, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 00:12:06,242 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-25 00:12:06,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 00:12:06,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-25 00:12:06,251 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:06,252 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:06,252 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:06,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:06,257 INFO L85 PathProgramCache]: Analyzing trace with hash -211352663, now seen corresponding path program 1 times [2024-09-25 00:12:06,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:06,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109097592] [2024-09-25 00:12:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:06,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:06,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:06,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:12:06,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:06,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109097592] [2024-09-25 00:12:06,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109097592] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:12:06,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:12:06,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-25 00:12:06,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854364498] [2024-09-25 00:12:06,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:12:06,921 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 00:12:06,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:06,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 00:12:06,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-25 00:12:06,950 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 00:12:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:07,059 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2024-09-25 00:12:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 00:12:07,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2024-09-25 00:12:07,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:07,083 INFO L225 Difference]: With dead ends: 38 [2024-09-25 00:12:07,083 INFO L226 Difference]: Without dead ends: 26 [2024-09-25 00:12:07,086 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-25 00:12:07,092 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:07,093 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 63 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-25 00:12:07,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-09-25 00:12:07,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 00:12:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-09-25 00:12:07,172 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2024-09-25 00:12:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:07,173 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-09-25 00:12:07,174 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 00:12:07,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:07,175 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-09-25 00:12:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-25 00:12:07,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:07,177 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:07,177 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 00:12:07,177 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:07,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:07,179 INFO L85 PathProgramCache]: Analyzing trace with hash 2038005093, now seen corresponding path program 1 times [2024-09-25 00:12:07,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:07,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550709831] [2024-09-25 00:12:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:07,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:07,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:07,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:12:07,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:07,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550709831] [2024-09-25 00:12:07,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550709831] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:12:07,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:12:07,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-25 00:12:07,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409781048] [2024-09-25 00:12:07,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:12:07,381 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 00:12:07,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 00:12:07,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-25 00:12:07,383 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 00:12:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:07,478 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2024-09-25 00:12:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 00:12:07,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-09-25 00:12:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:07,479 INFO L225 Difference]: With dead ends: 26 [2024-09-25 00:12:07,479 INFO L226 Difference]: Without dead ends: 21 [2024-09-25 00:12:07,480 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-25 00:12:07,481 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:07,482 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-25 00:12:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-25 00:12:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-25 00:12:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-25 00:12:07,487 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2024-09-25 00:12:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:07,490 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-25 00:12:07,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 00:12:07,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-25 00:12:07,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-25 00:12:07,492 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:07,492 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:07,492 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-25 00:12:07,493 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:07,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:07,493 INFO L85 PathProgramCache]: Analyzing trace with hash -907560216, now seen corresponding path program 1 times [2024-09-25 00:12:07,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:07,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795353322] [2024-09-25 00:12:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:07,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:07,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:07,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:08,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 00:12:08,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:08,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795353322] [2024-09-25 00:12:08,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795353322] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:08,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534177524] [2024-09-25 00:12:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:08,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:08,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:08,230 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:12:08,236 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 00:12:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:08,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-25 00:12:08,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:08,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:12:08,474 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 25 treesize of output 17 [2024-09-25 00:12:08,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 00:12:08,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 00:12:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:12:08,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:08,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:12:09,033 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 76 treesize of output 72 [2024-09-25 00:12:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:12:09,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534177524] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:12:09,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:12:09,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-09-25 00:12:09,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686269011] [2024-09-25 00:12:09,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:09,544 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-25 00:12:09,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:09,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-25 00:12:09,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-09-25 00:12:09,547 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 22 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 16 states have internal predecessors, (27), 6 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 00:12:11,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-25 00:12:11,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:11,914 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-25 00:12:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 00:12:11,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 16 states have internal predecessors, (27), 6 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 19 [2024-09-25 00:12:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:11,918 INFO L225 Difference]: With dead ends: 34 [2024-09-25 00:12:11,918 INFO L226 Difference]: Without dead ends: 30 [2024-09-25 00:12:11,918 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2024-09-25 00:12:11,919 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:11,919 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 101 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-25 00:12:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-25 00:12:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2024-09-25 00:12:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-25 00:12:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-09-25 00:12:11,933 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2024-09-25 00:12:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:11,933 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-09-25 00:12:11,933 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 16 states have internal predecessors, (27), 6 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 00:12:11,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:11,934 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-09-25 00:12:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-25 00:12:11,937 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:11,937 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:11,966 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 00:12:12,138 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:12,138 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:12,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:12,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1930407430, now seen corresponding path program 1 times [2024-09-25 00:12:12,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:12,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177774869] [2024-09-25 00:12:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:12,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:12,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:12,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:12,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 00:12:12,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177774869] [2024-09-25 00:12:12,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177774869] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781234880] [2024-09-25 00:12:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:12,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:12,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:12,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:12:12,452 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 00:12:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:12,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-25 00:12:12,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:12,568 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 23 treesize of output 19 [2024-09-25 00:12:12,614 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 23 treesize of output 3 [2024-09-25 00:12:12,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:12:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 00:12:12,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:12,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-25 00:12:12,771 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 9 treesize of output 5 [2024-09-25 00:12:12,830 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 25 [2024-09-25 00:12:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:12:12,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781234880] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:12:12,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:12:12,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2024-09-25 00:12:12,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780319702] [2024-09-25 00:12:12,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:12,910 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 00:12:12,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:12,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 00:12:12,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-09-25 00:12:12,911 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 00:12:13,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:13,193 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2024-09-25 00:12:13,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 00:12:13,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 20 [2024-09-25 00:12:13,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:13,194 INFO L225 Difference]: With dead ends: 30 [2024-09-25 00:12:13,194 INFO L226 Difference]: Without dead ends: 25 [2024-09-25 00:12:13,194 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2024-09-25 00:12:13,195 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:13,195 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 81 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:13,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-25 00:12:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-09-25 00:12:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 00:12:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-09-25 00:12:13,200 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2024-09-25 00:12:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:13,200 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-09-25 00:12:13,200 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 00:12:13,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-09-25 00:12:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 00:12:13,201 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:13,201 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:13,217 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 00:12:13,402 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:13,402 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:13,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:13,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1429057543, now seen corresponding path program 2 times [2024-09-25 00:12:13,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:13,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920576000] [2024-09-25 00:12:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:13,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:13,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:13,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:13,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:14,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 00:12:14,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:14,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920576000] [2024-09-25 00:12:14,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920576000] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:14,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28076520] [2024-09-25 00:12:14,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:12:14,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:14,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:14,151 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:12:14,152 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 00:12:14,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:12:14,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:12:14,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-25 00:12:14,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:14,269 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 23 treesize of output 19 [2024-09-25 00:12:14,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:12:14,403 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 23 treesize of output 3 [2024-09-25 00:12:14,430 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 36 treesize of output 24 [2024-09-25 00:12:14,432 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 28 treesize of output 16 [2024-09-25 00:12:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 00:12:14,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:14,693 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 81 treesize of output 65 [2024-09-25 00:12:14,977 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 76 treesize of output 72 [2024-09-25 00:12:18,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28076520] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:18,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:12:18,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2024-09-25 00:12:18,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357062321] [2024-09-25 00:12:18,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:18,799 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 00:12:18,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:18,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 00:12:18,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-09-25 00:12:18,801 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 20 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 00:12:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:19,034 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2024-09-25 00:12:19,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 00:12:19,034 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2024-09-25 00:12:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:19,035 INFO L225 Difference]: With dead ends: 31 [2024-09-25 00:12:19,035 INFO L226 Difference]: Without dead ends: 29 [2024-09-25 00:12:19,036 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2024-09-25 00:12:19,036 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:19,037 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 101 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-25 00:12:19,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-25 00:12:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-25 00:12:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2024-09-25 00:12:19,041 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2024-09-25 00:12:19,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:19,042 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2024-09-25 00:12:19,042 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 00:12:19,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2024-09-25 00:12:19,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-25 00:12:19,043 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:19,043 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:19,056 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 00:12:19,247 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:19,248 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:19,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:19,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1351107819, now seen corresponding path program 2 times [2024-09-25 00:12:19,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:19,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952516492] [2024-09-25 00:12:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:19,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:19,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:19,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:19,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:19,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 00:12:19,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:19,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952516492] [2024-09-25 00:12:19,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952516492] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:19,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522219880] [2024-09-25 00:12:19,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:12:19,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:19,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:19,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:12:19,804 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 00:12:19,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:12:19,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:12:19,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-25 00:12:19,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:19,917 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 23 treesize of output 19 [2024-09-25 00:12:19,998 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 1 [2024-09-25 00:12:20,093 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 23 treesize of output 3 [2024-09-25 00:12:20,116 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 21 [2024-09-25 00:12:20,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:12:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 00:12:20,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:20,390 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 59 treesize of output 47 [2024-09-25 00:12:20,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522219880] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:20,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:12:20,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2024-09-25 00:12:20,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161675398] [2024-09-25 00:12:20,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:20,635 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 00:12:20,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:20,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 00:12:20,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2024-09-25 00:12:20,636 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 20 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 00:12:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:20,864 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2024-09-25 00:12:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 00:12:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 25 [2024-09-25 00:12:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:20,866 INFO L225 Difference]: With dead ends: 32 [2024-09-25 00:12:20,867 INFO L226 Difference]: Without dead ends: 27 [2024-09-25 00:12:20,867 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 00:12:20,868 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:20,868 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 69 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:20,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-25 00:12:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-25 00:12:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-25 00:12:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-25 00:12:20,873 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2024-09-25 00:12:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:20,874 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-25 00:12:20,874 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 00:12:20,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-25 00:12:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-25 00:12:20,875 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:20,875 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:20,888 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 00:12:21,078 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:21,079 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:21,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash 450584184, now seen corresponding path program 3 times [2024-09-25 00:12:21,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:21,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85258783] [2024-09-25 00:12:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:21,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:21,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:21,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:21,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:22,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:22,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-25 00:12:22,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:22,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85258783] [2024-09-25 00:12:22,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85258783] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:22,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349424892] [2024-09-25 00:12:22,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:12:22,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:22,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:22,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:12:22,245 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 00:12:22,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 00:12:22,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:12:22,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-25 00:12:22,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:22,455 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 23 treesize of output 19 [2024-09-25 00:12:22,539 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 23 treesize of output 19 [2024-09-25 00:12:22,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:12:22,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-25 00:12:22,805 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 36 treesize of output 24 [2024-09-25 00:12:22,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-25 00:12:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 00:12:22,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:23,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 93 [2024-09-25 00:12:23,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2024-09-25 00:12:23,750 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 48 [2024-09-25 00:12:23,758 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 78 treesize of output 74 [2024-09-25 00:12:24,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349424892] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:24,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:12:24,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-09-25 00:12:24,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876087937] [2024-09-25 00:12:24,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:24,041 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-25 00:12:24,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:24,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-25 00:12:24,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2024-09-25 00:12:24,043 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 26 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 9 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 00:12:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:24,317 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2024-09-25 00:12:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 00:12:24,318 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 9 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 29 [2024-09-25 00:12:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:24,318 INFO L225 Difference]: With dead ends: 33 [2024-09-25 00:12:24,318 INFO L226 Difference]: Without dead ends: 31 [2024-09-25 00:12:24,319 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 00:12:24,319 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:24,320 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 119 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-25 00:12:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-25 00:12:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-25 00:12:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-09-25 00:12:24,325 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 29 [2024-09-25 00:12:24,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:24,326 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-09-25 00:12:24,326 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 9 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 00:12:24,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-09-25 00:12:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-25 00:12:24,327 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:24,327 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:24,340 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 00:12:24,527 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-25 00:12:24,528 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:24,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:24,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1083210870, now seen corresponding path program 3 times [2024-09-25 00:12:24,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:24,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533723485] [2024-09-25 00:12:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:24,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:24,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:24,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:25,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:25,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:25,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-25 00:12:25,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:25,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533723485] [2024-09-25 00:12:25,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533723485] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:25,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662015781] [2024-09-25 00:12:25,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:12:25,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:25,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:25,346 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:12:25,347 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 00:12:25,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 00:12:25,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:12:25,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-25 00:12:25,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:25,525 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 23 treesize of output 19 [2024-09-25 00:12:25,579 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 23 treesize of output 19 [2024-09-25 00:12:25,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:12:25,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-25 00:12:25,760 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 21 [2024-09-25 00:12:25,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:12:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-25 00:12:25,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:26,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 68 [2024-09-25 00:12:26,137 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 68 treesize of output 56 [2024-09-25 00:12:26,469 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 30 treesize of output 26 [2024-09-25 00:12:26,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662015781] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:26,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:12:26,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2024-09-25 00:12:26,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230987751] [2024-09-25 00:12:26,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:26,520 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 00:12:26,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:26,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 00:12:26,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2024-09-25 00:12:26,521 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 24 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-25 00:12:26,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:26,730 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-25 00:12:26,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 00:12:26,730 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 30 [2024-09-25 00:12:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:26,731 INFO L225 Difference]: With dead ends: 34 [2024-09-25 00:12:26,731 INFO L226 Difference]: Without dead ends: 29 [2024-09-25 00:12:26,731 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=1076, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 00:12:26,732 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:26,732 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 68 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-25 00:12:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-25 00:12:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-25 00:12:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-09-25 00:12:26,736 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 30 [2024-09-25 00:12:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:26,737 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-09-25 00:12:26,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-25 00:12:26,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-09-25 00:12:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-25 00:12:26,738 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:26,738 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:26,751 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 00:12:26,941 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:26,942 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:26,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:26,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2115644489, now seen corresponding path program 4 times [2024-09-25 00:12:26,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:26,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652330591] [2024-09-25 00:12:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:26,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:27,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:27,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:27,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:28,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:28,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:28,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-25 00:12:28,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:28,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652330591] [2024-09-25 00:12:28,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652330591] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:28,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475183964] [2024-09-25 00:12:28,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:12:28,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:28,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:28,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:12:28,576 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 00:12:28,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:12:28,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:12:28,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-25 00:12:28,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:28,772 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 23 treesize of output 19 [2024-09-25 00:12:28,827 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 23 treesize of output 19 [2024-09-25 00:12:28,858 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 23 treesize of output 19 [2024-09-25 00:12:28,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:12:29,057 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 23 treesize of output 3 [2024-09-25 00:12:29,098 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 36 treesize of output 24 [2024-09-25 00:12:29,101 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 28 treesize of output 16 [2024-09-25 00:12:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 00:12:29,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:29,660 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 137 treesize of output 121 [2024-09-25 00:12:29,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 105 [2024-09-25 00:12:29,669 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 89 [2024-09-25 00:12:30,190 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 59 treesize of output 55 [2024-09-25 00:12:30,193 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 53 treesize of output 49 [2024-09-25 00:12:30,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2024-09-25 00:12:30,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475183964] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:30,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:12:30,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2024-09-25 00:12:30,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342569163] [2024-09-25 00:12:30,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:30,526 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 00:12:30,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:30,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 00:12:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2024-09-25 00:12:30,527 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-25 00:12:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:30,739 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2024-09-25 00:12:30,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 00:12:30,740 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2024-09-25 00:12:30,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:30,740 INFO L225 Difference]: With dead ends: 35 [2024-09-25 00:12:30,740 INFO L226 Difference]: Without dead ends: 33 [2024-09-25 00:12:30,741 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 00:12:30,741 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:30,741 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 113 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:30,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-25 00:12:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-25 00:12:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-25 00:12:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2024-09-25 00:12:30,746 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 34 [2024-09-25 00:12:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:30,747 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2024-09-25 00:12:30,747 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-25 00:12:30,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2024-09-25 00:12:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-25 00:12:30,748 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:30,748 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:30,761 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 00:12:30,951 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:30,952 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:30,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:30,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1160472773, now seen corresponding path program 4 times [2024-09-25 00:12:30,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:30,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076991210] [2024-09-25 00:12:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:30,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:31,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:31,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:31,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:31,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:31,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:32,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 00:12:32,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:32,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076991210] [2024-09-25 00:12:32,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076991210] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:32,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773577610] [2024-09-25 00:12:32,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:12:32,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:32,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:32,082 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:12:32,083 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 00:12:32,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:12:32,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:12:32,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-25 00:12:32,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:32,270 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 23 treesize of output 19 [2024-09-25 00:12:32,317 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 23 treesize of output 19 [2024-09-25 00:12:32,344 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 23 treesize of output 19 [2024-09-25 00:12:32,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:12:32,536 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 23 treesize of output 3 [2024-09-25 00:12:32,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-09-25 00:12:32,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:12:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 00:12:32,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:33,007 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 89 [2024-09-25 00:12:33,012 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 89 treesize of output 77 [2024-09-25 00:12:33,041 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 65 treesize of output 53 [2024-09-25 00:12:33,569 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 33 [2024-09-25 00:12:33,573 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 [2024-09-25 00:12:33,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773577610] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:33,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:12:33,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2024-09-25 00:12:33,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199699490] [2024-09-25 00:12:33,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:33,632 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-25 00:12:33,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:33,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-25 00:12:33,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2024-09-25 00:12:33,633 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 7 states have call successors, (8), 4 states have call predecessors, (8), 11 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-25 00:12:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:33,867 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-09-25 00:12:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 00:12:33,867 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 7 states have call successors, (8), 4 states have call predecessors, (8), 11 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) Word has length 35 [2024-09-25 00:12:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:33,868 INFO L225 Difference]: With dead ends: 36 [2024-09-25 00:12:33,868 INFO L226 Difference]: Without dead ends: 31 [2024-09-25 00:12:33,868 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2024-09-25 00:12:33,869 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:33,869 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 109 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-25 00:12:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-25 00:12:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-25 00:12:33,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2024-09-25 00:12:33,885 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 35 [2024-09-25 00:12:33,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:33,885 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2024-09-25 00:12:33,885 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 7 states have call successors, (8), 4 states have call predecessors, (8), 11 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-25 00:12:33,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:33,885 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2024-09-25 00:12:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-25 00:12:33,886 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:33,886 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:33,925 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 00:12:34,086 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:34,087 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:34,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:34,087 INFO L85 PathProgramCache]: Analyzing trace with hash 964329992, now seen corresponding path program 5 times [2024-09-25 00:12:34,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:34,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475920649] [2024-09-25 00:12:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:34,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:34,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:34,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:35,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:35,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:35,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:36,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:36,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 00:12:36,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:36,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475920649] [2024-09-25 00:12:36,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475920649] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:36,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453550064] [2024-09-25 00:12:36,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:12:36,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:36,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:36,327 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:12:36,328 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 00:12:36,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-25 00:12:36,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:12:36,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-09-25 00:12:36,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:36,586 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 23 treesize of output 19 [2024-09-25 00:12:36,638 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 23 treesize of output 19 [2024-09-25 00:12:36,678 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 23 treesize of output 19 [2024-09-25 00:12:36,707 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 23 treesize of output 19 [2024-09-25 00:12:36,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:12:36,945 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 23 treesize of output 3 [2024-09-25 00:12:36,975 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 36 treesize of output 24 [2024-09-25 00:12:36,976 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 28 treesize of output 16 [2024-09-25 00:12:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-25 00:12:36,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:37,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 149 [2024-09-25 00:12:37,608 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 149 treesize of output 133 [2024-09-25 00:12:37,611 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 133 treesize of output 117 [2024-09-25 00:12:37,614 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 117 treesize of output 101 [2024-09-25 00:12:38,528 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 62 [2024-09-25 00:12:38,532 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 56 [2024-09-25 00:12:38,536 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 54 treesize of output 50 [2024-09-25 00:12:38,541 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 82 treesize of output 78 [2024-09-25 00:12:39,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453550064] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:39,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:12:39,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2024-09-25 00:12:39,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669329343] [2024-09-25 00:12:39,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:39,011 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 00:12:39,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:39,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 00:12:39,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2024-09-25 00:12:39,013 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-25 00:12:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:39,253 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2024-09-25 00:12:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 00:12:39,253 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) Word has length 39 [2024-09-25 00:12:39,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:39,254 INFO L225 Difference]: With dead ends: 37 [2024-09-25 00:12:39,254 INFO L226 Difference]: Without dead ends: 35 [2024-09-25 00:12:39,254 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 00:12:39,255 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:39,255 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 143 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:39,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-25 00:12:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-25 00:12:39,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 8 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-25 00:12:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2024-09-25 00:12:39,260 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 39 [2024-09-25 00:12:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:39,260 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2024-09-25 00:12:39,260 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-25 00:12:39,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2024-09-25 00:12:39,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 00:12:39,261 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:39,261 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:39,275 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 00:12:39,462 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-25 00:12:39,462 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:39,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:39,462 INFO L85 PathProgramCache]: Analyzing trace with hash -170538266, now seen corresponding path program 5 times [2024-09-25 00:12:39,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:39,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378601610] [2024-09-25 00:12:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:39,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:39,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:39,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:40,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:40,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:40,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:40,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:40,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-25 00:12:40,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:40,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378601610] [2024-09-25 00:12:40,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378601610] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:40,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804062840] [2024-09-25 00:12:40,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:12:40,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:40,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:40,863 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) [2024-09-25 00:12:40,864 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 00:12:41,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-25 00:12:41,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:12:41,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-25 00:12:41,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:41,179 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 23 treesize of output 19 [2024-09-25 00:12:41,213 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 23 treesize of output 19 [2024-09-25 00:12:41,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:12:41,247 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 23 treesize of output 19 [2024-09-25 00:12:41,263 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 23 treesize of output 19 [2024-09-25 00:12:41,412 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 23 treesize of output 3 [2024-09-25 00:12:41,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:12:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-25 00:12:41,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:41,689 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 41 [2024-09-25 00:12:41,700 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 122 treesize of output 110 [2024-09-25 00:12:41,703 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 110 treesize of output 98 [2024-09-25 00:12:41,708 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 [2024-09-25 00:12:41,714 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 86 treesize of output 74 [2024-09-25 00:12:42,218 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 46 [2024-09-25 00:12:42,223 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 44 treesize of output 40 [2024-09-25 00:12:42,228 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 38 treesize of output 34 [2024-09-25 00:12:42,233 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 32 treesize of output 28 [2024-09-25 00:12:42,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804062840] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:42,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:12:42,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2024-09-25 00:12:42,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892762162] [2024-09-25 00:12:42,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:42,312 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 00:12:42,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:42,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 00:12:42,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2024-09-25 00:12:42,316 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 25 states, 20 states have (on average 1.55) internal successors, (31), 23 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 12 states have return successors, (13), 13 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-25 00:12:42,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:42,520 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2024-09-25 00:12:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 00:12:42,520 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.55) internal successors, (31), 23 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 12 states have return successors, (13), 13 states have call predecessors, (13), 7 states have call successors, (13) Word has length 40 [2024-09-25 00:12:42,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:42,523 INFO L225 Difference]: With dead ends: 38 [2024-09-25 00:12:42,524 INFO L226 Difference]: Without dead ends: 33 [2024-09-25 00:12:42,524 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 00:12:42,525 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:42,525 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 87 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:42,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-25 00:12:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-25 00:12:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-25 00:12:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-25 00:12:42,543 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 40 [2024-09-25 00:12:42,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:42,543 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-25 00:12:42,543 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.55) internal successors, (31), 23 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 12 states have return successors, (13), 13 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-25 00:12:42,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-25 00:12:42,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-25 00:12:42,548 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:42,548 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:42,565 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-25 00:12:42,749 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-25 00:12:42,749 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:42,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:42,751 INFO L85 PathProgramCache]: Analyzing trace with hash 365992089, now seen corresponding path program 6 times [2024-09-25 00:12:42,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:42,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831463812] [2024-09-25 00:12:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:42,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:43,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:43,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:44,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:44,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:44,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:45,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:45,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:45,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-25 00:12:45,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831463812] [2024-09-25 00:12:45,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831463812] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886026594] [2024-09-25 00:12:45,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 00:12:45,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:45,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:45,522 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) [2024-09-25 00:12:45,523 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 00:12:45,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-25 00:12:45,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:12:45,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-09-25 00:12:45,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:45,901 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 23 treesize of output 19 [2024-09-25 00:12:45,960 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 23 treesize of output 19 [2024-09-25 00:12:45,990 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 23 treesize of output 19 [2024-09-25 00:12:46,020 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 23 treesize of output 19 [2024-09-25 00:12:46,049 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 23 treesize of output 19 [2024-09-25 00:12:46,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:12:46,368 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 23 treesize of output 3 [2024-09-25 00:12:46,398 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 36 treesize of output 24 [2024-09-25 00:12:46,400 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 28 treesize of output 16 [2024-09-25 00:12:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-25 00:12:46,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:47,433 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 193 treesize of output 177 [2024-09-25 00:12:47,437 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 177 treesize of output 161 [2024-09-25 00:12:47,445 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 161 treesize of output 145 [2024-09-25 00:12:47,452 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 145 treesize of output 129 [2024-09-25 00:12:47,458 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 129 treesize of output 113 [2024-09-25 00:12:48,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2024-09-25 00:12:48,616 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 63 [2024-09-25 00:12:48,622 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 57 [2024-09-25 00:12:48,628 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 55 treesize of output 51 [2024-09-25 00:12:48,635 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 84 treesize of output 80 [2024-09-25 00:12:49,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886026594] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:49,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:12:49,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2024-09-25 00:12:49,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673549234] [2024-09-25 00:12:49,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:49,471 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-25 00:12:49,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:49,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-25 00:12:49,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 00:12:49,472 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 30 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 26 states have internal predecessors, (34), 8 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-25 00:12:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:49,684 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2024-09-25 00:12:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 00:12:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 26 states have internal predecessors, (34), 8 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) Word has length 44 [2024-09-25 00:12:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:49,686 INFO L225 Difference]: With dead ends: 39 [2024-09-25 00:12:49,686 INFO L226 Difference]: Without dead ends: 37 [2024-09-25 00:12:49,686 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 00:12:49,687 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:49,687 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 105 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-25 00:12:49,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-25 00:12:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 9 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-25 00:12:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2024-09-25 00:12:49,692 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 44 [2024-09-25 00:12:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:49,693 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-09-25 00:12:49,693 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 26 states have internal predecessors, (34), 8 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-25 00:12:49,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2024-09-25 00:12:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-25 00:12:49,694 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:49,694 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:49,707 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-25 00:12:49,897 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:49,897 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:49,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:49,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1539144075, now seen corresponding path program 6 times [2024-09-25 00:12:49,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:49,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066153390] [2024-09-25 00:12:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:49,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-25 00:12:51,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:51,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066153390] [2024-09-25 00:12:51,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066153390] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:51,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406824787] [2024-09-25 00:12:51,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 00:12:51,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:51,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:51,787 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) [2024-09-25 00:12:51,788 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 00:12:52,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-25 00:12:52,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:12:52,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-09-25 00:12:52,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:52,286 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 23 treesize of output 19 [2024-09-25 00:12:52,338 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 23 treesize of output 19 [2024-09-25 00:12:52,379 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 23 treesize of output 19 [2024-09-25 00:12:52,426 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 23 treesize of output 19 [2024-09-25 00:12:52,452 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 23 treesize of output 19 [2024-09-25 00:12:52,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:12:52,713 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 23 treesize of output 3 [2024-09-25 00:12:52,737 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 21 [2024-09-25 00:12:52,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:12:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 67 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-25 00:12:52,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:53,575 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 143 treesize of output 131 [2024-09-25 00:12:53,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 496 treesize of output 448 [2024-09-25 00:12:53,596 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 448 treesize of output 400 [2024-09-25 00:12:53,602 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 400 treesize of output 352 [2024-09-25 00:12:53,608 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 352 treesize of output 304 [2024-09-25 00:12:55,175 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 47 [2024-09-25 00:12:55,179 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 41 [2024-09-25 00:12:55,183 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 35 [2024-09-25 00:12:55,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-09-25 00:12:55,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406824787] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:55,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:12:55,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2024-09-25 00:12:55,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614953314] [2024-09-25 00:12:55,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:55,278 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-25 00:12:55,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:55,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-25 00:12:55,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 00:12:55,279 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 32 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 29 states have internal predecessors, (37), 8 states have call successors, (9), 4 states have call predecessors, (9), 15 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-25 00:12:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:55,562 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-25 00:12:55,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 00:12:55,562 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 29 states have internal predecessors, (37), 8 states have call successors, (9), 4 states have call predecessors, (9), 15 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) Word has length 45 [2024-09-25 00:12:55,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:55,563 INFO L225 Difference]: With dead ends: 40 [2024-09-25 00:12:55,563 INFO L226 Difference]: Without dead ends: 35 [2024-09-25 00:12:55,564 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1586, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 00:12:55,564 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:55,564 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 140 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:55,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-25 00:12:55,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-25 00:12:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-25 00:12:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2024-09-25 00:12:55,571 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2024-09-25 00:12:55,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:55,571 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2024-09-25 00:12:55,573 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 29 states have internal predecessors, (37), 8 states have call successors, (9), 4 states have call predecessors, (9), 15 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-25 00:12:55,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2024-09-25 00:12:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-25 00:12:55,574 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:55,574 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:55,591 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-25 00:12:55,775 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 00:12:55,775 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:55,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:55,776 INFO L85 PathProgramCache]: Analyzing trace with hash 585835928, now seen corresponding path program 7 times [2024-09-25 00:12:55,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:55,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160913272] [2024-09-25 00:12:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:55,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:56,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:56,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:12:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:57,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:57,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:58,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:58,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:58,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:59,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:59,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 17 proven. 63 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-25 00:12:59,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:59,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160913272] [2024-09-25 00:12:59,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160913272] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:59,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354676608] [2024-09-25 00:12:59,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 00:12:59,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:59,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:59,193 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) [2024-09-25 00:12:59,194 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 00:12:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:59,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-09-25 00:12:59,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:59,485 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 23 treesize of output 19 [2024-09-25 00:12:59,538 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 23 treesize of output 19 [2024-09-25 00:12:59,565 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 23 treesize of output 19 [2024-09-25 00:12:59,591 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 23 treesize of output 19 [2024-09-25 00:12:59,617 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 23 treesize of output 19 [2024-09-25 00:12:59,642 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 23 treesize of output 19 [2024-09-25 00:12:59,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:12:59,979 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 23 treesize of output 3 [2024-09-25 00:13:00,006 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 36 treesize of output 24 [2024-09-25 00:13:00,008 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 28 treesize of output 16 [2024-09-25 00:13:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-25 00:13:00,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:13:00,926 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 221 treesize of output 205 [2024-09-25 00:13:00,930 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 205 treesize of output 189 [2024-09-25 00:13:00,933 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 189 treesize of output 173 [2024-09-25 00:13:00,935 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 173 treesize of output 157 [2024-09-25 00:13:00,938 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 157 treesize of output 141 [2024-09-25 00:13:00,942 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 141 treesize of output 125 [2024-09-25 00:13:02,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2024-09-25 00:13:02,396 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 74 treesize of output 70 [2024-09-25 00:13:02,401 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 68 treesize of output 64 [2024-09-25 00:13:02,405 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 58 [2024-09-25 00:13:02,410 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 52 [2024-09-25 00:13:02,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2024-09-25 00:13:03,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354676608] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:03,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:13:03,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 31 [2024-09-25 00:13:03,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003512594] [2024-09-25 00:13:03,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:13:03,039 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-25 00:13:03,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:13:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-25 00:13:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 00:13:03,040 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 31 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 8 states have call successors, (9), 4 states have call predecessors, (9), 16 states have return successors, (17), 17 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-25 00:13:03,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:13:03,249 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2024-09-25 00:13:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 00:13:03,250 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 8 states have call successors, (9), 4 states have call predecessors, (9), 16 states have return successors, (17), 17 states have call predecessors, (17), 8 states have call successors, (17) Word has length 49 [2024-09-25 00:13:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:13:03,251 INFO L225 Difference]: With dead ends: 41 [2024-09-25 00:13:03,251 INFO L226 Difference]: Without dead ends: 39 [2024-09-25 00:13:03,251 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=284, Invalid=1356, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 00:13:03,252 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:13:03,252 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 123 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:13:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-25 00:13:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-25 00:13:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 10 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-25 00:13:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-09-25 00:13:03,257 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 49 [2024-09-25 00:13:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:13:03,257 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-09-25 00:13:03,257 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 8 states have call successors, (9), 4 states have call predecessors, (9), 16 states have return successors, (17), 17 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-25 00:13:03,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-09-25 00:13:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-25 00:13:03,258 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:13:03,258 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:13:03,272 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-25 00:13:03,462 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-25 00:13:03,462 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:13:03,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:03,462 INFO L85 PathProgramCache]: Analyzing trace with hash 981047638, now seen corresponding path program 7 times [2024-09-25 00:13:03,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:13:03,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063791215] [2024-09-25 00:13:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:13:03,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:13:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:04,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:13:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:04,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:13:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:04,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:05,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:05,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:05,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:05,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:06,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:06,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-25 00:13:06,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:13:06,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063791215] [2024-09-25 00:13:06,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063791215] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:06,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395152154] [2024-09-25 00:13:06,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 00:13:06,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:13:06,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:13:06,122 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) [2024-09-25 00:13:06,126 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 00:13:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:06,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-25 00:13:06,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:13:06,403 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 23 treesize of output 19 [2024-09-25 00:13:06,434 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 23 treesize of output 19 [2024-09-25 00:13:06,450 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 23 treesize of output 19 [2024-09-25 00:13:06,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:13:06,483 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 23 treesize of output 19 [2024-09-25 00:13:06,499 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 23 treesize of output 19 [2024-09-25 00:13:06,514 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 23 treesize of output 19 [2024-09-25 00:13:06,725 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 23 treesize of output 3 [2024-09-25 00:13:06,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:13:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-25 00:13:06,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:13:07,191 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 59 treesize of output 55 [2024-09-25 00:13:07,202 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 164 treesize of output 152 [2024-09-25 00:13:07,207 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 152 treesize of output 140 [2024-09-25 00:13:07,213 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 140 treesize of output 128 [2024-09-25 00:13:07,221 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 128 treesize of output 116 [2024-09-25 00:13:07,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 104 [2024-09-25 00:13:07,302 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 86 treesize of output 74 [2024-09-25 00:13:08,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2024-09-25 00:13:08,154 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 58 treesize of output 54 [2024-09-25 00:13:08,163 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 48 [2024-09-25 00:13:08,168 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 46 treesize of output 42 [2024-09-25 00:13:08,173 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 40 treesize of output 36 [2024-09-25 00:13:08,182 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 34 treesize of output 30 [2024-09-25 00:13:08,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395152154] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:08,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:13:08,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 27 [2024-09-25 00:13:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094735447] [2024-09-25 00:13:08,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:13:08,346 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 00:13:08,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:13:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 00:13:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2024-09-25 00:13:08,348 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 27 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 26 states have internal predecessors, (34), 6 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (17), 16 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-25 00:13:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:13:08,481 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-09-25 00:13:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 00:13:08,482 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 26 states have internal predecessors, (34), 6 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (17), 16 states have call predecessors, (17), 6 states have call successors, (17) Word has length 50 [2024-09-25 00:13:08,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:13:08,482 INFO L225 Difference]: With dead ends: 42 [2024-09-25 00:13:08,482 INFO L226 Difference]: Without dead ends: 37 [2024-09-25 00:13:08,483 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 00:13:08,483 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:13:08,483 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 74 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:13:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-25 00:13:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-25 00:13:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-25 00:13:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2024-09-25 00:13:08,488 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50 [2024-09-25 00:13:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:13:08,489 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2024-09-25 00:13:08,489 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 26 states have internal predecessors, (34), 6 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (17), 16 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-25 00:13:08,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2024-09-25 00:13:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-25 00:13:08,489 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:13:08,490 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:13:08,503 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-25 00:13:08,693 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-25 00:13:08,693 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:13:08,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash 419927273, now seen corresponding path program 8 times [2024-09-25 00:13:08,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:13:08,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463918836] [2024-09-25 00:13:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:13:08,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:13:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:13:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:13:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:10,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:11,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:11,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:12,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:12,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:12,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:13,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:13,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 20 proven. 80 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-25 00:13:13,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:13:13,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463918836] [2024-09-25 00:13:13,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463918836] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:13,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544670077] [2024-09-25 00:13:13,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:13:13,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:13:13,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:13:13,229 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) [2024-09-25 00:13:13,230 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 00:13:13,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:13:13,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:13:13,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 173 conjuncts are in the unsatisfiable core [2024-09-25 00:13:13,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:13:13,556 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 23 treesize of output 19 [2024-09-25 00:13:13,609 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 23 treesize of output 19 [2024-09-25 00:13:13,634 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 23 treesize of output 19 [2024-09-25 00:13:13,659 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 23 treesize of output 19 [2024-09-25 00:13:13,683 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 23 treesize of output 19 [2024-09-25 00:13:13,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:13:13,735 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 23 treesize of output 19 [2024-09-25 00:13:13,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:13:14,111 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 23 treesize of output 3 [2024-09-25 00:13:14,137 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 36 treesize of output 24 [2024-09-25 00:13:14,139 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 28 treesize of output 16 [2024-09-25 00:13:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 8 proven. 87 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-25 00:13:14,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:13:15,019 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 249 treesize of output 233 [2024-09-25 00:13:15,023 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 233 treesize of output 217 [2024-09-25 00:13:15,026 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 217 treesize of output 201 [2024-09-25 00:13:15,029 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 201 treesize of output 185 [2024-09-25 00:13:15,032 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 185 treesize of output 169 [2024-09-25 00:13:15,035 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 169 treesize of output 153 [2024-09-25 00:13:15,038 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 153 treesize of output 137 [2024-09-25 00:13:16,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 83 [2024-09-25 00:13:16,893 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 81 treesize of output 77 [2024-09-25 00:13:16,900 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 75 treesize of output 71 [2024-09-25 00:13:16,906 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 65 [2024-09-25 00:13:16,912 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 63 treesize of output 59 [2024-09-25 00:13:16,920 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 57 treesize of output 53 [2024-09-25 00:13:16,935 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 88 treesize of output 84 [2024-09-25 00:13:17,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544670077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:17,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:13:17,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2024-09-25 00:13:17,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067114456] [2024-09-25 00:13:17,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:13:17,586 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-25 00:13:17,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:13:17,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-25 00:13:17,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 00:13:17,588 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 32 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 7 states have call successors, (9), 4 states have call predecessors, (9), 18 states have return successors, (19), 19 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-25 00:13:17,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:13:17,779 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2024-09-25 00:13:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 00:13:17,779 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 7 states have call successors, (9), 4 states have call predecessors, (9), 18 states have return successors, (19), 19 states have call predecessors, (19), 7 states have call successors, (19) Word has length 54 [2024-09-25 00:13:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:13:17,780 INFO L225 Difference]: With dead ends: 43 [2024-09-25 00:13:17,780 INFO L226 Difference]: Without dead ends: 41 [2024-09-25 00:13:17,781 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 00:13:17,781 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:13:17,781 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 114 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:13:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-25 00:13:17,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-25 00:13:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 11 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-25 00:13:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2024-09-25 00:13:17,786 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 54 [2024-09-25 00:13:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:13:17,786 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2024-09-25 00:13:17,786 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 7 states have call successors, (9), 4 states have call predecessors, (9), 18 states have return successors, (19), 19 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-25 00:13:17,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:17,786 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2024-09-25 00:13:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-25 00:13:17,787 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:13:17,787 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:13:17,803 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-25 00:13:17,991 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-25 00:13:17,992 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:13:17,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash 132846629, now seen corresponding path program 8 times [2024-09-25 00:13:17,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:13:17,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902167525] [2024-09-25 00:13:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:13:17,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:13:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:18,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:13:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:18,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:13:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:19,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:20,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:20,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:20,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:21,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:21,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:21,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:21,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-25 00:13:21,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:13:21,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902167525] [2024-09-25 00:13:21,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902167525] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:21,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581782984] [2024-09-25 00:13:21,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:13:21,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:13:21,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:13:21,449 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:13:21,450 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 00:13:21,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:13:21,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:13:21,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-09-25 00:13:21,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:13:21,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:13:21,828 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 23 treesize of output 19 [2024-09-25 00:13:21,853 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 23 treesize of output 19 [2024-09-25 00:13:21,877 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 23 treesize of output 19 [2024-09-25 00:13:21,901 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 23 treesize of output 19 [2024-09-25 00:13:21,925 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 23 treesize of output 19 [2024-09-25 00:13:21,966 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 23 treesize of output 19 [2024-09-25 00:13:21,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:13:22,254 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 23 treesize of output 3 [2024-09-25 00:13:22,268 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 21 [2024-09-25 00:13:22,272 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 22 treesize of output 10 [2024-09-25 00:13:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 8 proven. 87 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-25 00:13:22,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:13:23,156 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 185 treesize of output 173 [2024-09-25 00:13:23,160 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 173 treesize of output 161 [2024-09-25 00:13:23,165 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 161 treesize of output 149 [2024-09-25 00:13:23,172 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 149 treesize of output 137 [2024-09-25 00:13:23,180 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 137 treesize of output 125 [2024-09-25 00:13:23,193 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 113 [2024-09-25 00:13:23,206 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 113 treesize of output 101 [2024-09-25 00:13:24,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2024-09-25 00:13:24,593 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 59 treesize of output 55 [2024-09-25 00:13:24,597 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 53 treesize of output 49 [2024-09-25 00:13:24,601 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 43 [2024-09-25 00:13:24,607 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 41 treesize of output 37 [2024-09-25 00:13:24,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-25 00:13:24,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581782984] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:24,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:13:24,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 32 [2024-09-25 00:13:24,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738876015] [2024-09-25 00:13:24,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:13:24,716 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-25 00:13:24,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:13:24,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-25 00:13:24,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1047, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 00:13:24,717 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 32 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 6 states have call successors, (8), 4 states have call predecessors, (8), 19 states have return successors, (19), 19 states have call predecessors, (19), 6 states have call successors, (19) [2024-09-25 00:13:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:13:24,929 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2024-09-25 00:13:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 00:13:24,930 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 6 states have call successors, (8), 4 states have call predecessors, (8), 19 states have return successors, (19), 19 states have call predecessors, (19), 6 states have call successors, (19) Word has length 55 [2024-09-25 00:13:24,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:13:24,930 INFO L225 Difference]: With dead ends: 44 [2024-09-25 00:13:24,930 INFO L226 Difference]: Without dead ends: 39 [2024-09-25 00:13:24,931 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=424, Invalid=1556, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 00:13:24,931 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:13:24,931 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 103 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:13:24,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-25 00:13:24,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-25 00:13:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-25 00:13:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-25 00:13:24,938 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-25 00:13:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:13:24,938 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-25 00:13:24,938 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 6 states have call successors, (8), 4 states have call predecessors, (8), 19 states have return successors, (19), 19 states have call predecessors, (19), 6 states have call successors, (19) [2024-09-25 00:13:24,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-25 00:13:24,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-25 00:13:24,940 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:13:24,941 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:13:24,955 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-25 00:13:25,145 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:13:25,146 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:13:25,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:25,146 INFO L85 PathProgramCache]: Analyzing trace with hash -372029144, now seen corresponding path program 9 times [2024-09-25 00:13:25,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:13:25,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881891984] [2024-09-25 00:13:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:13:25,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:13:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:26,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:13:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:26,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:13:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:27,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:28,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:30,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:30,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:30,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:30,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:30,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 23 proven. 99 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-25 00:13:31,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:13:31,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881891984] [2024-09-25 00:13:31,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881891984] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:31,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180027428] [2024-09-25 00:13:31,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:13:31,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:13:31,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:13:31,025 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:13:31,027 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 00:13:33,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-25 00:13:33,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:13:33,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 227 conjuncts are in the unsatisfiable core [2024-09-25 00:13:33,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:13:33,546 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 23 treesize of output 19 [2024-09-25 00:13:33,655 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 23 treesize of output 19 [2024-09-25 00:13:33,715 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 23 treesize of output 19 [2024-09-25 00:13:33,770 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 23 treesize of output 19 [2024-09-25 00:13:33,794 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 23 treesize of output 19 [2024-09-25 00:13:33,817 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 23 treesize of output 19 [2024-09-25 00:13:33,840 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 23 treesize of output 19 [2024-09-25 00:13:33,864 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 23 treesize of output 19 [2024-09-25 00:13:33,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:13:34,331 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 23 treesize of output 3 [2024-09-25 00:13:34,358 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 36 treesize of output 24 [2024-09-25 00:13:34,359 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 28 treesize of output 16 [2024-09-25 00:13:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 8 proven. 144 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-25 00:13:34,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:13:35,721 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 277 treesize of output 261 [2024-09-25 00:13:35,724 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 261 treesize of output 245 [2024-09-25 00:13:35,727 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 245 treesize of output 229 [2024-09-25 00:13:35,730 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 229 treesize of output 213 [2024-09-25 00:13:35,733 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 213 treesize of output 197 [2024-09-25 00:13:35,735 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 197 treesize of output 181 [2024-09-25 00:13:35,738 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 181 treesize of output 165 [2024-09-25 00:13:35,741 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 165 treesize of output 149 [2024-09-25 00:13:37,650 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 94 treesize of output 90 [2024-09-25 00:13:37,654 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 88 treesize of output 84 [2024-09-25 00:13:37,659 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 82 treesize of output 78 [2024-09-25 00:13:37,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2024-09-25 00:13:37,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2024-09-25 00:13:37,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2024-09-25 00:13:37,680 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 58 treesize of output 54 [2024-09-25 00:13:37,688 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 90 treesize of output 86 [2024-09-25 00:13:38,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180027428] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:38,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:13:38,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 40 [2024-09-25 00:13:38,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754874197] [2024-09-25 00:13:38,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:13:38,564 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-25 00:13:38,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:13:38,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-25 00:13:38,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 00:13:38,565 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 40 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 10 states have call successors, (11), 5 states have call predecessors, (11), 20 states have return successors, (21), 21 states have call predecessors, (21), 10 states have call successors, (21) [2024-09-25 00:13:38,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:13:38,956 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2024-09-25 00:13:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 00:13:38,956 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 10 states have call successors, (11), 5 states have call predecessors, (11), 20 states have return successors, (21), 21 states have call predecessors, (21), 10 states have call successors, (21) Word has length 59 [2024-09-25 00:13:38,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:13:38,957 INFO L225 Difference]: With dead ends: 45 [2024-09-25 00:13:38,957 INFO L226 Difference]: Without dead ends: 43 [2024-09-25 00:13:38,958 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=407, Invalid=2043, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 00:13:38,958 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:13:38,958 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 162 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 00:13:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-25 00:13:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-25 00:13:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 12 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-25 00:13:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-09-25 00:13:38,963 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 59 [2024-09-25 00:13:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:13:38,963 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-09-25 00:13:38,964 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 10 states have call successors, (11), 5 states have call predecessors, (11), 20 states have return successors, (21), 21 states have call predecessors, (21), 10 states have call successors, (21) [2024-09-25 00:13:38,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-09-25 00:13:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-25 00:13:38,964 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:13:38,964 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:13:38,982 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-25 00:13:39,165 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:13:39,165 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:13:39,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:39,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1352001478, now seen corresponding path program 9 times [2024-09-25 00:13:39,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:13:39,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288368664] [2024-09-25 00:13:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:13:39,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:13:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:40,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:13:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:40,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:13:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:41,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:41,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:42,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:42,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:43,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:43,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:43,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:43,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:43,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 99 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-09-25 00:13:43,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:13:43,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288368664] [2024-09-25 00:13:43,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288368664] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:43,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538775073] [2024-09-25 00:13:43,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:13:43,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:13:43,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:13:43,674 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:13:43,676 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-25 00:13:44,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-25 00:13:44,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:13:44,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-09-25 00:13:44,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:13:44,633 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 23 treesize of output 19 [2024-09-25 00:13:44,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:13:44,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:13:44,702 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 23 treesize of output 19 [2024-09-25 00:13:44,720 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 23 treesize of output 19 [2024-09-25 00:13:44,737 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 23 treesize of output 19 [2024-09-25 00:13:44,754 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 23 treesize of output 19 [2024-09-25 00:13:44,770 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 23 treesize of output 19 [2024-09-25 00:13:44,786 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 23 treesize of output 19 [2024-09-25 00:13:45,136 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 23 treesize of output 3 [2024-09-25 00:13:45,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:13:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-09-25 00:13:45,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:13:45,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2024-09-25 00:13:45,975 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 206 treesize of output 194 [2024-09-25 00:13:45,981 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 194 treesize of output 182 [2024-09-25 00:13:46,001 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 176 treesize of output 164 [2024-09-25 00:13:46,040 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 158 treesize of output 146 [2024-09-25 00:13:46,066 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 146 treesize of output 134 [2024-09-25 00:13:46,091 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 134 treesize of output 122 [2024-09-25 00:13:46,120 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 122 treesize of output 110 [2024-09-25 00:13:46,149 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 110 treesize of output 98 [2024-09-25 00:13:47,220 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 78 treesize of output 74 [2024-09-25 00:13:47,225 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 72 treesize of output 68 [2024-09-25 00:13:47,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2024-09-25 00:13:47,234 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 56 [2024-09-25 00:13:47,239 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 54 treesize of output 50 [2024-09-25 00:13:47,244 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 44 [2024-09-25 00:13:47,250 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 42 treesize of output 38 [2024-09-25 00:13:47,256 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 36 treesize of output 32 [2024-09-25 00:13:47,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538775073] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:47,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:13:47,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2024-09-25 00:13:47,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217542517] [2024-09-25 00:13:47,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:13:47,370 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-25 00:13:47,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:13:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-25 00:13:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 00:13:47,370 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 31 states have internal predecessors, (39), 7 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (21), 21 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-25 00:13:47,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:13:47,507 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-25 00:13:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 00:13:47,508 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 31 states have internal predecessors, (39), 7 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (21), 21 states have call predecessors, (21), 7 states have call successors, (21) Word has length 60 [2024-09-25 00:13:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:13:47,509 INFO L225 Difference]: With dead ends: 46 [2024-09-25 00:13:47,509 INFO L226 Difference]: Without dead ends: 41 [2024-09-25 00:13:47,510 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2024-09-25 00:13:47,510 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:13:47,510 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 94 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:13:47,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-25 00:13:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-25 00:13:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-25 00:13:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-09-25 00:13:47,518 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 60 [2024-09-25 00:13:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:13:47,518 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-09-25 00:13:47,518 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 31 states have internal predecessors, (39), 7 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (21), 21 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-25 00:13:47,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-09-25 00:13:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-25 00:13:47,520 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:13:47,520 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:13:47,539 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-25 00:13:47,720 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:13:47,721 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:13:47,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:47,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1924062919, now seen corresponding path program 10 times [2024-09-25 00:13:47,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:13:47,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823083095] [2024-09-25 00:13:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:13:47,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:13:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:49,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:13:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:49,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:13:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:50,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:51,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:52,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:53,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:53,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:53,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:54,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:54,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:54,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:54,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 26 proven. 120 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2024-09-25 00:13:54,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:13:54,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823083095] [2024-09-25 00:13:54,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823083095] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:54,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462600821] [2024-09-25 00:13:54,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:13:54,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:13:54,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:13:54,891 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:13:54,892 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-25 00:13:55,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:13:55,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:13:55,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-09-25 00:13:55,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:13:55,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:13:55,449 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 23 treesize of output 19 [2024-09-25 00:13:55,474 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 23 treesize of output 19 [2024-09-25 00:13:55,499 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 23 treesize of output 19 [2024-09-25 00:13:55,525 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 23 treesize of output 19 [2024-09-25 00:13:55,550 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 23 treesize of output 19 [2024-09-25 00:13:55,576 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 23 treesize of output 19 [2024-09-25 00:13:55,603 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 23 treesize of output 19 [2024-09-25 00:13:55,629 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 23 treesize of output 19 [2024-09-25 00:13:55,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:13:56,159 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 23 treesize of output 3 [2024-09-25 00:13:56,186 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 36 treesize of output 24 [2024-09-25 00:13:56,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-25 00:13:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-25 00:13:56,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:13:57,551 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 305 treesize of output 289 [2024-09-25 00:13:57,555 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 289 treesize of output 273 [2024-09-25 00:13:57,563 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 273 treesize of output 257 [2024-09-25 00:13:57,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 241 [2024-09-25 00:13:57,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 225 [2024-09-25 00:13:57,575 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 225 treesize of output 209 [2024-09-25 00:13:57,579 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 209 treesize of output 193 [2024-09-25 00:13:57,582 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 193 treesize of output 177 [2024-09-25 00:13:57,586 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 177 treesize of output 161 [2024-09-25 00:14:00,177 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 97 [2024-09-25 00:14:00,181 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 95 treesize of output 91 [2024-09-25 00:14:00,186 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 89 treesize of output 85 [2024-09-25 00:14:00,191 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 83 treesize of output 79 [2024-09-25 00:14:00,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2024-09-25 00:14:00,202 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 67 [2024-09-25 00:14:00,209 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 65 treesize of output 61 [2024-09-25 00:14:00,217 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 59 treesize of output 55 [2024-09-25 00:14:00,226 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 92 treesize of output 88 [2024-09-25 00:14:01,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462600821] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:01,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:14:01,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 37 [2024-09-25 00:14:01,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977221023] [2024-09-25 00:14:01,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:14:01,459 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-25 00:14:01,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:01,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-25 00:14:01,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 00:14:01,460 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 8 states have call successors, (9), 4 states have call predecessors, (9), 22 states have return successors, (23), 23 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-25 00:14:01,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:01,677 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2024-09-25 00:14:01,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 00:14:01,678 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 8 states have call successors, (9), 4 states have call predecessors, (9), 22 states have return successors, (23), 23 states have call predecessors, (23), 8 states have call successors, (23) Word has length 64 [2024-09-25 00:14:01,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:01,680 INFO L225 Difference]: With dead ends: 47 [2024-09-25 00:14:01,680 INFO L226 Difference]: Without dead ends: 45 [2024-09-25 00:14:01,680 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 00:14:01,681 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:01,681 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 123 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:14:01,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-25 00:14:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-25 00:14:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 13 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-25 00:14:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2024-09-25 00:14:01,688 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 64 [2024-09-25 00:14:01,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:01,688 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2024-09-25 00:14:01,688 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 8 states have call successors, (9), 4 states have call predecessors, (9), 22 states have return successors, (23), 23 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-25 00:14:01,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2024-09-25 00:14:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-25 00:14:01,689 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:01,689 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:01,704 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-25 00:14:01,893 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-25 00:14:01,894 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:01,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:01,894 INFO L85 PathProgramCache]: Analyzing trace with hash 483594709, now seen corresponding path program 10 times [2024-09-25 00:14:01,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:01,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823452965] [2024-09-25 00:14:01,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:01,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:03,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:14:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:03,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:14:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:04,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:05,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:06,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:06,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:07,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:07,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:07,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:07,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:07,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:07,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 18 proven. 120 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-25 00:14:07,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:07,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823452965] [2024-09-25 00:14:07,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823452965] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:07,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597518702] [2024-09-25 00:14:07,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:14:07,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:07,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:07,940 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:14:07,941 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-25 00:14:08,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:14:08,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:14:08,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-09-25 00:14:08,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:08,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:14:08,419 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 23 treesize of output 19 [2024-09-25 00:14:08,433 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 23 treesize of output 19 [2024-09-25 00:14:08,446 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 23 treesize of output 19 [2024-09-25 00:14:08,459 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 23 treesize of output 19 [2024-09-25 00:14:08,472 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 23 treesize of output 19 [2024-09-25 00:14:08,486 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 23 treesize of output 19 [2024-09-25 00:14:08,499 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 23 treesize of output 19 [2024-09-25 00:14:08,529 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 23 treesize of output 19 [2024-09-25 00:14:08,546 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 23 treesize of output 19 [2024-09-25 00:14:08,841 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 23 treesize of output 3 [2024-09-25 00:14:08,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:14:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-25 00:14:08,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:14:09,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2024-09-25 00:14:09,597 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 227 treesize of output 215 [2024-09-25 00:14:09,603 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 215 treesize of output 203 [2024-09-25 00:14:09,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2024-09-25 00:14:09,621 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 191 treesize of output 179 [2024-09-25 00:14:09,633 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 179 treesize of output 167 [2024-09-25 00:14:09,646 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 167 treesize of output 155 [2024-09-25 00:14:09,680 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 149 treesize of output 137 [2024-09-25 00:14:09,784 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 113 [2024-09-25 00:14:09,879 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 95 [2024-09-25 00:14:11,325 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 85 treesize of output 81 [2024-09-25 00:14:11,333 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 75 [2024-09-25 00:14:11,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2024-09-25 00:14:11,342 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 63 [2024-09-25 00:14:11,348 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 57 [2024-09-25 00:14:11,353 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 55 treesize of output 51 [2024-09-25 00:14:11,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2024-09-25 00:14:11,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2024-09-25 00:14:11,372 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 33 [2024-09-25 00:14:11,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597518702] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:11,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:14:11,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2024-09-25 00:14:11,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392573732] [2024-09-25 00:14:11,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:14:11,493 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-25 00:14:11,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:11,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-25 00:14:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 00:14:11,494 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 35 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 33 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 22 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-25 00:14:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:11,676 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-09-25 00:14:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 00:14:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 33 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 22 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) Word has length 65 [2024-09-25 00:14:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:11,680 INFO L225 Difference]: With dead ends: 48 [2024-09-25 00:14:11,681 INFO L226 Difference]: Without dead ends: 43 [2024-09-25 00:14:11,681 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 00:14:11,682 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:11,685 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 123 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:14:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-25 00:14:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-25 00:14:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-25 00:14:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2024-09-25 00:14:11,691 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 65 [2024-09-25 00:14:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:11,692 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2024-09-25 00:14:11,692 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 33 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 22 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-25 00:14:11,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2024-09-25 00:14:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-25 00:14:11,698 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:11,698 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:11,713 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-25 00:14:11,899 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-25 00:14:11,903 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:11,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1448668344, now seen corresponding path program 11 times [2024-09-25 00:14:11,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:11,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058438110] [2024-09-25 00:14:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:11,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:13,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:14:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:13,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:14:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:14,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:16,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:17,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:18,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:18,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:19,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:19,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:20,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:20,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:20,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:20,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 29 proven. 143 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-09-25 00:14:20,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:20,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058438110] [2024-09-25 00:14:20,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058438110] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:20,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032370294] [2024-09-25 00:14:20,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:14:20,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:20,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:20,621 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:14:20,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-25 00:14:24,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-25 00:14:24,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:14:24,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 237 conjuncts are in the unsatisfiable core [2024-09-25 00:14:24,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:24,260 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 23 treesize of output 19 [2024-09-25 00:14:24,308 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 23 treesize of output 19 [2024-09-25 00:14:24,331 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 23 treesize of output 19 [2024-09-25 00:14:24,354 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 23 treesize of output 19 [2024-09-25 00:14:24,380 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 23 treesize of output 19 [2024-09-25 00:14:24,407 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 23 treesize of output 19 [2024-09-25 00:14:24,432 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 23 treesize of output 19 [2024-09-25 00:14:24,457 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 23 treesize of output 19 [2024-09-25 00:14:24,483 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 23 treesize of output 19 [2024-09-25 00:14:24,509 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 23 treesize of output 19 [2024-09-25 00:14:24,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:14:25,061 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 23 treesize of output 3 [2024-09-25 00:14:25,086 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 36 treesize of output 24 [2024-09-25 00:14:25,087 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 28 treesize of output 16 [2024-09-25 00:14:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 11 proven. 153 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-25 00:14:25,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:14:26,570 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 333 treesize of output 317 [2024-09-25 00:14:26,574 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 317 treesize of output 301 [2024-09-25 00:14:26,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 301 treesize of output 285 [2024-09-25 00:14:26,580 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 285 treesize of output 269 [2024-09-25 00:14:26,583 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 269 treesize of output 253 [2024-09-25 00:14:26,586 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 253 treesize of output 237 [2024-09-25 00:14:26,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 221 [2024-09-25 00:14:26,593 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 221 treesize of output 205 [2024-09-25 00:14:26,596 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 205 treesize of output 189 [2024-09-25 00:14:26,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 173 [2024-09-25 00:14:29,893 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 104 [2024-09-25 00:14:29,899 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 102 treesize of output 98 [2024-09-25 00:14:29,904 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 96 treesize of output 92 [2024-09-25 00:14:29,909 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 90 treesize of output 86 [2024-09-25 00:14:29,916 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 84 treesize of output 80 [2024-09-25 00:14:29,922 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 78 treesize of output 74 [2024-09-25 00:14:29,930 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 72 treesize of output 68 [2024-09-25 00:14:29,940 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 66 treesize of output 62 [2024-09-25 00:14:29,949 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 56 [2024-09-25 00:14:29,959 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 94 treesize of output 90 [2024-09-25 00:14:31,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032370294] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:31,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:14:31,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 39 [2024-09-25 00:14:31,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266759461] [2024-09-25 00:14:31,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:14:31,372 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-25 00:14:31,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:31,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-25 00:14:31,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 00:14:31,373 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 39 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (9), 4 states have call predecessors, (9), 24 states have return successors, (25), 25 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-25 00:14:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:31,599 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-09-25 00:14:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 00:14:31,600 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (9), 4 states have call predecessors, (9), 24 states have return successors, (25), 25 states have call predecessors, (25), 8 states have call successors, (25) Word has length 69 [2024-09-25 00:14:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:31,601 INFO L225 Difference]: With dead ends: 49 [2024-09-25 00:14:31,601 INFO L226 Difference]: Without dead ends: 47 [2024-09-25 00:14:31,602 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=441, Invalid=1911, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 00:14:31,602 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:31,602 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 125 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:14:31,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-25 00:14:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-25 00:14:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 14 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-25 00:14:31,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2024-09-25 00:14:31,607 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 69 [2024-09-25 00:14:31,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:31,608 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2024-09-25 00:14:31,608 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (9), 4 states have call predecessors, (9), 24 states have return successors, (25), 25 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-25 00:14:31,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:31,608 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2024-09-25 00:14:31,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-25 00:14:31,608 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:31,608 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:31,658 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-25 00:14:31,809 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:31,809 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:31,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1959048758, now seen corresponding path program 11 times [2024-09-25 00:14:31,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:31,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012495272] [2024-09-25 00:14:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:31,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:33,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:14:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:33,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:14:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:34,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:35,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:36,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:37,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:38,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:38,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:38,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:39,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:39,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:39,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:39,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 20 proven. 143 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-09-25 00:14:39,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:39,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012495272] [2024-09-25 00:14:39,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012495272] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:39,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746414856] [2024-09-25 00:14:39,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:14:39,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:39,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:39,540 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:14:39,541 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-25 00:14:41,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-25 00:14:41,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:14:41,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-09-25 00:14:41,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:41,909 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 23 treesize of output 19 [2024-09-25 00:14:41,942 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 23 treesize of output 19 [2024-09-25 00:14:41,958 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 23 treesize of output 19 [2024-09-25 00:14:41,974 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 23 treesize of output 19 [2024-09-25 00:14:41,990 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 23 treesize of output 19 [2024-09-25 00:14:42,007 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 23 treesize of output 19 [2024-09-25 00:14:42,022 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 23 treesize of output 19 [2024-09-25 00:14:42,038 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 23 treesize of output 19 [2024-09-25 00:14:42,054 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 23 treesize of output 19 [2024-09-25 00:14:42,071 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 23 treesize of output 19 [2024-09-25 00:14:42,086 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 23 treesize of output 19 [2024-09-25 00:14:42,435 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 23 treesize of output 3 [2024-09-25 00:14:42,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:14:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2024-09-25 00:14:42,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:14:43,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 83 [2024-09-25 00:14:43,287 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 248 treesize of output 236 [2024-09-25 00:14:43,294 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 236 treesize of output 224 [2024-09-25 00:14:43,304 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 224 treesize of output 212 [2024-09-25 00:14:43,315 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 212 treesize of output 200 [2024-09-25 00:14:43,376 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 188 treesize of output 176 [2024-09-25 00:14:43,446 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 170 treesize of output 158 [2024-09-25 00:14:43,492 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 158 treesize of output 146 [2024-09-25 00:14:43,539 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 146 treesize of output 134 [2024-09-25 00:14:43,586 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 134 treesize of output 122 [2024-09-25 00:14:43,635 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 122 treesize of output 110 [2024-09-25 00:14:45,440 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 92 treesize of output 88 [2024-09-25 00:14:45,445 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 86 treesize of output 82 [2024-09-25 00:14:45,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2024-09-25 00:14:45,455 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 74 treesize of output 70 [2024-09-25 00:14:45,461 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 68 treesize of output 64 [2024-09-25 00:14:45,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2024-09-25 00:14:45,472 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 52 [2024-09-25 00:14:45,478 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 46 [2024-09-25 00:14:45,485 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 44 treesize of output 40 [2024-09-25 00:14:45,492 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 38 treesize of output 34 [2024-09-25 00:14:45,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746414856] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:45,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:14:45,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 37 [2024-09-25 00:14:45,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534246932] [2024-09-25 00:14:45,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:14:45,654 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-25 00:14:45,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-25 00:14:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 00:14:45,655 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 37 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 7 states have call successors, (8), 3 states have call predecessors, (8), 24 states have return successors, (25), 25 states have call predecessors, (25), 7 states have call successors, (25) [2024-09-25 00:14:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:45,809 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2024-09-25 00:14:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 00:14:45,810 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 7 states have call successors, (8), 3 states have call predecessors, (8), 24 states have return successors, (25), 25 states have call predecessors, (25), 7 states have call successors, (25) Word has length 70 [2024-09-25 00:14:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:45,811 INFO L225 Difference]: With dead ends: 50 [2024-09-25 00:14:45,811 INFO L226 Difference]: Without dead ends: 45 [2024-09-25 00:14:45,811 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=511, Invalid=1651, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 00:14:45,812 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:45,812 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 98 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:14:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-25 00:14:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-25 00:14:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-25 00:14:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-25 00:14:45,817 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2024-09-25 00:14:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:45,817 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-25 00:14:45,817 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 7 states have call successors, (8), 3 states have call predecessors, (8), 24 states have return successors, (25), 25 states have call predecessors, (25), 7 states have call successors, (25) [2024-09-25 00:14:45,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-25 00:14:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-25 00:14:45,818 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:45,818 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:14:45,838 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-25 00:14:46,022 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-25 00:14:46,023 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:46,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash 918502793, now seen corresponding path program 12 times [2024-09-25 00:14:46,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:46,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421550529] [2024-09-25 00:14:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:46,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:48,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:14:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:48,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:14:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:49,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:51,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:53,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:54,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:55,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:55,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:56,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:56,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:57,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:57,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:57,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:57,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:14:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 32 proven. 168 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2024-09-25 00:14:57,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:57,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421550529] [2024-09-25 00:14:57,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421550529] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:57,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355993800] [2024-09-25 00:14:57,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 00:14:57,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:57,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:57,725 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:14:57,726 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-25 00:14:59,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-25 00:14:59,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:14:59,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 307 conjuncts are in the unsatisfiable core [2024-09-25 00:14:59,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:59,825 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 23 treesize of output 19 [2024-09-25 00:14:59,887 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 23 treesize of output 19 [2024-09-25 00:14:59,918 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 23 treesize of output 19 [2024-09-25 00:14:59,948 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 23 treesize of output 19 [2024-09-25 00:14:59,978 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 23 treesize of output 19 [2024-09-25 00:15:00,009 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 23 treesize of output 19 [2024-09-25 00:15:00,039 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 23 treesize of output 19 [2024-09-25 00:15:00,070 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 23 treesize of output 19 [2024-09-25 00:15:00,100 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 23 treesize of output 19 [2024-09-25 00:15:00,131 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 23 treesize of output 19 [2024-09-25 00:15:00,161 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 23 treesize of output 19 [2024-09-25 00:15:00,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:15:00,821 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 23 treesize of output 3 [2024-09-25 00:15:00,853 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 36 treesize of output 24 [2024-09-25 00:15:00,854 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 28 treesize of output 16 [2024-09-25 00:15:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-25 00:15:00,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:15:02,924 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 361 treesize of output 345 [2024-09-25 00:15:02,927 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 345 treesize of output 329 [2024-09-25 00:15:02,931 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 329 treesize of output 313 [2024-09-25 00:15:02,934 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 313 treesize of output 297 [2024-09-25 00:15:02,937 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 297 treesize of output 281 [2024-09-25 00:15:02,940 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 281 treesize of output 265 [2024-09-25 00:15:02,943 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 265 treesize of output 249 [2024-09-25 00:15:02,946 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 249 treesize of output 233 [2024-09-25 00:15:02,949 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 233 treesize of output 217 [2024-09-25 00:15:02,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 201 [2024-09-25 00:15:02,955 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 201 treesize of output 185 [2024-09-25 00:15:07,115 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 115 treesize of output 111 [2024-09-25 00:15:07,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 105 [2024-09-25 00:15:07,125 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 103 treesize of output 99 [2024-09-25 00:15:07,131 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 93 [2024-09-25 00:15:07,138 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 87 [2024-09-25 00:15:07,145 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 85 treesize of output 81 [2024-09-25 00:15:07,152 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 75 [2024-09-25 00:15:07,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2024-09-25 00:15:07,168 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 63 [2024-09-25 00:15:07,177 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 57 [2024-09-25 00:15:07,187 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 96 treesize of output 92 [2024-09-25 00:15:08,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355993800] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:08,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:15:08,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2024-09-25 00:15:08,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877738831] [2024-09-25 00:15:08,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:15:08,978 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-25 00:15:08,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:15:08,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-25 00:15:08,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 00:15:08,981 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 42 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 8 states have call successors, (9), 4 states have call predecessors, (9), 26 states have return successors, (27), 27 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-25 00:15:09,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:15:09,259 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2024-09-25 00:15:09,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 00:15:09,263 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 8 states have call successors, (9), 4 states have call predecessors, (9), 26 states have return successors, (27), 27 states have call predecessors, (27), 8 states have call successors, (27) Word has length 74 [2024-09-25 00:15:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:15:09,268 INFO L225 Difference]: With dead ends: 51 [2024-09-25 00:15:09,268 INFO L226 Difference]: Without dead ends: 49 [2024-09-25 00:15:09,269 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=498, Invalid=2154, Unknown=0, NotChecked=0, Total=2652 [2024-09-25 00:15:09,269 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:15:09,270 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 141 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:15:09,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-25 00:15:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-25 00:15:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 15 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2024-09-25 00:15:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2024-09-25 00:15:09,280 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 74 [2024-09-25 00:15:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:15:09,281 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2024-09-25 00:15:09,281 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 8 states have call successors, (9), 4 states have call predecessors, (9), 26 states have return successors, (27), 27 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-25 00:15:09,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2024-09-25 00:15:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-09-25 00:15:09,281 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:15:09,281 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:15:09,308 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-25 00:15:09,482 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-25 00:15:09,482 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:15:09,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1591181435, now seen corresponding path program 12 times [2024-09-25 00:15:09,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:15:09,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257012193] [2024-09-25 00:15:09,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:15:09,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:15:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:11,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:15:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:11,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:15:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:12,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:14,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:15,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:15,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:16,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:17,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:17,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:17,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:18,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:18,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:18,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:18,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 22 proven. 168 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-25 00:15:18,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:15:18,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257012193] [2024-09-25 00:15:18,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257012193] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:18,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507404149] [2024-09-25 00:15:18,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 00:15:18,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:15:18,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:15:18,594 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:15:18,595 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-25 00:15:20,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-25 00:15:20,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:15:20,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 255 conjuncts are in the unsatisfiable core [2024-09-25 00:15:20,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:15:20,395 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 23 treesize of output 19 [2024-09-25 00:15:20,440 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 23 treesize of output 19 [2024-09-25 00:15:20,465 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 23 treesize of output 19 [2024-09-25 00:15:20,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:15:20,515 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 23 treesize of output 19 [2024-09-25 00:15:20,541 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 23 treesize of output 19 [2024-09-25 00:15:20,569 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 23 treesize of output 19 [2024-09-25 00:15:20,595 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 23 treesize of output 19 [2024-09-25 00:15:20,620 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 23 treesize of output 19 [2024-09-25 00:15:20,645 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 23 treesize of output 19 [2024-09-25 00:15:20,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:15:20,702 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 23 treesize of output 19 [2024-09-25 00:15:21,158 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 23 treesize of output 3 [2024-09-25 00:15:21,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:15:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-25 00:15:21,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:15:22,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 90 [2024-09-25 00:15:22,578 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 269 treesize of output 257 [2024-09-25 00:15:22,585 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 257 treesize of output 245 [2024-09-25 00:15:22,638 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 928 treesize of output 880 [2024-09-25 00:15:22,647 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 880 treesize of output 832 [2024-09-25 00:15:22,656 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 832 treesize of output 784 [2024-09-25 00:15:22,664 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 784 treesize of output 736 [2024-09-25 00:15:22,673 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 736 treesize of output 688 [2024-09-25 00:15:22,681 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 688 treesize of output 640 [2024-09-25 00:15:22,689 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 640 treesize of output 592 [2024-09-25 00:15:22,697 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 592 treesize of output 544 [2024-09-25 00:15:22,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 544 treesize of output 496 [2024-09-25 00:15:30,992 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 99 treesize of output 95 [2024-09-25 00:15:30,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 89 [2024-09-25 00:15:31,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 83 [2024-09-25 00:15:31,005 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 81 treesize of output 77 [2024-09-25 00:15:31,013 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 75 treesize of output 71 [2024-09-25 00:15:31,020 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 65 [2024-09-25 00:15:31,026 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 59 [2024-09-25 00:15:31,032 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 57 treesize of output 53 [2024-09-25 00:15:31,038 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 47 [2024-09-25 00:15:31,045 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 41 [2024-09-25 00:15:31,053 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 35 [2024-09-25 00:15:31,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507404149] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:31,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:15:31,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 41 [2024-09-25 00:15:31,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996831145] [2024-09-25 00:15:31,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:15:31,212 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-25 00:15:31,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:15:31,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-25 00:15:31,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=1532, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 00:15:31,214 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 39 states have internal predecessors, (46), 7 states have call successors, (8), 3 states have call predecessors, (8), 26 states have return successors, (27), 27 states have call predecessors, (27), 7 states have call successors, (27) [2024-09-25 00:15:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:15:31,383 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-25 00:15:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 00:15:31,383 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 39 states have internal predecessors, (46), 7 states have call successors, (8), 3 states have call predecessors, (8), 26 states have return successors, (27), 27 states have call predecessors, (27), 7 states have call successors, (27) Word has length 75 [2024-09-25 00:15:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:15:31,384 INFO L225 Difference]: With dead ends: 52 [2024-09-25 00:15:31,384 INFO L226 Difference]: Without dead ends: 47 [2024-09-25 00:15:31,387 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=633, Invalid=1917, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 00:15:31,388 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:15:31,389 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 96 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:15:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-25 00:15:31,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-25 00:15:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-25 00:15:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2024-09-25 00:15:31,405 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2024-09-25 00:15:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:15:31,406 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2024-09-25 00:15:31,406 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 39 states have internal predecessors, (46), 7 states have call successors, (8), 3 states have call predecessors, (8), 26 states have return successors, (27), 27 states have call predecessors, (27), 7 states have call successors, (27) [2024-09-25 00:15:31,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:31,406 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2024-09-25 00:15:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-25 00:15:31,407 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:15:31,407 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:15:31,427 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-25 00:15:31,607 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-25 00:15:31,608 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:15:31,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2044587960, now seen corresponding path program 13 times [2024-09-25 00:15:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:15:31,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185327325] [2024-09-25 00:15:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:15:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:15:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:34,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:15:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:34,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:15:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:36,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:38,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:40,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:41,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:42,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:43,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:44,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:44,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:45,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:45,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:45,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:46,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:46,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:15:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 35 proven. 195 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2024-09-25 00:15:46,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:15:46,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185327325] [2024-09-25 00:15:46,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185327325] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:46,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144421523] [2024-09-25 00:15:46,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 00:15:46,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:15:46,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:15:46,240 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:15:46,242 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-25 00:15:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:47,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 329 conjuncts are in the unsatisfiable core [2024-09-25 00:15:47,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:15:47,673 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 23 treesize of output 19 [2024-09-25 00:15:47,739 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 23 treesize of output 19 [2024-09-25 00:15:47,771 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 23 treesize of output 19 [2024-09-25 00:15:47,802 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 23 treesize of output 19 [2024-09-25 00:15:47,834 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 23 treesize of output 19 [2024-09-25 00:15:47,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:15:47,896 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 23 treesize of output 19 [2024-09-25 00:15:47,926 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 23 treesize of output 19 [2024-09-25 00:15:47,957 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 23 treesize of output 19 [2024-09-25 00:15:47,990 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 23 treesize of output 19 [2024-09-25 00:15:48,022 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 23 treesize of output 19 [2024-09-25 00:15:48,055 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 23 treesize of output 19 [2024-09-25 00:15:48,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:15:48,811 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 23 treesize of output 3 [2024-09-25 00:15:48,843 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 36 treesize of output 24 [2024-09-25 00:15:48,844 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 28 treesize of output 16 [2024-09-25 00:15:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 13 proven. 219 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-25 00:15:48,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:15:51,137 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 389 treesize of output 373 [2024-09-25 00:15:51,141 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 373 treesize of output 357 [2024-09-25 00:15:51,144 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 357 treesize of output 341 [2024-09-25 00:15:51,147 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 341 treesize of output 325 [2024-09-25 00:15:51,150 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 325 treesize of output 309 [2024-09-25 00:15:51,154 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 309 treesize of output 293 [2024-09-25 00:15:51,157 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 293 treesize of output 277 [2024-09-25 00:15:51,160 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 277 treesize of output 261 [2024-09-25 00:15:51,163 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 261 treesize of output 245 [2024-09-25 00:15:51,167 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 245 treesize of output 229 [2024-09-25 00:15:51,170 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 229 treesize of output 213 [2024-09-25 00:15:51,173 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 213 treesize of output 197 [2024-09-25 00:15:56,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 118 [2024-09-25 00:15:56,802 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 116 treesize of output 112 [2024-09-25 00:15:56,808 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 110 treesize of output 106 [2024-09-25 00:15:56,813 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 104 treesize of output 100 [2024-09-25 00:15:56,820 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 94 [2024-09-25 00:15:56,828 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 92 treesize of output 88 [2024-09-25 00:15:56,836 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 86 treesize of output 82 [2024-09-25 00:15:56,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2024-09-25 00:15:56,855 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 74 treesize of output 70 [2024-09-25 00:15:56,864 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 68 treesize of output 64 [2024-09-25 00:15:56,875 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 58 [2024-09-25 00:15:56,886 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 94 [2024-09-25 00:15:58,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144421523] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:58,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:15:58,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 44 [2024-09-25 00:15:58,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092839658] [2024-09-25 00:15:58,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:15:58,879 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-25 00:15:58,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:15:58,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-25 00:15:58,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1844, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 00:15:58,880 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 44 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 8 states have call successors, (9), 4 states have call predecessors, (9), 28 states have return successors, (29), 29 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-25 00:15:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:15:59,151 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2024-09-25 00:15:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-25 00:15:59,152 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 8 states have call successors, (9), 4 states have call predecessors, (9), 28 states have return successors, (29), 29 states have call predecessors, (29), 8 states have call successors, (29) Word has length 79 [2024-09-25 00:15:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:15:59,152 INFO L225 Difference]: With dead ends: 53 [2024-09-25 00:15:59,152 INFO L226 Difference]: Without dead ends: 51 [2024-09-25 00:15:59,153 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=544, Invalid=2212, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 00:15:59,153 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:15:59,153 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 170 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:15:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-25 00:15:59,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-25 00:15:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 16 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-25 00:15:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2024-09-25 00:15:59,159 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 79 [2024-09-25 00:15:59,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:15:59,159 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2024-09-25 00:15:59,159 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 8 states have call successors, (9), 4 states have call predecessors, (9), 28 states have return successors, (29), 29 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-25 00:15:59,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2024-09-25 00:15:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-25 00:15:59,160 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:15:59,160 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:15:59,181 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-25 00:15:59,364 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-25 00:15:59,365 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:15:59,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:59,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1042285734, now seen corresponding path program 13 times [2024-09-25 00:15:59,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:15:59,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529523870] [2024-09-25 00:15:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:15:59,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:15:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:01,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:16:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:01,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:16:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:03,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:04,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:05,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:06,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:07,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:08,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:09,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:09,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:09,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:10,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:10,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:10,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:10,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 24 proven. 195 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-25 00:16:10,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:16:10,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529523870] [2024-09-25 00:16:10,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529523870] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:16:10,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436167010] [2024-09-25 00:16:10,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 00:16:10,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:16:10,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:16:10,623 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:16:10,624 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-25 00:16:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:11,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 165 conjuncts are in the unsatisfiable core [2024-09-25 00:16:11,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:16:11,549 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 23 treesize of output 19 [2024-09-25 00:16:11,582 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 23 treesize of output 19 [2024-09-25 00:16:11,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:16:11,615 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 23 treesize of output 19 [2024-09-25 00:16:11,632 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 23 treesize of output 19 [2024-09-25 00:16:11,650 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 23 treesize of output 19 [2024-09-25 00:16:11,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:16:11,682 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 23 treesize of output 19 [2024-09-25 00:16:11,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-09-25 00:16:11,715 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 23 treesize of output 19 [2024-09-25 00:16:11,732 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 23 treesize of output 19 [2024-09-25 00:16:11,748 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 23 treesize of output 19 [2024-09-25 00:16:11,763 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 23 treesize of output 19 [2024-09-25 00:16:12,193 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 23 treesize of output 3 [2024-09-25 00:16:12,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:16:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-09-25 00:16:12,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:16:13,244 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 97 [2024-09-25 00:16:13,265 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 290 treesize of output 278 [2024-09-25 00:16:13,289 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 272 treesize of output 260 [2024-09-25 00:16:13,308 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 260 treesize of output 248 [2024-09-25 00:16:13,329 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 248 treesize of output 236 [2024-09-25 00:16:13,352 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 236 treesize of output 224 [2024-09-25 00:16:13,408 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 218 treesize of output 206 [2024-09-25 00:16:13,445 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 206 treesize of output 194 [2024-09-25 00:16:13,534 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 188 treesize of output 176 [2024-09-25 00:16:13,589 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 176 treesize of output 164 [2024-09-25 00:16:13,644 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 164 treesize of output 152 [2024-09-25 00:16:13,833 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 146 treesize of output 134 [2024-09-25 00:16:14,110 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 122 treesize of output 110 [2024-09-25 00:16:16,154 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 106 treesize of output 102 [2024-09-25 00:16:16,164 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 100 treesize of output 96 [2024-09-25 00:16:16,174 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 94 treesize of output 90 [2024-09-25 00:16:16,181 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 88 treesize of output 84 [2024-09-25 00:16:16,187 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 82 treesize of output 78 [2024-09-25 00:16:16,193 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 76 treesize of output 72 [2024-09-25 00:16:16,200 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 70 treesize of output 66 [2024-09-25 00:16:16,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2024-09-25 00:16:16,217 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 58 treesize of output 54 [2024-09-25 00:16:16,227 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 48 [2024-09-25 00:16:16,237 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 46 treesize of output 42 [2024-09-25 00:16:16,246 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 40 treesize of output 36 [2024-09-25 00:16:16,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436167010] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:16:16,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:16:16,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 41 [2024-09-25 00:16:16,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457494914] [2024-09-25 00:16:16,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:16:16,451 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-25 00:16:16,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:16:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-25 00:16:16,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=523, Invalid=1547, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 00:16:16,452 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 41 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 39 states have internal predecessors, (47), 7 states have call successors, (8), 3 states have call predecessors, (8), 28 states have return successors, (29), 29 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-25 00:16:16,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:16:16,617 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2024-09-25 00:16:16,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 00:16:16,618 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 39 states have internal predecessors, (47), 7 states have call successors, (8), 3 states have call predecessors, (8), 28 states have return successors, (29), 29 states have call predecessors, (29), 7 states have call successors, (29) Word has length 80 [2024-09-25 00:16:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:16:16,622 INFO L225 Difference]: With dead ends: 54 [2024-09-25 00:16:16,622 INFO L226 Difference]: Without dead ends: 49 [2024-09-25 00:16:16,623 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=620, Invalid=1930, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 00:16:16,624 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:16:16,624 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:16:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-25 00:16:16,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-25 00:16:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2024-09-25 00:16:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2024-09-25 00:16:16,634 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 80 [2024-09-25 00:16:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:16:16,636 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2024-09-25 00:16:16,636 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 39 states have internal predecessors, (47), 7 states have call successors, (8), 3 states have call predecessors, (8), 28 states have return successors, (29), 29 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-25 00:16:16,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2024-09-25 00:16:16,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-25 00:16:16,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:16:16,640 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:16:16,658 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-25 00:16:16,840 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:16:16,840 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:16:16,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:16,841 INFO L85 PathProgramCache]: Analyzing trace with hash -136058407, now seen corresponding path program 14 times [2024-09-25 00:16:16,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:16:16,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242322406] [2024-09-25 00:16:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:16:16,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:16:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:20,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:16:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:20,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 00:16:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:23,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:25,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:16:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat