./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:53:17,837 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:53:17,901 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:53:17,908 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:53:17,909 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:53:17,927 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:53:17,928 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:53:17,928 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:53:17,929 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:53:17,931 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:53:17,931 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:53:17,931 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:53:17,932 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:53:17,932 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:53:17,932 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:53:17,933 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:53:17,935 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:53:17,935 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:53:17,935 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:53:17,935 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:53:17,936 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:53:17,936 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:53:17,936 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:53:17,936 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:53:17,937 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:53:17,937 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:53:17,939 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:53:17,939 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:53:17,940 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:53:17,940 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:53:17,940 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:53:17,940 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:53:17,940 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:53:17,940 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:53:17,941 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:53:17,941 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:53:17,941 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:53:17,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:53:17,941 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:53:17,941 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:53:17,942 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:53:17,942 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:53:17,942 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:53:18,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:53:18,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:53:18,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:53:18,240 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:53:18,240 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:53:18,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-09-15 19:53:19,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:53:19,751 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:53:19,752 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-09-15 19:53:19,759 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/8cb03811f/47d83741eef24231a1c870bef629fbe1/FLAGa833b4528 [2024-09-15 19:53:19,772 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/8cb03811f/47d83741eef24231a1c870bef629fbe1 [2024-09-15 19:53:19,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:53:19,776 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:53:19,778 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:53:19,778 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:53:19,785 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:53:19,787 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:19,788 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cdaad92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19, skipping insertion in model container [2024-09-15 19:53:19,788 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:19,808 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:53:19,919 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c[1019,1032] [2024-09-15 19:53:19,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:53:19,942 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:53:19,951 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c[1019,1032] [2024-09-15 19:53:19,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:53:19,972 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:53:19,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19 WrapperNode [2024-09-15 19:53:19,973 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:53:19,974 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:53:19,974 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:53:19,974 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:53:19,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:19,986 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:19,993 INFO L138 Inliner]: procedures = 16, calls = 106, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:53:19,994 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:53:19,995 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:53:19,995 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:53:19,995 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:53:20,003 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:20,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:20,007 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:20,047 INFO L175 MemorySlicer]: Split 66 memory accesses to 9 slices as follows [2, 7, 7, 10, 8, 8, 8, 8, 8]. 15 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0]. The 14 writes are split as follows [0, 1, 1, 2, 2, 2, 2, 2, 2]. [2024-09-15 19:53:20,048 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:20,048 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:20,059 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:20,063 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:20,064 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:20,065 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:20,073 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:53:20,074 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:53:20,074 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:53:20,075 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:53:20,076 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (1/1) ... [2024-09-15 19:53:20,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:53:20,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:20,105 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) [2024-09-15 19:53:20,110 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 [2024-09-15 19:53:20,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:53:20,149 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_48_0 [2024-09-15 19:53:20,149 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_48_0 [2024-09-15 19:53:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:53:20,150 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:53:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:53:20,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:53:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:53:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 19:53:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-15 19:53:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-15 19:53:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-15 19:53:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-15 19:53:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-15 19:53:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-15 19:53:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-09-15 19:53:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-15 19:53:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-15 19:53:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-15 19:53:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-15 19:53:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-15 19:53:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-15 19:53:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-15 19:53:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-15 19:53:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-15 19:53:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-09-15 19:53:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:53:20,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:53:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:53:20,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:53:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-15 19:53:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-15 19:53:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-15 19:53:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-15 19:53:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-15 19:53:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-15 19:53:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-15 19:53:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-15 19:53:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-09-15 19:53:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:53:20,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:53:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-15 19:53:20,275 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:53:20,277 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:53:20,487 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-09-15 19:53:20,488 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:53:20,507 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:53:20,507 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-15 19:53:20,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:53:20 BoogieIcfgContainer [2024-09-15 19:53:20,507 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:53:20,509 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:53:20,509 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:53:20,511 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:53:20,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:53:19" (1/3) ... [2024-09-15 19:53:20,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e536004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:53:20, skipping insertion in model container [2024-09-15 19:53:20,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:19" (2/3) ... [2024-09-15 19:53:20,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e536004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:53:20, skipping insertion in model container [2024-09-15 19:53:20,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:53:20" (3/3) ... [2024-09-15 19:53:20,513 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd-ll.c [2024-09-15 19:53:20,524 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:53:20,524 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:53:20,575 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:53:20,580 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;@4a824a83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:53:20,580 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:53:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-15 19:53:20,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 19:53:20,588 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:20,588 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:20,588 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:20,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1455850366, now seen corresponding path program 1 times [2024-09-15 19:53:20,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:20,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573124328] [2024-09-15 19:53:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:20,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:20,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:53:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:20,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:53:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:20,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:53:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:53:20,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:20,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573124328] [2024-09-15 19:53:20,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573124328] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:20,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:20,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:53:20,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467012948] [2024-09-15 19:53:20,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:20,824 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:53:20,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:20,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:53:20,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:53:20,843 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:53:20,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:20,865 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2024-09-15 19:53:20,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:53:20,870 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-15 19:53:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:20,877 INFO L225 Difference]: With dead ends: 84 [2024-09-15 19:53:20,878 INFO L226 Difference]: Without dead ends: 41 [2024-09-15 19:53:20,881 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:53:20,884 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:20,885 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:53:20,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-15 19:53:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-15 19:53:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-15 19:53:20,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2024-09-15 19:53:20,913 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 24 [2024-09-15 19:53:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:20,914 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2024-09-15 19:53:20,914 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:53:20,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2024-09-15 19:53:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 19:53:20,916 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:20,916 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:20,922 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:53:20,923 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:20,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:20,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1951833606, now seen corresponding path program 1 times [2024-09-15 19:53:20,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:20,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495347623] [2024-09-15 19:53:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:20,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:20,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474058858] [2024-09-15 19:53:20,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:20,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:20,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:20,996 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) [2024-09-15 19:53:21,003 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:53:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:21,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-15 19:53:21,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:21,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:21,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:21,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:53:21,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:53:21,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:21,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495347623] [2024-09-15 19:53:21,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474058858] [2024-09-15 19:53:21,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474058858] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:21,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:21,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 19:53:21,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664070302] [2024-09-15 19:53:21,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:21,367 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:53:21,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:21,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:53:21,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:53:21,369 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 19:53:21,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:21,663 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2024-09-15 19:53:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:53:21,664 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-09-15 19:53:21,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:21,667 INFO L225 Difference]: With dead ends: 67 [2024-09-15 19:53:21,668 INFO L226 Difference]: Without dead ends: 65 [2024-09-15 19:53:21,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:53:21,671 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 21 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:21,671 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 217 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:53:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-15 19:53:21,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2024-09-15 19:53:21,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 38 states have internal predecessors, (40), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-15 19:53:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2024-09-15 19:53:21,697 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 24 [2024-09-15 19:53:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:21,697 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2024-09-15 19:53:21,698 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 19:53:21,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2024-09-15 19:53:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-15 19:53:21,699 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:21,699 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:21,718 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:53:21,900 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:21,901 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:21,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:21,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1266928978, now seen corresponding path program 1 times [2024-09-15 19:53:21,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:21,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921680937] [2024-09-15 19:53:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:21,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:21,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252010282] [2024-09-15 19:53:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:21,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:21,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:21,956 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) [2024-09-15 19:53:21,956 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:53:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:22,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-15 19:53:22,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:22,080 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 [2024-09-15 19:53:22,085 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 [2024-09-15 19:53:22,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:22,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:22,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:22,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-15 19:53:22,380 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 26 treesize of output 14 [2024-09-15 19:53:22,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-15 19:53:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:53:22,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:53:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:53:22,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:22,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921680937] [2024-09-15 19:53:22,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:22,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252010282] [2024-09-15 19:53:22,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252010282] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:53:22,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:53:22,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 18 [2024-09-15 19:53:22,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871307000] [2024-09-15 19:53:22,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:22,704 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:53:22,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:53:22,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-15 19:53:22,705 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:53:23,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:23,121 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2024-09-15 19:53:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:53:23,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-09-15 19:53:23,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:23,123 INFO L225 Difference]: With dead ends: 67 [2024-09-15 19:53:23,123 INFO L226 Difference]: Without dead ends: 65 [2024-09-15 19:53:23,123 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-09-15 19:53:23,124 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:23,124 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 225 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:53:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-15 19:53:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2024-09-15 19:53:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.131578947368421) internal successors, (43), 41 states have internal predecessors, (43), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-15 19:53:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2024-09-15 19:53:23,139 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 30 [2024-09-15 19:53:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:23,140 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2024-09-15 19:53:23,140 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:53:23,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2024-09-15 19:53:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-15 19:53:23,141 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:23,141 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:23,154 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:53:23,345 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:23,346 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:23,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:23,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1236409500, now seen corresponding path program 1 times [2024-09-15 19:53:23,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:23,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770322876] [2024-09-15 19:53:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:23,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:23,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024092761] [2024-09-15 19:53:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:23,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:23,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:23,378 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) [2024-09-15 19:53:23,379 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:53:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:23,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-15 19:53:23,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:23,476 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 [2024-09-15 19:53:23,479 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 11 [2024-09-15 19:53:23,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:23,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:23,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:53:23,673 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 15 treesize of output 7 [2024-09-15 19:53:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 19:53:23,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:53:23,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:23,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770322876] [2024-09-15 19:53:23,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:23,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024092761] [2024-09-15 19:53:23,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024092761] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:53:23,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:53:23,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-15 19:53:23,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443557683] [2024-09-15 19:53:23,773 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:53:23,773 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 19:53:23,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:23,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 19:53:23,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:53:23,774 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:53:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:24,031 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2024-09-15 19:53:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 19:53:24,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-15 19:53:24,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:24,033 INFO L225 Difference]: With dead ends: 128 [2024-09-15 19:53:24,033 INFO L226 Difference]: Without dead ends: 126 [2024-09-15 19:53:24,033 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:53:24,034 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:24,034 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 165 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:53:24,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-09-15 19:53:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2024-09-15 19:53:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 75 states have internal predecessors, (81), 28 states have call successors, (28), 14 states have call predecessors, (28), 15 states have return successors, (32), 26 states have call predecessors, (32), 25 states have call successors, (32) [2024-09-15 19:53:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2024-09-15 19:53:24,056 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 36 [2024-09-15 19:53:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:24,057 INFO L474 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2024-09-15 19:53:24,057 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:53:24,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:24,057 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2024-09-15 19:53:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 19:53:24,058 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:24,058 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:24,071 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 19:53:24,259 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:24,259 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:24,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:24,260 INFO L85 PathProgramCache]: Analyzing trace with hash -598293826, now seen corresponding path program 1 times [2024-09-15 19:53:24,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:24,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995624799] [2024-09-15 19:53:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:24,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:24,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:53:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:24,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:53:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:24,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:53:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:24,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 19:53:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:24,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:53:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:24,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:53:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:24,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:53:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 19:53:24,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:24,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995624799] [2024-09-15 19:53:24,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995624799] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:24,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:24,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-09-15 19:53:24,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243161561] [2024-09-15 19:53:24,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:24,686 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 19:53:24,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:24,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 19:53:24,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-15 19:53:24,687 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-15 19:53:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:24,986 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2024-09-15 19:53:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:53:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-15 19:53:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:24,991 INFO L225 Difference]: With dead ends: 127 [2024-09-15 19:53:24,991 INFO L226 Difference]: Without dead ends: 125 [2024-09-15 19:53:24,991 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:53:24,992 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:24,992 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 119 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:53:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-15 19:53:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-09-15 19:53:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 82 states have internal predecessors, (88), 28 states have call successors, (28), 16 states have call predecessors, (28), 18 states have return successors, (33), 26 states have call predecessors, (33), 25 states have call successors, (33) [2024-09-15 19:53:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2024-09-15 19:53:25,052 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 46 [2024-09-15 19:53:25,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:25,054 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2024-09-15 19:53:25,054 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-15 19:53:25,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2024-09-15 19:53:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-15 19:53:25,057 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:25,057 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:25,057 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-15 19:53:25,057 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:25,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:25,057 INFO L85 PathProgramCache]: Analyzing trace with hash 729356253, now seen corresponding path program 1 times [2024-09-15 19:53:25,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:25,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737629162] [2024-09-15 19:53:25,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:25,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:25,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856107598] [2024-09-15 19:53:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:25,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:25,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:25,104 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) [2024-09-15 19:53:25,107 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:53:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:25,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-09-15 19:53:25,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:25,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:25,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:25,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:25,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:25,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-09-15 19:53:25,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:53:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 19:53:25,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:54:02,920 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_33_to_48_0_#t~mem6_7| Int)) (let ((.cse0 (select (select |c_#memory_int#5| c_func_to_recursive_line_33_to_48_0_~s.base) c_func_to_recursive_line_33_to_48_0_~s.offset))) (or (< (select (select |c_#memory_int#4| c_func_to_recursive_line_33_to_48_0_~r.base) c_func_to_recursive_line_33_to_48_0_~r.offset) (+ .cse0 |v_func_to_recursive_line_33_to_48_0_#t~mem6_7|)) (= (let ((.cse1 (select (select |c_#memory_int#8| c_func_to_recursive_line_33_to_48_0_~q.base) c_func_to_recursive_line_33_to_48_0_~q.offset))) (+ (* |v_func_to_recursive_line_33_to_48_0_#t~mem6_7| .cse1) (* .cse0 .cse1) 1)) (* (select (select |c_#memory_int#6| c_func_to_recursive_line_33_to_48_0_~p.base) c_func_to_recursive_line_33_to_48_0_~p.offset) .cse0))))) is different from false [2024-09-15 19:54:03,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:03,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737629162] [2024-09-15 19:54:03,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:54:03,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856107598] [2024-09-15 19:54:03,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856107598] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:54:03,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:54:03,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-15 19:54:03,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107739692] [2024-09-15 19:54:03,019 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:54:03,020 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 19:54:03,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:03,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 19:54:03,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=143, Unknown=8, NotChecked=24, Total=210 [2024-09-15 19:54:03,020 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-15 19:54:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:03,431 INFO L93 Difference]: Finished difference Result 168 states and 198 transitions. [2024-09-15 19:54:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:54:03,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2024-09-15 19:54:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:03,436 INFO L225 Difference]: With dead ends: 168 [2024-09-15 19:54:03,436 INFO L226 Difference]: Without dead ends: 166 [2024-09-15 19:54:03,438 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=61, Invalid=241, Unknown=8, NotChecked=32, Total=342 [2024-09-15 19:54:03,439 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 38 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:03,439 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 293 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:54:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-15 19:54:03,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2024-09-15 19:54:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 107 states have internal predecessors, (114), 36 states have call successors, (36), 21 states have call predecessors, (36), 24 states have return successors, (43), 34 states have call predecessors, (43), 32 states have call successors, (43) [2024-09-15 19:54:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 193 transitions. [2024-09-15 19:54:03,495 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 193 transitions. Word has length 47 [2024-09-15 19:54:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:03,496 INFO L474 AbstractCegarLoop]: Abstraction has 163 states and 193 transitions. [2024-09-15 19:54:03,496 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-15 19:54:03,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 193 transitions. [2024-09-15 19:54:03,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-15 19:54:03,498 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:03,498 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:54:03,514 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 19:54:03,698 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 [2024-09-15 19:54:03,699 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:03,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash 183627405, now seen corresponding path program 1 times [2024-09-15 19:54:03,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:03,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914957747] [2024-09-15 19:54:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:03,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:54:03,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67979348] [2024-09-15 19:54:03,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:03,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:03,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:03,724 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) [2024-09-15 19:54:03,724 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:54:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:03,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-15 19:54:03,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:03,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:54:03,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:54:03,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:03,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:03,934 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 11 treesize of output 7 [2024-09-15 19:54:03,940 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 11 treesize of output 7 [2024-09-15 19:54:04,156 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 19 treesize of output 11 [2024-09-15 19:54:04,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:54:04,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2024-09-15 19:54:04,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:54:04,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 33 [2024-09-15 19:54:04,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:54:04,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2024-09-15 19:54:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:54:04,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:54:04,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:04,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914957747] [2024-09-15 19:54:04,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:54:04,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67979348] [2024-09-15 19:54:04,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67979348] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:54:04,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:54:04,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-15 19:54:04,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921893537] [2024-09-15 19:54:04,717 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:54:04,719 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 19:54:04,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:04,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 19:54:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-09-15 19:54:04,720 INFO L87 Difference]: Start difference. First operand 163 states and 193 transitions. Second operand has 17 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-15 19:54:08,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:09,713 INFO L93 Difference]: Finished difference Result 175 states and 202 transitions. [2024-09-15 19:54:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-15 19:54:09,714 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 52 [2024-09-15 19:54:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:09,715 INFO L225 Difference]: With dead ends: 175 [2024-09-15 19:54:09,715 INFO L226 Difference]: Without dead ends: 173 [2024-09-15 19:54:09,716 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2024-09-15 19:54:09,716 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 48 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 34 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:09,716 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 167 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 550 Invalid, 4 Unknown, 0 Unchecked, 4.6s Time] [2024-09-15 19:54:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-15 19:54:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2024-09-15 19:54:09,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 113 states have internal predecessors, (120), 36 states have call successors, (36), 23 states have call predecessors, (36), 26 states have return successors, (43), 34 states have call predecessors, (43), 32 states have call successors, (43) [2024-09-15 19:54:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 199 transitions. [2024-09-15 19:54:09,782 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 199 transitions. Word has length 52 [2024-09-15 19:54:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:09,783 INFO L474 AbstractCegarLoop]: Abstraction has 171 states and 199 transitions. [2024-09-15 19:54:09,783 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-15 19:54:09,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 199 transitions. [2024-09-15 19:54:09,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-15 19:54:09,784 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:09,784 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:54:09,798 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 19:54:09,988 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 [2024-09-15 19:54:09,989 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:09,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash -528266775, now seen corresponding path program 2 times [2024-09-15 19:54:09,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:09,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735771394] [2024-09-15 19:54:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:09,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:54:10,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574763560] [2024-09-15 19:54:10,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:54:10,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:10,045 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) [2024-09-15 19:54:10,049 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:54:10,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:54:10,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:54:10,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-09-15 19:54:10,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:10,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:54:10,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:54:10,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:10,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:54:10,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:54:10,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:10,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:10,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:10,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-09-15 19:54:10,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-09-15 19:54:10,820 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 29 treesize of output 21 [2024-09-15 19:54:10,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:54:11,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-15 19:54:11,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-15 19:54:11,023 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 17 treesize of output 9 [2024-09-15 19:54:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 19:54:11,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:54:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 19:54:11,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:11,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735771394] [2024-09-15 19:54:11,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:54:11,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574763560] [2024-09-15 19:54:11,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574763560] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:54:11,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:54:11,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-09-15 19:54:11,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873587577] [2024-09-15 19:54:11,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:54:11,503 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 19:54:11,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:11,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 19:54:11,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-15 19:54:11,504 INFO L87 Difference]: Start difference. First operand 171 states and 199 transitions. Second operand has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-15 19:54:15,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:15,687 INFO L93 Difference]: Finished difference Result 252 states and 297 transitions. [2024-09-15 19:54:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 19:54:15,689 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 53 [2024-09-15 19:54:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:15,692 INFO L225 Difference]: With dead ends: 252 [2024-09-15 19:54:15,692 INFO L226 Difference]: Without dead ends: 250 [2024-09-15 19:54:15,693 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2024-09-15 19:54:15,693 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 117 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:15,693 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 389 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-15 19:54:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-09-15 19:54:15,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2024-09-15 19:54:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 156 states have (on average 1.108974358974359) internal successors, (173), 162 states have internal predecessors, (173), 48 states have call successors, (48), 33 states have call predecessors, (48), 40 states have return successors, (65), 49 states have call predecessors, (65), 42 states have call successors, (65) [2024-09-15 19:54:15,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 286 transitions. [2024-09-15 19:54:15,768 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 286 transitions. Word has length 53 [2024-09-15 19:54:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:15,768 INFO L474 AbstractCegarLoop]: Abstraction has 245 states and 286 transitions. [2024-09-15 19:54:15,768 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-15 19:54:15,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 286 transitions. [2024-09-15 19:54:15,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 19:54:15,770 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:15,770 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:54:15,780 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-15 19:54:15,970 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 [2024-09-15 19:54:15,971 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:15,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash 250711066, now seen corresponding path program 1 times [2024-09-15 19:54:15,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:15,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916054222] [2024-09-15 19:54:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:15,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:54:16,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971188538] [2024-09-15 19:54:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:16,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:16,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:16,033 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) [2024-09-15 19:54:16,038 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 19:54:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:16,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-15 19:54:16,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:16,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:16,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:16,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:16,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 19:54:16,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:54:16,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:16,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916054222] [2024-09-15 19:54:16,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:54:16,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971188538] [2024-09-15 19:54:16,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971188538] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:54:16,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:54:16,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-15 19:54:16,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559168031] [2024-09-15 19:54:16,865 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:54:16,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:54:16,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:16,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:54:16,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:54:16,866 INFO L87 Difference]: Start difference. First operand 245 states and 286 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-15 19:54:17,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:17,233 INFO L93 Difference]: Finished difference Result 253 states and 292 transitions. [2024-09-15 19:54:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:54:17,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2024-09-15 19:54:17,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:17,235 INFO L225 Difference]: With dead ends: 253 [2024-09-15 19:54:17,235 INFO L226 Difference]: Without dead ends: 249 [2024-09-15 19:54:17,236 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:54:17,236 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:17,237 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 105 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:54:17,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-09-15 19:54:17,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2024-09-15 19:54:17,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 158 states have (on average 1.1012658227848102) internal successors, (174), 163 states have internal predecessors, (174), 48 states have call successors, (48), 34 states have call predecessors, (48), 40 states have return successors, (65), 49 states have call predecessors, (65), 42 states have call successors, (65) [2024-09-15 19:54:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 287 transitions. [2024-09-15 19:54:17,308 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 287 transitions. Word has length 58 [2024-09-15 19:54:17,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:17,308 INFO L474 AbstractCegarLoop]: Abstraction has 247 states and 287 transitions. [2024-09-15 19:54:17,308 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-15 19:54:17,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:17,309 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 287 transitions. [2024-09-15 19:54:17,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-15 19:54:17,309 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:17,309 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:54:17,322 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 19:54:17,510 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 [2024-09-15 19:54:17,510 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:17,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:17,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1798650033, now seen corresponding path program 1 times [2024-09-15 19:54:17,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:17,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282601700] [2024-09-15 19:54:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:17,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:54:17,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382663687] [2024-09-15 19:54:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:17,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:17,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:17,538 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) [2024-09-15 19:54:17,546 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 19:54:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:17,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 181 conjuncts are in the unsatisfiable core [2024-09-15 19:54:17,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:17,694 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 [2024-09-15 19:54:17,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:54:17,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:17,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:54:17,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:17,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:54:17,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:17,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:18,483 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 58 treesize of output 42 [2024-09-15 19:54:18,486 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 58 treesize of output 36 [2024-09-15 19:54:18,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:54:18,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-09-15 19:54:18,938 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 55 treesize of output 35 [2024-09-15 19:54:18,943 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 21 treesize of output 13 [2024-09-15 19:54:18,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 16 [2024-09-15 19:54:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 19:54:19,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:54:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 19:54:20,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:20,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282601700] [2024-09-15 19:54:20,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:54:20,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382663687] [2024-09-15 19:54:20,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382663687] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:54:20,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:54:20,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 27 [2024-09-15 19:54:20,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215876944] [2024-09-15 19:54:20,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:54:20,114 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-15 19:54:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-15 19:54:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-09-15 19:54:20,115 INFO L87 Difference]: Start difference. First operand 247 states and 287 transitions. Second operand has 27 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 11 states have call successors, (22), 9 states have call predecessors, (22), 5 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-15 19:54:24,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:34,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:54:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:34,998 INFO L93 Difference]: Finished difference Result 340 states and 399 transitions. [2024-09-15 19:54:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-15 19:54:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 11 states have call successors, (22), 9 states have call predecessors, (22), 5 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 59 [2024-09-15 19:54:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:35,000 INFO L225 Difference]: With dead ends: 340 [2024-09-15 19:54:35,000 INFO L226 Difference]: Without dead ends: 338 [2024-09-15 19:54:35,001 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 83 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=530, Invalid=3376, Unknown=0, NotChecked=0, Total=3906 [2024-09-15 19:54:35,001 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 195 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 94 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:35,001 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 533 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1316 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2024-09-15 19:54:35,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2024-09-15 19:54:35,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2024-09-15 19:54:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 214 states have (on average 1.1074766355140186) internal successors, (237), 222 states have internal predecessors, (237), 64 states have call successors, (64), 45 states have call predecessors, (64), 55 states have return successors, (92), 66 states have call predecessors, (92), 57 states have call successors, (92) [2024-09-15 19:54:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 393 transitions. [2024-09-15 19:54:35,122 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 393 transitions. Word has length 59 [2024-09-15 19:54:35,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:35,124 INFO L474 AbstractCegarLoop]: Abstraction has 334 states and 393 transitions. [2024-09-15 19:54:35,124 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 11 states have call successors, (22), 9 states have call predecessors, (22), 5 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-15 19:54:35,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 393 transitions. [2024-09-15 19:54:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-15 19:54:35,126 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:35,126 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:54:35,145 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 19:54:35,327 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 [2024-09-15 19:54:35,327 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:35,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:35,328 INFO L85 PathProgramCache]: Analyzing trace with hash 811390181, now seen corresponding path program 1 times [2024-09-15 19:54:35,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:35,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389541513] [2024-09-15 19:54:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:35,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:54:35,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664546660] [2024-09-15 19:54:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:35,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:35,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:35,357 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) [2024-09-15 19:54:35,358 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 19:54:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:35,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-15 19:54:35,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:35,483 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 [2024-09-15 19:54:35,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:35,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:54:35,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:35,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:54:35,515 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 11 treesize of output 7 [2024-09-15 19:54:35,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-15 19:54:35,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:55:00,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:55:00,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2024-09-15 19:55:00,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:55:00,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2024-09-15 19:55:00,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 34 [2024-09-15 19:55:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 44 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 19:55:00,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:55:21,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:55:21,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389541513] [2024-09-15 19:55:21,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:55:21,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664546660] [2024-09-15 19:55:21,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664546660] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:55:21,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:55:21,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-15 19:55:21,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540763105] [2024-09-15 19:55:21,638 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:55:21,639 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 19:55:21,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:55:21,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 19:55:21,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=309, Unknown=8, NotChecked=0, Total=380 [2024-09-15 19:55:21,639 INFO L87 Difference]: Start difference. First operand 334 states and 393 transitions. Second operand has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-15 19:55:31,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:35,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:55:39,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:43,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:55:43,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:55:43,950 INFO L93 Difference]: Finished difference Result 338 states and 395 transitions. [2024-09-15 19:55:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 19:55:43,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 64 [2024-09-15 19:55:43,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:55:43,952 INFO L225 Difference]: With dead ends: 338 [2024-09-15 19:55:43,952 INFO L226 Difference]: Without dead ends: 312 [2024-09-15 19:55:43,953 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 47.7s TimeCoverageRelationStatistics Valid=163, Invalid=698, Unknown=9, NotChecked=0, Total=870 [2024-09-15 19:55:43,953 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 35 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2024-09-15 19:55:43,953 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 95 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 395 Invalid, 16 Unknown, 0 Unchecked, 19.5s Time] [2024-09-15 19:55:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-09-15 19:55:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 310. [2024-09-15 19:55:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 198 states have (on average 1.1111111111111112) internal successors, (220), 206 states have internal predecessors, (220), 60 states have call successors, (60), 41 states have call predecessors, (60), 51 states have return successors, (88), 62 states have call predecessors, (88), 54 states have call successors, (88) [2024-09-15 19:55:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 368 transitions. [2024-09-15 19:55:44,088 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 368 transitions. Word has length 64 [2024-09-15 19:55:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:55:44,088 INFO L474 AbstractCegarLoop]: Abstraction has 310 states and 368 transitions. [2024-09-15 19:55:44,088 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-15 19:55:44,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 368 transitions. [2024-09-15 19:55:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-15 19:55:44,089 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:55:44,089 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:55:44,103 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-15 19:55:44,293 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 [2024-09-15 19:55:44,297 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:55:44,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash -269648858, now seen corresponding path program 3 times [2024-09-15 19:55:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:55:44,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344476310] [2024-09-15 19:55:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:44,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:55:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:55:44,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150506598] [2024-09-15 19:55:44,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:55:44,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:55:44,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:55:44,353 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) [2024-09-15 19:55:44,354 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 19:55:44,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 19:55:44,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:55:44,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 165 conjuncts are in the unsatisfiable core [2024-09-15 19:55:44,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:55:44,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:55:45,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:55:45,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:55:45,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:55:48,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:55:48,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-09-15 19:55:51,730 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 21 treesize of output 15 [2024-09-15 19:55:51,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:55:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 19:55:53,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:23,874 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_33_to_48_0_#t~mem6_24| Int)) (let ((.cse0 (select (select |c_#memory_int#5| c_func_to_recursive_line_33_to_48_0_~s.base) c_func_to_recursive_line_33_to_48_0_~s.offset))) (or (< (select (select |c_#memory_int#4| c_func_to_recursive_line_33_to_48_0_~r.base) c_func_to_recursive_line_33_to_48_0_~r.offset) (+ .cse0 |v_func_to_recursive_line_33_to_48_0_#t~mem6_24|)) (= (let ((.cse1 (select (select |c_#memory_int#8| c_func_to_recursive_line_33_to_48_0_~q.base) c_func_to_recursive_line_33_to_48_0_~q.offset))) (+ (* .cse1 |v_func_to_recursive_line_33_to_48_0_#t~mem6_24|) (* .cse0 .cse1) 1)) (* (select (select |c_#memory_int#6| c_func_to_recursive_line_33_to_48_0_~p.base) c_func_to_recursive_line_33_to_48_0_~p.offset) .cse0))))) is different from false [2024-09-15 19:56:24,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:24,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344476310] [2024-09-15 19:56:24,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:24,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150506598] [2024-09-15 19:56:24,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150506598] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:24,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:24,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-15 19:56:24,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599929705] [2024-09-15 19:56:24,077 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:24,077 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 19:56:24,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 19:56:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=4, NotChecked=38, Total=462 [2024-09-15 19:56:24,078 INFO L87 Difference]: Start difference. First operand 310 states and 368 transitions. Second operand has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (14), 7 states have call predecessors, (14), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-15 19:56:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:33,148 INFO L93 Difference]: Finished difference Result 333 states and 397 transitions. [2024-09-15 19:56:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-15 19:56:33,148 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (14), 7 states have call predecessors, (14), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 70 [2024-09-15 19:56:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:33,150 INFO L225 Difference]: With dead ends: 333 [2024-09-15 19:56:33,150 INFO L226 Difference]: Without dead ends: 331 [2024-09-15 19:56:33,151 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=4, NotChecked=70, Total=1406 [2024-09-15 19:56:33,151 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 116 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:33,151 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 426 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-09-15 19:56:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-09-15 19:56:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 328. [2024-09-15 19:56:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 209 states have (on average 1.1100478468899522) internal successors, (232), 218 states have internal predecessors, (232), 64 states have call successors, (64), 43 states have call predecessors, (64), 54 states have return successors, (96), 66 states have call predecessors, (96), 58 states have call successors, (96) [2024-09-15 19:56:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 392 transitions. [2024-09-15 19:56:33,305 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 392 transitions. Word has length 70 [2024-09-15 19:56:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:33,306 INFO L474 AbstractCegarLoop]: Abstraction has 328 states and 392 transitions. [2024-09-15 19:56:33,306 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (14), 7 states have call predecessors, (14), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-15 19:56:33,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 392 transitions. [2024-09-15 19:56:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-15 19:56:33,307 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:33,307 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:33,324 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-15 19:56:33,509 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 [2024-09-15 19:56:33,509 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:33,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1078995484, now seen corresponding path program 1 times [2024-09-15 19:56:33,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:33,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806581508] [2024-09-15 19:56:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:33,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:33,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181201275] [2024-09-15 19:56:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:33,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:33,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:33,553 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) [2024-09-15 19:56:33,554 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 19:56:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:33,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 153 conjuncts are in the unsatisfiable core [2024-09-15 19:56:33,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:33,736 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 11 treesize of output 7 [2024-09-15 19:56:33,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:33,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:33,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:35,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-09-15 19:56:35,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:38,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:38,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-09-15 19:56:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 19:56:39,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-15 19:56:41,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:41,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806581508] [2024-09-15 19:56:41,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:41,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181201275] [2024-09-15 19:56:41,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181201275] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:56:41,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:56:41,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 18 [2024-09-15 19:56:41,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466440705] [2024-09-15 19:56:41,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:41,472 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 19:56:41,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:41,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 19:56:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-15 19:56:41,475 INFO L87 Difference]: Start difference. First operand 328 states and 392 transitions. Second operand has 18 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 9 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-15 19:56:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:49,166 INFO L93 Difference]: Finished difference Result 363 states and 433 transitions. [2024-09-15 19:56:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-15 19:56:49,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 9 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 70 [2024-09-15 19:56:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:49,168 INFO L225 Difference]: With dead ends: 363 [2024-09-15 19:56:49,169 INFO L226 Difference]: Without dead ends: 361 [2024-09-15 19:56:49,169 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2024-09-15 19:56:49,169 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 70 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:49,169 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 388 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-09-15 19:56:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2024-09-15 19:56:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 308. [2024-09-15 19:56:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 198 states have (on average 1.106060606060606) internal successors, (219), 208 states have internal predecessors, (219), 56 states have call successors, (56), 42 states have call predecessors, (56), 53 states have return successors, (94), 57 states have call predecessors, (94), 53 states have call successors, (94) [2024-09-15 19:56:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 369 transitions. [2024-09-15 19:56:49,338 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 369 transitions. Word has length 70 [2024-09-15 19:56:49,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:49,338 INFO L474 AbstractCegarLoop]: Abstraction has 308 states and 369 transitions. [2024-09-15 19:56:49,339 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 9 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-15 19:56:49,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 369 transitions. [2024-09-15 19:56:49,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-15 19:56:49,340 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:49,340 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:49,354 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-15 19:56:49,540 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 [2024-09-15 19:56:49,541 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:49,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash -538069386, now seen corresponding path program 1 times [2024-09-15 19:56:49,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:49,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805047486] [2024-09-15 19:56:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:49,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:49,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218226738] [2024-09-15 19:56:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:49,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:49,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:49,574 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) [2024-09-15 19:56:49,574 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 19:56:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:49,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-09-15 19:56:49,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:49,741 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 [2024-09-15 19:56:49,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:56:49,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:49,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:56:49,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:49,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:49,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:50,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-15 19:56:50,165 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 11 treesize of output 7 [2024-09-15 19:56:54,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-09-15 19:56:54,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:54,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-09-15 19:56:54,924 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 25 treesize of output 17 [2024-09-15 19:56:56,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:56,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2024-09-15 19:56:56,393 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 17 treesize of output 9 [2024-09-15 19:56:56,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:56,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2024-09-15 19:56:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-15 19:56:57,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:03,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:03,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805047486] [2024-09-15 19:57:03,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:57:03,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218226738] [2024-09-15 19:57:03,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218226738] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:03,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:57:03,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-15 19:57:03,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950341943] [2024-09-15 19:57:03,912 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:03,913 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 19:57:03,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:03,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 19:57:03,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2024-09-15 19:57:03,914 INFO L87 Difference]: Start difference. First operand 308 states and 369 transitions. Second operand has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-15 19:57:11,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:11,559 INFO L93 Difference]: Finished difference Result 337 states and 402 transitions. [2024-09-15 19:57:11,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 19:57:11,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 77 [2024-09-15 19:57:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:11,563 INFO L225 Difference]: With dead ends: 337 [2024-09-15 19:57:11,563 INFO L226 Difference]: Without dead ends: 335 [2024-09-15 19:57:11,564 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2024-09-15 19:57:11,566 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 39 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:11,566 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 124 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 677 Invalid, 4 Unknown, 0 Unchecked, 5.3s Time] [2024-09-15 19:57:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2024-09-15 19:57:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 333. [2024-09-15 19:57:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 213 states have (on average 1.1032863849765258) internal successors, (235), 224 states have internal predecessors, (235), 61 states have call successors, (61), 45 states have call predecessors, (61), 58 states have return successors, (103), 63 states have call predecessors, (103), 57 states have call successors, (103) [2024-09-15 19:57:11,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 399 transitions. [2024-09-15 19:57:11,760 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 399 transitions. Word has length 77 [2024-09-15 19:57:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:11,760 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 399 transitions. [2024-09-15 19:57:11,760 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-15 19:57:11,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 399 transitions. [2024-09-15 19:57:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-15 19:57:11,763 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:11,763 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:57:11,777 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-15 19:57:11,966 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 [2024-09-15 19:57:11,967 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:11,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1567428684, now seen corresponding path program 1 times [2024-09-15 19:57:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:11,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082486071] [2024-09-15 19:57:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:11,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:11,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728210907] [2024-09-15 19:57:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:11,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:11,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:11,998 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) [2024-09-15 19:57:11,999 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 19:57:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:12,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-15 19:57:12,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:12,189 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 [2024-09-15 19:57:12,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:12,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:57:12,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:12,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:57:12,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-15 19:57:12,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-15 19:57:18,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-09-15 19:57:18,977 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 47 treesize of output 31 [2024-09-15 19:57:21,751 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:21,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 96 [2024-09-15 19:57:22,340 INFO L349 Elim1Store]: treesize reduction 12, result has 83.6 percent of original size [2024-09-15 19:57:22,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 130 [2024-09-15 19:57:22,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:22,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2024-09-15 19:57:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-15 19:57:23,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:24,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:24,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082486071] [2024-09-15 19:57:24,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:57:24,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728210907] [2024-09-15 19:57:24,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728210907] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:24,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:57:24,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-15 19:57:24,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614876319] [2024-09-15 19:57:24,709 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:24,709 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 19:57:24,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:24,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 19:57:24,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2024-09-15 19:57:24,710 INFO L87 Difference]: Start difference. First operand 333 states and 399 transitions. Second operand has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-15 19:57:28,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:41,823 INFO L93 Difference]: Finished difference Result 357 states and 423 transitions. [2024-09-15 19:57:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 19:57:41,824 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) Word has length 77 [2024-09-15 19:57:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:41,826 INFO L225 Difference]: With dead ends: 357 [2024-09-15 19:57:41,826 INFO L226 Difference]: Without dead ends: 355 [2024-09-15 19:57:41,827 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 42 SyntacticMatches, 15 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2024-09-15 19:57:41,827 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 16 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:41,827 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 211 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1043 Invalid, 5 Unknown, 0 Unchecked, 12.6s Time] [2024-09-15 19:57:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-09-15 19:57:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 331. [2024-09-15 19:57:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 212 states have (on average 1.1037735849056605) internal successors, (234), 223 states have internal predecessors, (234), 61 states have call successors, (61), 45 states have call predecessors, (61), 57 states have return successors, (102), 62 states have call predecessors, (102), 57 states have call successors, (102) [2024-09-15 19:57:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 397 transitions. [2024-09-15 19:57:42,019 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 397 transitions. Word has length 77 [2024-09-15 19:57:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:42,020 INFO L474 AbstractCegarLoop]: Abstraction has 331 states and 397 transitions. [2024-09-15 19:57:42,020 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-15 19:57:42,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:42,021 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 397 transitions. [2024-09-15 19:57:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-15 19:57:42,022 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:42,022 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:57:42,036 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-15 19:57:42,226 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 [2024-09-15 19:57:42,227 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:42,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:42,227 INFO L85 PathProgramCache]: Analyzing trace with hash 424149315, now seen corresponding path program 1 times [2024-09-15 19:57:42,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:42,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133337806] [2024-09-15 19:57:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:42,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:42,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840119592] [2024-09-15 19:57:42,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:42,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:42,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:42,269 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) [2024-09-15 19:57:42,269 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-15 19:57:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:42,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-15 19:57:42,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:42,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:42,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:42,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:44,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-15 19:57:46,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:46,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:46,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133337806] [2024-09-15 19:57:46,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:57:46,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840119592] [2024-09-15 19:57:46,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840119592] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:46,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:57:46,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-15 19:57:46,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9987680] [2024-09-15 19:57:46,894 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:46,894 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 19:57:46,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:46,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 19:57:46,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:57:46,895 INFO L87 Difference]: Start difference. First operand 331 states and 397 transitions. Second operand has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-15 19:57:51,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:51,109 INFO L93 Difference]: Finished difference Result 381 states and 448 transitions. [2024-09-15 19:57:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 19:57:51,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 83 [2024-09-15 19:57:51,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:51,113 INFO L225 Difference]: With dead ends: 381 [2024-09-15 19:57:51,114 INFO L226 Difference]: Without dead ends: 377 [2024-09-15 19:57:51,114 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-09-15 19:57:51,115 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:51,115 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 116 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-09-15 19:57:51,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2024-09-15 19:57:51,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2024-09-15 19:57:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 241 states have (on average 1.095435684647303) internal successors, (264), 251 states have internal predecessors, (264), 69 states have call successors, (69), 52 states have call predecessors, (69), 64 states have return successors, (109), 71 states have call predecessors, (109), 63 states have call successors, (109) [2024-09-15 19:57:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 442 transitions. [2024-09-15 19:57:51,382 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 442 transitions. Word has length 83 [2024-09-15 19:57:51,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:51,382 INFO L474 AbstractCegarLoop]: Abstraction has 375 states and 442 transitions. [2024-09-15 19:57:51,383 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-15 19:57:51,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 442 transitions. [2024-09-15 19:57:51,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-15 19:57:51,384 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:51,384 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:57:51,401 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-15 19:57:51,584 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 [2024-09-15 19:57:51,585 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:51,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:51,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1625238527, now seen corresponding path program 1 times [2024-09-15 19:57:51,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:51,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540066240] [2024-09-15 19:57:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:51,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:51,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722681242] [2024-09-15 19:57:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:51,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:51,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:51,638 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) [2024-09-15 19:57:51,640 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-15 19:57:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:51,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-15 19:57:51,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:51,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:51,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:51,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:51,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:55,182 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 [2024-09-15 19:57:55,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:56,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-15 19:57:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-15 19:57:57,081 INFO L327 TraceCheckSpWp]: Computing backward predicates...