./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-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 1d5fa637 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_prod4br-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 96f1211cbeeae798f0ae4041c6e80d5023e7b1c38257b583d7afbb4e6848597b --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 10:00:09,829 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 10:00:09,892 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 10:00:09,895 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 10:00:09,895 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 10:00:09,939 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 10:00:09,941 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 10:00:09,941 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 10:00:09,942 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 10:00:09,943 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 10:00:09,943 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 10:00:09,944 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 10:00:09,945 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 10:00:09,945 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 10:00:09,945 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 10:00:09,948 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 10:00:09,948 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 10:00:09,948 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 10:00:09,949 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 10:00:09,949 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 10:00:09,949 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 10:00:09,949 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 10:00:09,949 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 10:00:09,955 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 10:00:09,955 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 10:00:09,955 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 10:00:09,956 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 10:00:09,956 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 10:00:09,956 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 10:00:09,956 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 10:00:09,956 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 10:00:09,956 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 10:00:09,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:00:09,957 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 10:00:09,957 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 10:00:09,957 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 10:00:09,957 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 10:00:09,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 10:00:09,957 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 10:00:09,958 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 10:00:09,958 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 10:00:09,960 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 10:00:09,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96f1211cbeeae798f0ae4041c6e80d5023e7b1c38257b583d7afbb4e6848597b Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 10:00:10,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 10:00:10,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 10:00:10,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 10:00:10,201 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 10:00:10,201 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 10:00:10,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c [2024-09-13 10:00:11,487 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 10:00:11,644 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 10:00:11,645 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c [2024-09-13 10:00:11,652 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/3b90fca63/80314465a9c749f38e8ccfb1c8fc03b1/FLAGc93c4a77e [2024-09-13 10:00:11,666 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/3b90fca63/80314465a9c749f38e8ccfb1c8fc03b1 [2024-09-13 10:00:11,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 10:00:11,669 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 10:00:11,673 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 10:00:11,674 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 10:00:11,677 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 10:00:11,678 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:11,679 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c90ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11, skipping insertion in model container [2024-09-13 10:00:11,679 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:11,694 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 10:00:11,816 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c[1060,1073] [2024-09-13 10:00:11,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:00:11,854 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 10:00:11,863 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c[1060,1073] [2024-09-13 10:00:11,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:00:11,887 INFO L204 MainTranslator]: Completed translation [2024-09-13 10:00:11,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11 WrapperNode [2024-09-13 10:00:11,888 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 10:00:11,889 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 10:00:11,889 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 10:00:11,889 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 10:00:11,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:11,903 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:11,909 INFO L138 Inliner]: procedures = 16, calls = 86, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 10:00:11,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 10:00:11,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 10:00:11,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 10:00:11,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 10:00:11,917 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:11,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:11,922 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:11,961 INFO L175 MemorySlicer]: Split 57 memory accesses to 7 slices as follows [2, 4, 5, 7, 15, 9, 15]. 26 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 16 writes are split as follows [0, 1, 1, 2, 4, 4, 4]. [2024-09-13 10:00:11,961 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:11,961 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:11,977 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:11,979 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:11,984 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:11,985 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:12,002 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 10:00:12,005 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 10:00:12,005 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 10:00:12,005 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 10:00:12,006 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (1/1) ... [2024-09-13 10:00:12,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:00:12,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:12,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 10:00:12,044 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 10:00:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 10:00:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 10:00:12,080 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 10:00:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 10:00:12,080 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 10:00:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 10:00:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-13 10:00:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-13 10:00:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-13 10:00:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-13 10:00:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-13 10:00:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-13 10:00:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-13 10:00:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-13 10:00:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-13 10:00:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-13 10:00:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-13 10:00:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-13 10:00:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-13 10:00:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-13 10:00:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 10:00:12,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 10:00:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 10:00:12,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 10:00:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-13 10:00:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-13 10:00:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-13 10:00:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-13 10:00:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-13 10:00:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-13 10:00:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-13 10:00:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_51_0 [2024-09-13 10:00:12,084 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_51_0 [2024-09-13 10:00:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 10:00:12,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 10:00:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-13 10:00:12,189 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 10:00:12,191 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 10:00:12,436 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-09-13 10:00:12,437 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 10:00:12,458 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 10:00:12,459 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-13 10:00:12,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:00:12 BoogieIcfgContainer [2024-09-13 10:00:12,459 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 10:00:12,462 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 10:00:12,462 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 10:00:12,464 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 10:00:12,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 10:00:11" (1/3) ... [2024-09-13 10:00:12,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae6cb6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:00:12, skipping insertion in model container [2024-09-13 10:00:12,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:00:11" (2/3) ... [2024-09-13 10:00:12,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae6cb6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:00:12, skipping insertion in model container [2024-09-13 10:00:12,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:00:12" (3/3) ... [2024-09-13 10:00:12,466 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_prod4br-ll.c [2024-09-13 10:00:12,477 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 10:00:12,477 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 10:00:12,531 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 10:00:12,536 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;@d06655a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 10:00:12,536 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 10:00:12,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 28 states have internal predecessors, (38), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-13 10:00:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-13 10:00:12,544 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:12,544 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:12,545 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:12,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1334266921, now seen corresponding path program 1 times [2024-09-13 10:00:12,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:12,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665733887] [2024-09-13 10:00:12,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:12,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:12,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:00:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:12,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:00:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:00:12,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:12,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665733887] [2024-09-13 10:00:12,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665733887] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:00:12,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:00:12,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 10:00:12,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625942645] [2024-09-13 10:00:12,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:00:12,712 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 10:00:12,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:12,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 10:00:12,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 10:00:12,737 INFO L87 Difference]: Start difference. First operand has 41 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 28 states have internal predecessors, (38), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 10:00:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:12,760 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2024-09-13 10:00:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 10:00:12,762 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-13 10:00:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:12,767 INFO L225 Difference]: With dead ends: 74 [2024-09-13 10:00:12,767 INFO L226 Difference]: Without dead ends: 37 [2024-09-13 10:00:12,769 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 10:00:12,771 INFO L434 NwaCegarLoop]: 49 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, 49 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:12,772 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:00:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-13 10:00:12,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-13 10:00:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.375) internal successors, (33), 26 states have internal predecessors, (33), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 10:00:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2024-09-13 10:00:12,805 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 18 [2024-09-13 10:00:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:12,806 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2024-09-13 10:00:12,806 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 10:00:12,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2024-09-13 10:00:12,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-13 10:00:12,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:12,808 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:12,808 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 10:00:12,808 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:12,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:12,809 INFO L85 PathProgramCache]: Analyzing trace with hash -633202343, now seen corresponding path program 1 times [2024-09-13 10:00:12,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:12,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392315941] [2024-09-13 10:00:12,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:12,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:00:12,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349187047] [2024-09-13 10:00:12,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:12,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:12,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:12,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:00:12,889 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 10:00:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:13,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-13 10:00:13,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:00:13,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:13,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:13,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:00:13,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:13,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:00:13,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:13,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:00:13,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:00:13,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:00:13,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:00:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:00:13,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:00:13,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:13,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392315941] [2024-09-13 10:00:13,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:00:13,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349187047] [2024-09-13 10:00:13,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349187047] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:00:13,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:00:13,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 10:00:13,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403641646] [2024-09-13 10:00:13,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:00:13,341 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 10:00:13,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 10:00:13,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-13 10:00:13,342 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 10:00:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:13,559 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-09-13 10:00:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 10:00:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-13 10:00:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:13,560 INFO L225 Difference]: With dead ends: 58 [2024-09-13 10:00:13,560 INFO L226 Difference]: Without dead ends: 56 [2024-09-13 10:00:13,561 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-13 10:00:13,562 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:13,562 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 173 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:00:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-13 10:00:13,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2024-09-13 10:00:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 35 states have internal predecessors, (44), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-13 10:00:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2024-09-13 10:00:13,575 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 18 [2024-09-13 10:00:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:13,575 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2024-09-13 10:00:13,575 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 10:00:13,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2024-09-13 10:00:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-13 10:00:13,576 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:13,577 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:13,592 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 10:00:13,777 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:13,778 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:13,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash 261423925, now seen corresponding path program 1 times [2024-09-13 10:00:13,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:13,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397651943] [2024-09-13 10:00:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:13,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:00:13,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118942761] [2024-09-13 10:00:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:13,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:13,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:13,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:00:13,834 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 10:00:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:13,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 10:00:13,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:00:13,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:00:13,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:13,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:00:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:00:14,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:00:14,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:14,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397651943] [2024-09-13 10:00:14,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:00:14,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118942761] [2024-09-13 10:00:14,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118942761] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:00:14,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:00:14,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-13 10:00:14,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005301430] [2024-09-13 10:00:14,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:00:14,168 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 10:00:14,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:14,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 10:00:14,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-13 10:00:14,171 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 10:00:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:14,491 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2024-09-13 10:00:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 10:00:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-09-13 10:00:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:14,495 INFO L225 Difference]: With dead ends: 90 [2024-09-13 10:00:14,495 INFO L226 Difference]: Without dead ends: 65 [2024-09-13 10:00:14,495 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:00:14,496 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:14,496 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 115 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:00:14,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-13 10:00:14,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2024-09-13 10:00:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-13 10:00:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2024-09-13 10:00:14,511 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 29 [2024-09-13 10:00:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:14,511 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2024-09-13 10:00:14,511 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 10:00:14,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:14,512 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2024-09-13 10:00:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-13 10:00:14,512 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:14,513 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:14,525 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 10:00:14,716 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:14,717 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:14,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:14,718 INFO L85 PathProgramCache]: Analyzing trace with hash -418634445, now seen corresponding path program 1 times [2024-09-13 10:00:14,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:14,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914973749] [2024-09-13 10:00:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:14,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:15,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:00:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:15,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:00:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:15,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:00:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:15,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:00:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:00:15,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:15,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914973749] [2024-09-13 10:00:15,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914973749] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:00:15,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:00:15,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-13 10:00:15,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527757378] [2024-09-13 10:00:15,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:00:15,194 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 10:00:15,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 10:00:15,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-13 10:00:15,196 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 10:00:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:15,554 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2024-09-13 10:00:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 10:00:15,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-09-13 10:00:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:15,555 INFO L225 Difference]: With dead ends: 81 [2024-09-13 10:00:15,556 INFO L226 Difference]: Without dead ends: 69 [2024-09-13 10:00:15,556 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-13 10:00:15,556 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:15,557 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 108 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:00:15,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-13 10:00:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2024-09-13 10:00:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-13 10:00:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-13 10:00:15,571 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 29 [2024-09-13 10:00:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:15,572 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-13 10:00:15,572 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 10:00:15,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-13 10:00:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 10:00:15,573 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:15,573 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:15,573 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-13 10:00:15,573 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:15,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash 661556601, now seen corresponding path program 1 times [2024-09-13 10:00:15,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:15,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327417235] [2024-09-13 10:00:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:00:15,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943656953] [2024-09-13 10:00:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:15,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:15,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:15,606 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:00:15,608 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 10:00:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:15,705 WARN L260 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-09-13 10:00:15,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:00:15,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:15,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:15,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:15,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:00:15,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:00:15,736 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 [2024-09-13 10:00:16,076 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 38 treesize of output 22 [2024-09-13 10:00:16,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:00:16,116 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 38 treesize of output 22 [2024-09-13 10:00:16,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-13 10:00:16,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:00:16,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-13 10:00:16,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:00:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:00:16,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:00:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:00:17,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327417235] [2024-09-13 10:00:17,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:00:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943656953] [2024-09-13 10:00:17,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943656953] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:00:17,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 10:00:17,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-09-13 10:00:17,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956596030] [2024-09-13 10:00:17,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 10:00:17,773 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 10:00:17,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:17,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 10:00:17,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-09-13 10:00:17,774 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 21 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 10:00:22,509 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int#5| c_func_to_recursive_line_0_to_51_0_~q.base) c_func_to_recursive_line_0_to_51_0_~q.offset)) (.cse1 (select (select |c_#memory_int#3| c_func_to_recursive_line_0_to_51_0_~p.base) c_func_to_recursive_line_0_to_51_0_~p.offset)) (.cse7 (select (select |c_#memory_int#6| c_func_to_recursive_line_0_to_51_0_~a.base) c_func_to_recursive_line_0_to_51_0_~a.offset)) (.cse9 (select (select |c_#memory_int#1| c_func_to_recursive_line_0_to_51_0_~x.base) c_func_to_recursive_line_0_to_51_0_~x.offset)) (.cse8 (select (select |c_#memory_int#2| c_func_to_recursive_line_0_to_51_0_~y.base) c_func_to_recursive_line_0_to_51_0_~y.offset)) (.cse10 (select (select |c_#memory_int#4| c_func_to_recursive_line_0_to_51_0_~b.base) c_func_to_recursive_line_0_to_51_0_~b.offset))) (and (= (select (select |c_#memory_int#4| |c_func_to_recursive_line_0_to_51_0_#in~b.base|) |c_func_to_recursive_line_0_to_51_0_#in~b.offset|) (select (select |c_#memory_int#2| |c_func_to_recursive_line_0_to_51_0_#in~y.base|) |c_func_to_recursive_line_0_to_51_0_#in~y.offset|)) (= .cse0 0) (= (select (select |c_#memory_int#5| |c_func_to_recursive_line_0_to_51_0_#in~q.base|) |c_func_to_recursive_line_0_to_51_0_#in~q.offset|) 0) (= .cse1 1) (= (select (select |c_#memory_int#3| |c_func_to_recursive_line_0_to_51_0_#in~p.base|) |c_func_to_recursive_line_0_to_51_0_#in~p.offset|) 1) (or (let ((.cse2 (div .cse10 2))) (let ((.cse3 (* 4 (* .cse1 .cse2 (div .cse7 2)))) (.cse4 (* .cse8 .cse9)) (.cse5 (= (mod .cse7 2) 0)) (.cse6 (+ .cse7 1))) (and (or (= (+ .cse0 (* 4 (* .cse1 .cse2)) .cse3) .cse4) .cse5 (< 0 .cse6)) (or (= (+ .cse0 .cse3) .cse4) (and (not .cse5) (<= .cse6 0)))))) (not |c_func_to_recursive_line_0_to_51_0_#t~short15|) (not (= (mod .cse10 2) 0))) (= (select (select |c_#memory_int#6| |c_func_to_recursive_line_0_to_51_0_#in~a.base|) |c_func_to_recursive_line_0_to_51_0_#in~a.offset|) (select (select |c_#memory_int#1| |c_func_to_recursive_line_0_to_51_0_#in~x.base|) |c_func_to_recursive_line_0_to_51_0_#in~x.offset|)) (= .cse7 .cse9) (= .cse8 .cse10))) is different from false [2024-09-13 10:00:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:29,537 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2024-09-13 10:00:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-13 10:00:29,538 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-09-13 10:00:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:29,539 INFO L225 Difference]: With dead ends: 128 [2024-09-13 10:00:29,539 INFO L226 Difference]: Without dead ends: 124 [2024-09-13 10:00:29,540 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=234, Invalid=1101, Unknown=1, NotChecked=70, Total=1406 [2024-09-13 10:00:29,541 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 184 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:29,542 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 299 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 502 Invalid, 0 Unknown, 40 Unchecked, 2.6s Time] [2024-09-13 10:00:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-13 10:00:29,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2024-09-13 10:00:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 80 states have internal predecessors, (96), 17 states have call successors, (17), 12 states have call predecessors, (17), 15 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) [2024-09-13 10:00:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 144 transitions. [2024-09-13 10:00:29,601 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 144 transitions. Word has length 31 [2024-09-13 10:00:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:29,601 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 144 transitions. [2024-09-13 10:00:29,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 10:00:29,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 144 transitions. [2024-09-13 10:00:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 10:00:29,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:29,603 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:29,632 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 10:00:29,808 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:29,809 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:29,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:29,809 INFO L85 PathProgramCache]: Analyzing trace with hash -99805839, now seen corresponding path program 1 times [2024-09-13 10:00:29,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:29,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317200315] [2024-09-13 10:00:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:29,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:30,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:00:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:30,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:00:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:30,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 10:00:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:00:30,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:30,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317200315] [2024-09-13 10:00:30,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317200315] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:00:30,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:00:30,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 10:00:30,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433273547] [2024-09-13 10:00:30,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:00:30,355 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:00:30,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:30,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:00:30,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:00:30,356 INFO L87 Difference]: Start difference. First operand 106 states and 144 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 10:00:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:30,468 INFO L93 Difference]: Finished difference Result 176 states and 280 transitions. [2024-09-13 10:00:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:00:30,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2024-09-13 10:00:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:30,470 INFO L225 Difference]: With dead ends: 176 [2024-09-13 10:00:30,470 INFO L226 Difference]: Without dead ends: 119 [2024-09-13 10:00:30,471 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:00:30,472 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:30,476 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 110 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:00:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-13 10:00:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2024-09-13 10:00:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 85 states have internal predecessors, (102), 17 states have call successors, (17), 12 states have call predecessors, (17), 15 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) [2024-09-13 10:00:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 150 transitions. [2024-09-13 10:00:30,522 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 150 transitions. Word has length 33 [2024-09-13 10:00:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:30,523 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 150 transitions. [2024-09-13 10:00:30,523 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 10:00:30,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 150 transitions. [2024-09-13 10:00:30,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 10:00:30,524 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:30,524 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:30,524 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-13 10:00:30,524 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:30,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1560377938, now seen corresponding path program 1 times [2024-09-13 10:00:30,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:30,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915972489] [2024-09-13 10:00:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:30,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:00:30,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892705272] [2024-09-13 10:00:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:30,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:30,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:30,542 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:00:30,543 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 10:00:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:30,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-13 10:00:30,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:00:30,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:00:30,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:00:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:00:30,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:30,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915972489] [2024-09-13 10:00:30,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:00:30,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892705272] [2024-09-13 10:00:30,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892705272] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 10:00:30,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:00:30,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 14 [2024-09-13 10:00:30,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446755140] [2024-09-13 10:00:30,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:00:30,825 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 10:00:30,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 10:00:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-09-13 10:00:30,825 INFO L87 Difference]: Start difference. First operand 111 states and 150 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 10:00:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:30,970 INFO L93 Difference]: Finished difference Result 119 states and 167 transitions. [2024-09-13 10:00:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 10:00:30,971 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-09-13 10:00:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:30,972 INFO L225 Difference]: With dead ends: 119 [2024-09-13 10:00:30,972 INFO L226 Difference]: Without dead ends: 104 [2024-09-13 10:00:30,973 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:00:30,973 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:30,973 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 214 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:00:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-09-13 10:00:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2024-09-13 10:00:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 77 states have internal predecessors, (93), 15 states have call successors, (15), 10 states have call predecessors, (15), 14 states have return successors, (31), 12 states have call predecessors, (31), 13 states have call successors, (31) [2024-09-13 10:00:31,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 139 transitions. [2024-09-13 10:00:31,018 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 139 transitions. Word has length 35 [2024-09-13 10:00:31,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:31,018 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 139 transitions. [2024-09-13 10:00:31,018 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 10:00:31,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:31,018 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 139 transitions. [2024-09-13 10:00:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 10:00:31,022 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:31,022 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:31,037 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 10:00:31,222 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:31,223 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:31,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:31,223 INFO L85 PathProgramCache]: Analyzing trace with hash -954632819, now seen corresponding path program 1 times [2024-09-13 10:00:31,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:31,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164531645] [2024-09-13 10:00:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:31,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:31,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:00:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:31,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:00:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:31,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 10:00:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:00:31,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:31,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164531645] [2024-09-13 10:00:31,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164531645] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:00:31,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:00:31,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:00:31,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50868730] [2024-09-13 10:00:31,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:00:31,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 10:00:31,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 10:00:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:00:31,283 INFO L87 Difference]: Start difference. First operand 100 states and 139 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 10:00:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:31,342 INFO L93 Difference]: Finished difference Result 166 states and 243 transitions. [2024-09-13 10:00:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 10:00:31,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-09-13 10:00:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:31,344 INFO L225 Difference]: With dead ends: 166 [2024-09-13 10:00:31,344 INFO L226 Difference]: Without dead ends: 102 [2024-09-13 10:00:31,345 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:00:31,345 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:31,345 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:00:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-13 10:00:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-09-13 10:00:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 79 states have internal predecessors, (95), 15 states have call successors, (15), 10 states have call predecessors, (15), 14 states have return successors, (31), 12 states have call predecessors, (31), 13 states have call successors, (31) [2024-09-13 10:00:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 141 transitions. [2024-09-13 10:00:31,381 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 141 transitions. Word has length 35 [2024-09-13 10:00:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:31,381 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 141 transitions. [2024-09-13 10:00:31,381 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 10:00:31,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 141 transitions. [2024-09-13 10:00:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 10:00:31,383 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:31,383 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:31,384 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-13 10:00:31,384 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:31,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:31,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1763979445, now seen corresponding path program 1 times [2024-09-13 10:00:31,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:31,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186478311] [2024-09-13 10:00:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:31,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:31,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:00:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:31,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:00:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:31,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 10:00:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:00:31,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:31,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186478311] [2024-09-13 10:00:31,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186478311] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:00:31,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:00:31,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 10:00:31,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821000606] [2024-09-13 10:00:31,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:00:31,771 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:00:31,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:31,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:00:31,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:00:31,772 INFO L87 Difference]: Start difference. First operand 102 states and 141 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 10:00:31,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:31,896 INFO L93 Difference]: Finished difference Result 176 states and 266 transitions. [2024-09-13 10:00:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:00:31,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-09-13 10:00:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:31,897 INFO L225 Difference]: With dead ends: 176 [2024-09-13 10:00:31,897 INFO L226 Difference]: Without dead ends: 110 [2024-09-13 10:00:31,898 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:00:31,902 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 4 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:31,903 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 143 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:00:31,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-13 10:00:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2024-09-13 10:00:31,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 83 states have internal predecessors, (99), 15 states have call successors, (15), 10 states have call predecessors, (15), 14 states have return successors, (31), 12 states have call predecessors, (31), 13 states have call successors, (31) [2024-09-13 10:00:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2024-09-13 10:00:31,939 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 35 [2024-09-13 10:00:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:31,940 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2024-09-13 10:00:31,940 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 10:00:31,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2024-09-13 10:00:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 10:00:31,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:31,942 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:31,942 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-13 10:00:31,942 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:31,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:31,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1634691189, now seen corresponding path program 1 times [2024-09-13 10:00:31,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:31,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865448720] [2024-09-13 10:00:31,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:31,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:00:31,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968136595] [2024-09-13 10:00:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:31,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:31,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:31,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:00:31,985 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 10:00:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:32,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-09-13 10:00:32,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:00:32,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:32,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:32,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:00:32,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:32,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:32,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:00:32,365 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 29 treesize of output 17 [2024-09-13 10:00:32,373 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 15 [2024-09-13 10:00:32,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:00:32,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:00:32,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-13 10:00:32,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-13 10:00:32,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:00:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:00:32,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:00:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 10:00:32,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:32,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865448720] [2024-09-13 10:00:32,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:00:32,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968136595] [2024-09-13 10:00:32,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968136595] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:00:32,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 10:00:32,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-13 10:00:32,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932292452] [2024-09-13 10:00:32,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 10:00:32,767 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 10:00:32,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:32,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 10:00:32,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-13 10:00:32,768 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand has 15 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 8 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 10:00:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:34,235 INFO L93 Difference]: Finished difference Result 233 states and 342 transitions. [2024-09-13 10:00:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 10:00:34,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 8 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2024-09-13 10:00:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:34,237 INFO L225 Difference]: With dead ends: 233 [2024-09-13 10:00:34,237 INFO L226 Difference]: Without dead ends: 231 [2024-09-13 10:00:34,238 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-09-13 10:00:34,238 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 90 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:34,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 405 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 10:00:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-09-13 10:00:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 200. [2024-09-13 10:00:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 149 states have (on average 1.342281879194631) internal successors, (200), 164 states have internal predecessors, (200), 25 states have call successors, (25), 16 states have call predecessors, (25), 25 states have return successors, (70), 19 states have call predecessors, (70), 23 states have call successors, (70) [2024-09-13 10:00:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 295 transitions. [2024-09-13 10:00:34,303 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 295 transitions. Word has length 35 [2024-09-13 10:00:34,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:34,303 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 295 transitions. [2024-09-13 10:00:34,303 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 8 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 10:00:34,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:34,304 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 295 transitions. [2024-09-13 10:00:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 10:00:34,305 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:34,305 INFO L216 NwaCegarLoop]: trace histogram [3, 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] [2024-09-13 10:00:34,319 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 10:00:34,508 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 10:00:34,509 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:34,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:34,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1573056070, now seen corresponding path program 1 times [2024-09-13 10:00:34,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:34,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811856554] [2024-09-13 10:00:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:34,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:34,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:00:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:34,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:00:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:34,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:00:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:35,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:00:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:35,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 10:00:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:35,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:00:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 10:00:35,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:35,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811856554] [2024-09-13 10:00:35,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811856554] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:00:35,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307281155] [2024-09-13 10:00:35,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:35,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:35,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:35,194 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:00:35,199 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 10:00:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:35,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 10:00:35,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:00:35,397 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 19 [2024-09-13 10:00:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:00:35,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:00:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:00:35,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307281155] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:00:35,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:00:35,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2024-09-13 10:00:35,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146052402] [2024-09-13 10:00:35,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:00:35,650 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 10:00:35,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:35,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 10:00:35,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-09-13 10:00:35,651 INFO L87 Difference]: Start difference. First operand 200 states and 295 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-13 10:00:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:36,203 INFO L93 Difference]: Finished difference Result 264 states and 649 transitions. [2024-09-13 10:00:36,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 10:00:36,204 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 44 [2024-09-13 10:00:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:36,207 INFO L225 Difference]: With dead ends: 264 [2024-09-13 10:00:36,207 INFO L226 Difference]: Without dead ends: 239 [2024-09-13 10:00:36,207 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2024-09-13 10:00:36,208 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:36,208 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 88 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 10:00:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-13 10:00:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 211. [2024-09-13 10:00:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 152 states have (on average 1.3421052631578947) internal successors, (204), 173 states have internal predecessors, (204), 31 states have call successors, (31), 16 states have call predecessors, (31), 27 states have return successors, (110), 21 states have call predecessors, (110), 29 states have call successors, (110) [2024-09-13 10:00:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 345 transitions. [2024-09-13 10:00:36,301 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 345 transitions. Word has length 44 [2024-09-13 10:00:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:36,301 INFO L474 AbstractCegarLoop]: Abstraction has 211 states and 345 transitions. [2024-09-13 10:00:36,301 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-13 10:00:36,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 345 transitions. [2024-09-13 10:00:36,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 10:00:36,302 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:36,302 INFO L216 NwaCegarLoop]: trace histogram [3, 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] [2024-09-13 10:00:36,320 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 10:00:36,507 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 10:00:36,507 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:36,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2020846648, now seen corresponding path program 1 times [2024-09-13 10:00:36,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:36,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291900992] [2024-09-13 10:00:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:36,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:36,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:00:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:36,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:00:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:36,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:00:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:37,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:00:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:37,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 10:00:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:37,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:00:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 10:00:37,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:37,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291900992] [2024-09-13 10:00:37,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291900992] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:00:37,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620481599] [2024-09-13 10:00:37,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:37,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:37,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:37,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:00:37,184 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 10:00:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:37,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 10:00:37,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:00:37,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 15 [2024-09-13 10:00:37,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 10:00:37,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:00:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:00:38,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620481599] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:00:38,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:00:38,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 16] total 33 [2024-09-13 10:00:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541641508] [2024-09-13 10:00:38,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:00:38,173 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-13 10:00:38,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-13 10:00:38,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 10:00:38,174 INFO L87 Difference]: Start difference. First operand 211 states and 345 transitions. Second operand has 33 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 12 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-13 10:00:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:39,439 INFO L93 Difference]: Finished difference Result 251 states and 569 transitions. [2024-09-13 10:00:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 10:00:39,443 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 12 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 44 [2024-09-13 10:00:39,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:39,445 INFO L225 Difference]: With dead ends: 251 [2024-09-13 10:00:39,445 INFO L226 Difference]: Without dead ends: 237 [2024-09-13 10:00:39,446 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=374, Invalid=2076, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 10:00:39,446 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:39,446 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 174 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 10:00:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-09-13 10:00:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 211. [2024-09-13 10:00:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 151 states have (on average 1.3377483443708609) internal successors, (202), 173 states have internal predecessors, (202), 33 states have call successors, (33), 16 states have call predecessors, (33), 26 states have return successors, (115), 21 states have call predecessors, (115), 31 states have call successors, (115) [2024-09-13 10:00:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 350 transitions. [2024-09-13 10:00:39,529 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 350 transitions. Word has length 44 [2024-09-13 10:00:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:39,529 INFO L474 AbstractCegarLoop]: Abstraction has 211 states and 350 transitions. [2024-09-13 10:00:39,529 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 12 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-13 10:00:39,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 350 transitions. [2024-09-13 10:00:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 10:00:39,530 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:39,530 INFO L216 NwaCegarLoop]: trace histogram [3, 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] [2024-09-13 10:00:39,543 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 10:00:39,734 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:39,735 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:39,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:39,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1016093312, now seen corresponding path program 1 times [2024-09-13 10:00:39,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:39,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890963093] [2024-09-13 10:00:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:39,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:00:39,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511372886] [2024-09-13 10:00:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:39,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:39,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:39,753 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:00:39,754 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 10:00:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:39,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-13 10:00:39,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:00:39,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:00:39,887 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 [2024-09-13 10:00:39,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:39,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:00:39,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:00:39,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:40,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-13 10:00:40,356 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 15 [2024-09-13 10:00:40,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:00:40,380 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 15 treesize of output 7 [2024-09-13 10:00:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:00:40,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:00:41,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:41,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890963093] [2024-09-13 10:00:41,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:00:41,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511372886] [2024-09-13 10:00:41,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511372886] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:00:41,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:00:41,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-13 10:00:41,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653681474] [2024-09-13 10:00:41,019 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:00:41,020 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 10:00:41,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:41,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 10:00:41,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-09-13 10:00:41,021 INFO L87 Difference]: Start difference. First operand 211 states and 350 transitions. Second operand has 15 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 10:00:41,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:41,743 INFO L93 Difference]: Finished difference Result 224 states and 381 transitions. [2024-09-13 10:00:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 10:00:41,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-09-13 10:00:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:41,747 INFO L225 Difference]: With dead ends: 224 [2024-09-13 10:00:41,747 INFO L226 Difference]: Without dead ends: 222 [2024-09-13 10:00:41,748 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-09-13 10:00:41,748 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:41,748 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 117 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 10:00:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-13 10:00:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2024-09-13 10:00:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 157 states have (on average 1.3248407643312101) internal successors, (208), 179 states have internal predecessors, (208), 34 states have call successors, (34), 17 states have call predecessors, (34), 29 states have return successors, (136), 24 states have call predecessors, (136), 32 states have call successors, (136) [2024-09-13 10:00:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 378 transitions. [2024-09-13 10:00:41,833 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 378 transitions. Word has length 46 [2024-09-13 10:00:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:41,833 INFO L474 AbstractCegarLoop]: Abstraction has 221 states and 378 transitions. [2024-09-13 10:00:41,834 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 10:00:41,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 378 transitions. [2024-09-13 10:00:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 10:00:41,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:41,835 INFO L216 NwaCegarLoop]: trace histogram [3, 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, 1] [2024-09-13 10:00:41,847 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-13 10:00:42,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:42,039 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:42,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:42,039 INFO L85 PathProgramCache]: Analyzing trace with hash 264265128, now seen corresponding path program 1 times [2024-09-13 10:00:42,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:42,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204154638] [2024-09-13 10:00:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:42,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:00:42,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820196195] [2024-09-13 10:00:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:42,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:42,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:42,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:00:42,064 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 10:00:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:42,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-09-13 10:00:42,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:00:42,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:42,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:42,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:00:42,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:00:42,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:42,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:42,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:00:42,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:00:48,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2024-09-13 10:00:48,171 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 15 [2024-09-13 10:00:48,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:00:48,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 10:00:48,259 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 39 treesize of output 31 [2024-09-13 10:00:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:00:48,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:00:50,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 65 [2024-09-13 10:00:50,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2024-09-13 10:00:50,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2024-09-13 10:00:50,483 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 49 treesize of output 45 [2024-09-13 10:01:18,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:01:18,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204154638] [2024-09-13 10:01:18,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:01:18,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820196195] [2024-09-13 10:01:18,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820196195] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:01:18,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:01:18,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-13 10:01:18,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085069821] [2024-09-13 10:01:18,217 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:01:18,218 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-13 10:01:18,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:01:18,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-13 10:01:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1064, Unknown=4, NotChecked=0, Total=1190 [2024-09-13 10:01:18,219 INFO L87 Difference]: Start difference. First operand 221 states and 378 transitions. Second operand has 26 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 7 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 10:01:22,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 10:01:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:01:39,870 INFO L93 Difference]: Finished difference Result 266 states and 529 transitions. [2024-09-13 10:01:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 10:01:39,871 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 7 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2024-09-13 10:01:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:01:39,873 INFO L225 Difference]: With dead ends: 266 [2024-09-13 10:01:39,873 INFO L226 Difference]: Without dead ends: 254 [2024-09-13 10:01:39,874 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 47.4s TimeCoverageRelationStatistics Valid=269, Invalid=2175, Unknown=6, NotChecked=0, Total=2450 [2024-09-13 10:01:39,874 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:01:39,875 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 219 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 942 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2024-09-13 10:01:39,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-13 10:01:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2024-09-13 10:01:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 174 states have (on average 1.3505747126436782) internal successors, (235), 200 states have internal predecessors, (235), 38 states have call successors, (38), 17 states have call predecessors, (38), 32 states have return successors, (195), 27 states have call predecessors, (195), 36 states have call successors, (195) [2024-09-13 10:01:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 468 transitions. [2024-09-13 10:01:39,974 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 468 transitions. Word has length 48 [2024-09-13 10:01:39,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:01:39,975 INFO L474 AbstractCegarLoop]: Abstraction has 245 states and 468 transitions. [2024-09-13 10:01:39,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 7 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 10:01:39,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:01:39,975 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 468 transitions. [2024-09-13 10:01:39,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 10:01:39,976 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:01:39,976 INFO L216 NwaCegarLoop]: trace histogram [3, 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] [2024-09-13 10:01:39,989 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 10:01:40,180 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 10:01:40,181 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:01:40,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:01:40,181 INFO L85 PathProgramCache]: Analyzing trace with hash -436799450, now seen corresponding path program 1 times [2024-09-13 10:01:40,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:01:40,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676749939] [2024-09-13 10:01:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:01:40,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:01:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:01:40,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171382354] [2024-09-13 10:01:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:01:40,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:01:40,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:01:40,203 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:01:40,206 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 10:01:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:40,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-09-13 10:01:40,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:01:40,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:01:40,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:01:40,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:01:40,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:01:40,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:01:40,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:01:41,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2024-09-13 10:01:41,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-13 10:01:41,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:01:41,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-09-13 10:01:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:01:41,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:01:42,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:01:42,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676749939] [2024-09-13 10:01:42,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:01:42,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171382354] [2024-09-13 10:01:42,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171382354] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:01:42,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:01:42,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 10:01:42,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14610491] [2024-09-13 10:01:42,718 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:01:42,719 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 10:01:42,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:01:42,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 10:01:42,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:01:42,719 INFO L87 Difference]: Start difference. First operand 245 states and 468 transitions. Second operand has 20 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 10:01:47,654 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse8 (select |c_old(#memory_int#6)| |c_func_to_recursive_line_0_to_51_0_#in~a.base|)) (.cse4 (select |c_old(#memory_int#5)| |c_func_to_recursive_line_0_to_51_0_#in~q.base|)) (.cse7 (select |c_old(#memory_int#6)| c_func_to_recursive_line_0_to_51_0_~a.base))) (let ((.cse0 (select .cse7 c_func_to_recursive_line_0_to_51_0_~a.offset)) (.cse6 (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_0_to_51_0_#in~p.base|) |c_func_to_recursive_line_0_to_51_0_#in~p.offset|)) (.cse5 (select .cse4 |c_func_to_recursive_line_0_to_51_0_#in~q.offset|)) (.cse1 (select .cse8 |c_func_to_recursive_line_0_to_51_0_#in~a.offset|))) (and (<= 1 .cse0) (= |c_func_to_recursive_line_0_to_51_0_#in~b.base| c_func_to_recursive_line_0_to_51_0_~b.base) (<= 1 .cse1) (= c_func_to_recursive_line_0_to_51_0_~a.base |c_func_to_recursive_line_0_to_51_0_#in~a.base|) (= |c_#memory_int#4| (store |c_old(#memory_int#4)| |c_func_to_recursive_line_0_to_51_0_#in~b.base| (let ((.cse2 (select |c_old(#memory_int#4)| |c_func_to_recursive_line_0_to_51_0_#in~b.base|))) (store .cse2 |c_func_to_recursive_line_0_to_51_0_#in~b.offset| (+ (- 1) (select .cse2 |c_func_to_recursive_line_0_to_51_0_#in~b.offset|)))))) (= (select (select |c_#memory_int#4| |c_func_to_recursive_line_0_to_51_0_#in~b.base|) |c_func_to_recursive_line_0_to_51_0_#in~b.offset|) 0) (= |c_#memory_int#4| (store |c_old(#memory_int#4)| c_func_to_recursive_line_0_to_51_0_~b.base (let ((.cse3 (select |c_old(#memory_int#4)| c_func_to_recursive_line_0_to_51_0_~b.base))) (store .cse3 c_func_to_recursive_line_0_to_51_0_~b.offset (+ (- 1) (select .cse3 c_func_to_recursive_line_0_to_51_0_~b.offset)))))) (= c_func_to_recursive_line_0_to_51_0_~b.offset |c_func_to_recursive_line_0_to_51_0_#in~b.offset|) (= |c_#memory_int#5| (store |c_old(#memory_int#5)| |c_func_to_recursive_line_0_to_51_0_#in~q.base| (store .cse4 |c_func_to_recursive_line_0_to_51_0_#in~q.offset| (+ .cse5 (* .cse6 .cse1))))) (= |c_#memory_int#6| (store |c_old(#memory_int#6)| c_func_to_recursive_line_0_to_51_0_~a.base (store .cse7 c_func_to_recursive_line_0_to_51_0_~a.offset (+ (- 1) .cse0)))) (= |c_func_to_recursive_line_0_to_51_0_#in~a.offset| c_func_to_recursive_line_0_to_51_0_~a.offset) (= |c_#memory_int#5| (store |c_old(#memory_int#5)| |c_func_to_recursive_line_0_to_51_0_#in~q.base| (store .cse4 |c_func_to_recursive_line_0_to_51_0_#in~q.offset| (+ (* .cse6 (+ (select (select |c_#memory_int#6| c_func_to_recursive_line_0_to_51_0_~a.base) c_func_to_recursive_line_0_to_51_0_~a.offset) 1 (select (select |c_#memory_int#4| c_func_to_recursive_line_0_to_51_0_~b.base) c_func_to_recursive_line_0_to_51_0_~b.offset))) .cse5)))) (not (= (select (select |c_#memory_int#6| |c_func_to_recursive_line_0_to_51_0_#in~a.base|) |c_func_to_recursive_line_0_to_51_0_#in~a.offset|) 0)) (= |c_#memory_int#6| (store |c_old(#memory_int#6)| |c_func_to_recursive_line_0_to_51_0_#in~a.base| (store .cse8 |c_func_to_recursive_line_0_to_51_0_#in~a.offset| (+ (- 1) .cse1))))))) is different from true [2024-09-13 10:01:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:01:47,868 INFO L93 Difference]: Finished difference Result 256 states and 487 transitions. [2024-09-13 10:01:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 10:01:47,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2024-09-13 10:01:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:01:47,871 INFO L225 Difference]: With dead ends: 256 [2024-09-13 10:01:47,871 INFO L226 Difference]: Without dead ends: 254 [2024-09-13 10:01:47,872 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=112, Invalid=703, Unknown=1, NotChecked=54, Total=870 [2024-09-13 10:01:47,872 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 10:01:47,872 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 169 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 883 Invalid, 0 Unknown, 17 Unchecked, 0.9s Time] [2024-09-13 10:01:47,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-13 10:01:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 243. [2024-09-13 10:01:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 173 states have (on average 1.3526011560693643) internal successors, (234), 199 states have internal predecessors, (234), 38 states have call successors, (38), 17 states have call predecessors, (38), 31 states have return successors, (184), 26 states have call predecessors, (184), 36 states have call successors, (184) [2024-09-13 10:01:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 456 transitions. [2024-09-13 10:01:47,973 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 456 transitions. Word has length 48 [2024-09-13 10:01:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:01:47,973 INFO L474 AbstractCegarLoop]: Abstraction has 243 states and 456 transitions. [2024-09-13 10:01:47,973 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 10:01:47,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:01:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 456 transitions. [2024-09-13 10:01:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 10:01:47,974 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:01:47,974 INFO L216 NwaCegarLoop]: trace histogram [3, 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, 1] [2024-09-13 10:01:47,988 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 10:01:48,178 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 10:01:48,178 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:01:48,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:01:48,179 INFO L85 PathProgramCache]: Analyzing trace with hash 130251622, now seen corresponding path program 1 times [2024-09-13 10:01:48,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:01:48,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694617841] [2024-09-13 10:01:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:01:48,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:01:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:48,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:01:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:48,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:01:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:48,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:01:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:48,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:01:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:48,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:01:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:48,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:01:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 10:01:48,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:01:48,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694617841] [2024-09-13 10:01:48,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694617841] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:01:48,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:01:48,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-13 10:01:48,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041258703] [2024-09-13 10:01:48,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:01:48,580 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 10:01:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:01:48,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 10:01:48,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-13 10:01:48,580 INFO L87 Difference]: Start difference. First operand 243 states and 456 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-13 10:01:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:01:48,969 INFO L93 Difference]: Finished difference Result 282 states and 777 transitions. [2024-09-13 10:01:48,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 10:01:48,969 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-09-13 10:01:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:01:48,974 INFO L225 Difference]: With dead ends: 282 [2024-09-13 10:01:48,974 INFO L226 Difference]: Without dead ends: 268 [2024-09-13 10:01:48,975 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:01:48,975 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 58 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:01:48,975 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 100 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:01:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-09-13 10:01:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 235. [2024-09-13 10:01:49,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 169 states have (on average 1.3372781065088757) internal successors, (226), 191 states have internal predecessors, (226), 34 states have call successors, (34), 17 states have call predecessors, (34), 31 states have return successors, (152), 26 states have call predecessors, (152), 32 states have call successors, (152) [2024-09-13 10:01:49,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 412 transitions. [2024-09-13 10:01:49,099 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 412 transitions. Word has length 48 [2024-09-13 10:01:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:01:49,100 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 412 transitions. [2024-09-13 10:01:49,100 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-13 10:01:49,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:01:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 412 transitions. [2024-09-13 10:01:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 10:01:49,101 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:01:49,101 INFO L216 NwaCegarLoop]: trace histogram [3, 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] [2024-09-13 10:01:49,101 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-09-13 10:01:49,101 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:01:49,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:01:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash -570812956, now seen corresponding path program 1 times [2024-09-13 10:01:49,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:01:49,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767507894] [2024-09-13 10:01:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:01:49,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:01:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:01:49,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251652156] [2024-09-13 10:01:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:01:49,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:01:49,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:01:49,133 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:01:49,134 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 10:01:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:49,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-13 10:01:49,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:01:49,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:01:49,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:01:49,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:01:49,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:01:49,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:01:49,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:01:49,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:01:50,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2024-09-13 10:01:50,150 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 15 [2024-09-13 10:01:50,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:01:50,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2024-09-13 10:01:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:01:50,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:01:51,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:01:51,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767507894] [2024-09-13 10:01:51,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:01:51,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251652156] [2024-09-13 10:01:51,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251652156] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:01:51,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:01:51,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 10:01:51,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693489744] [2024-09-13 10:01:51,247 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:01:51,247 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 10:01:51,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:01:51,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 10:01:51,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-09-13 10:01:51,248 INFO L87 Difference]: Start difference. First operand 235 states and 412 transitions. Second operand has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 10:01:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:01:52,304 INFO L93 Difference]: Finished difference Result 252 states and 479 transitions. [2024-09-13 10:01:52,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 10:01:52,305 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2024-09-13 10:01:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:01:52,307 INFO L225 Difference]: With dead ends: 252 [2024-09-13 10:01:52,307 INFO L226 Difference]: Without dead ends: 250 [2024-09-13 10:01:52,307 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2024-09-13 10:01:52,308 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 10:01:52,308 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 173 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 10:01:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-09-13 10:01:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 239. [2024-09-13 10:01:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 169 states have (on average 1.3372781065088757) internal successors, (226), 195 states have internal predecessors, (226), 38 states have call successors, (38), 17 states have call predecessors, (38), 31 states have return successors, (180), 26 states have call predecessors, (180), 36 states have call successors, (180) [2024-09-13 10:01:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 444 transitions. [2024-09-13 10:01:52,414 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 444 transitions. Word has length 48 [2024-09-13 10:01:52,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:01:52,415 INFO L474 AbstractCegarLoop]: Abstraction has 239 states and 444 transitions. [2024-09-13 10:01:52,415 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 10:01:52,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:01:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 444 transitions. [2024-09-13 10:01:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 10:01:52,416 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:01:52,416 INFO L216 NwaCegarLoop]: trace histogram [3, 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] [2024-09-13 10:01:52,431 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 10:01:52,616 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 10:01:52,617 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:01:52,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:01:52,617 INFO L85 PathProgramCache]: Analyzing trace with hash -789667674, now seen corresponding path program 1 times [2024-09-13 10:01:52,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:01:52,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73463064] [2024-09-13 10:01:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:01:52,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:01:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:52,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:01:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:52,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:01:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:52,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:01:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:52,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:01:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:52,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:01:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:53,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:01:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 10:01:53,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:01:53,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73463064] [2024-09-13 10:01:53,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73463064] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:01:53,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:01:53,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 10:01:53,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551210083] [2024-09-13 10:01:53,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:01:53,036 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 10:01:53,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:01:53,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 10:01:53,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-13 10:01:53,036 INFO L87 Difference]: Start difference. First operand 239 states and 444 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-13 10:01:53,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:01:53,387 INFO L93 Difference]: Finished difference Result 289 states and 792 transitions. [2024-09-13 10:01:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 10:01:53,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-09-13 10:01:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:01:53,391 INFO L225 Difference]: With dead ends: 289 [2024-09-13 10:01:53,391 INFO L226 Difference]: Without dead ends: 265 [2024-09-13 10:01:53,392 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-09-13 10:01:53,392 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 44 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:01:53,393 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 82 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:01:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-09-13 10:01:53,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 245. [2024-09-13 10:01:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 169 states have (on average 1.3372781065088757) internal successors, (226), 201 states have internal predecessors, (226), 44 states have call successors, (44), 17 states have call predecessors, (44), 31 states have return successors, (209), 26 states have call predecessors, (209), 42 states have call successors, (209) [2024-09-13 10:01:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 479 transitions. [2024-09-13 10:01:53,519 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 479 transitions. Word has length 48 [2024-09-13 10:01:53,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:01:53,520 INFO L474 AbstractCegarLoop]: Abstraction has 245 states and 479 transitions. [2024-09-13 10:01:53,520 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-13 10:01:53,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:01:53,521 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 479 transitions. [2024-09-13 10:01:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 10:01:53,522 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:01:53,522 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:01:53,522 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-09-13 10:01:53,522 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:01:53,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:01:53,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1737609081, now seen corresponding path program 1 times [2024-09-13 10:01:53,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:01:53,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271983834] [2024-09-13 10:01:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:01:53,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:01:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:01:53,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34295764] [2024-09-13 10:01:53,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:01:53,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:01:53,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:01:53,557 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:01:53,560 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 10:01:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:01:53,799 WARN L260 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 230 conjuncts are in the unsatisfiable core [2024-09-13 10:01:53,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:01:53,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:01:53,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:01:53,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:01:53,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:01:53,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:01:53,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:01:54,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-13 10:01:54,233 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 36 treesize of output 20 [2024-09-13 10:01:54,778 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 55 treesize of output 31 [2024-09-13 10:01:54,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:01:54,796 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 57 treesize of output 33 [2024-09-13 10:01:54,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2024-09-13 10:01:54,979 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 19 treesize of output 11 [2024-09-13 10:01:54,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-13 10:01:54,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2024-09-13 10:01:54,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:01:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:01:56,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:02:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:02:14,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:02:14,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271983834] [2024-09-13 10:02:14,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:02:14,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34295764] [2024-09-13 10:02:14,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34295764] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:02:14,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 10:02:14,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2024-09-13 10:02:14,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694284674] [2024-09-13 10:02:14,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 10:02:14,597 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-13 10:02:14,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:02:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-13 10:02:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 10:02:14,598 INFO L87 Difference]: Start difference. First operand 245 states and 479 transitions. Second operand has 35 states, 31 states have (on average 1.903225806451613) internal successors, (59), 28 states have internal predecessors, (59), 11 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 10:02:19,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 10:02:41,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 10:02:43,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:02:43,501 INFO L93 Difference]: Finished difference Result 363 states and 692 transitions. [2024-09-13 10:02:43,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-13 10:02:43,502 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 1.903225806451613) internal successors, (59), 28 states have internal predecessors, (59), 11 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2024-09-13 10:02:43,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:02:43,505 INFO L225 Difference]: With dead ends: 363 [2024-09-13 10:02:43,505 INFO L226 Difference]: Without dead ends: 355 [2024-09-13 10:02:43,506 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=655, Invalid=3377, Unknown=0, NotChecked=0, Total=4032 [2024-09-13 10:02:43,507 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 150 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:02:43,507 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 640 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1462 Invalid, 1 Unknown, 0 Unchecked, 13.2s Time] [2024-09-13 10:02:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-09-13 10:02:43,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 283. [2024-09-13 10:02:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 198 states have (on average 1.3282828282828283) internal successors, (263), 230 states have internal predecessors, (263), 46 states have call successors, (46), 22 states have call predecessors, (46), 38 states have return successors, (239), 30 states have call predecessors, (239), 44 states have call successors, (239) [2024-09-13 10:02:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 548 transitions. [2024-09-13 10:02:43,674 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 548 transitions. Word has length 48 [2024-09-13 10:02:43,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:02:43,674 INFO L474 AbstractCegarLoop]: Abstraction has 283 states and 548 transitions. [2024-09-13 10:02:43,674 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 1.903225806451613) internal successors, (59), 28 states have internal predecessors, (59), 11 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 10:02:43,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:02:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 548 transitions. [2024-09-13 10:02:43,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 10:02:43,677 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:02:43,677 INFO L216 NwaCegarLoop]: trace histogram [3, 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] [2024-09-13 10:02:43,694 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 10:02:43,877 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:02:43,878 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:02:43,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:02:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1274409114, now seen corresponding path program 1 times [2024-09-13 10:02:43,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:02:43,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617980643] [2024-09-13 10:02:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:02:43,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:02:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:02:43,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180968136] [2024-09-13 10:02:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:02:43,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:02:43,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:02:43,911 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:02:43,912 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 10:02:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:44,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-09-13 10:02:44,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:02:44,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:02:44,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:02:44,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:02:44,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:02:44,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:02:44,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:02:44,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:02:45,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2024-09-13 10:02:45,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-13 10:02:45,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2024-09-13 10:02:45,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:02:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:02:45,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:02:46,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:02:46,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617980643] [2024-09-13 10:02:46,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:02:46,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180968136] [2024-09-13 10:02:46,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180968136] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:02:46,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:02:46,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-13 10:02:46,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510076767] [2024-09-13 10:02:46,610 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:02:46,611 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 10:02:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:02:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 10:02:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2024-09-13 10:02:46,611 INFO L87 Difference]: Start difference. First operand 283 states and 548 transitions. Second operand has 24 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 10:02:50,675 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] [2024-09-13 10:02:51,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:02:51,987 INFO L93 Difference]: Finished difference Result 306 states and 635 transitions. [2024-09-13 10:02:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 10:02:51,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2024-09-13 10:02:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:02:51,995 INFO L225 Difference]: With dead ends: 306 [2024-09-13 10:02:51,995 INFO L226 Difference]: Without dead ends: 294 [2024-09-13 10:02:51,997 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 10:02:51,998 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-13 10:02:51,998 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 202 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 781 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2024-09-13 10:02:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-09-13 10:02:52,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 287. [2024-09-13 10:02:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 199 states have (on average 1.3266331658291457) internal successors, (264), 233 states have internal predecessors, (264), 48 states have call successors, (48), 22 states have call predecessors, (48), 39 states have return successors, (266), 31 states have call predecessors, (266), 46 states have call successors, (266) [2024-09-13 10:02:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 578 transitions. [2024-09-13 10:02:52,184 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 578 transitions. Word has length 48 [2024-09-13 10:02:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:02:52,184 INFO L474 AbstractCegarLoop]: Abstraction has 287 states and 578 transitions. [2024-09-13 10:02:52,184 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 10:02:52,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:02:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 578 transitions. [2024-09-13 10:02:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-13 10:02:52,186 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:02:52,186 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:02:52,202 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-13 10:02:52,390 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:02:52,391 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:02:52,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:02:52,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1998120079, now seen corresponding path program 1 times [2024-09-13 10:02:52,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:02:52,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341764234] [2024-09-13 10:02:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:02:52,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:02:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:52,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:02:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:52,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:02:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:52,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:02:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:53,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:02:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:53,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:02:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:53,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:02:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:53,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 10:02:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:53,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:02:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 10:02:53,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:02:53,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341764234] [2024-09-13 10:02:53,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341764234] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:02:53,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905415807] [2024-09-13 10:02:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:02:53,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:02:53,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:02:53,285 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:02:53,288 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 10:02:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:53,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-13 10:02:53,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:02:53,497 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 35 treesize of output 19 [2024-09-13 10:02:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-13 10:02:53,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:02:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-13 10:02:53,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905415807] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:02:53,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:02:53,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-13 10:02:53,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115594471] [2024-09-13 10:02:53,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:02:53,777 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 10:02:53,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:02:53,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 10:02:53,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:02:53,778 INFO L87 Difference]: Start difference. First operand 287 states and 578 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 14 states have internal predecessors, (50), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-13 10:02:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:02:54,242 INFO L93 Difference]: Finished difference Result 309 states and 754 transitions. [2024-09-13 10:02:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 10:02:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 14 states have internal predecessors, (50), 5 states have call successors, (14), 5 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 63 [2024-09-13 10:02:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:02:54,245 INFO L225 Difference]: With dead ends: 309 [2024-09-13 10:02:54,245 INFO L226 Difference]: Without dead ends: 277 [2024-09-13 10:02:54,247 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2024-09-13 10:02:54,247 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 106 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:02:54,248 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 73 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:02:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-09-13 10:02:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 162. [2024-09-13 10:02:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 114 states have (on average 1.3157894736842106) internal successors, (150), 129 states have internal predecessors, (150), 26 states have call successors, (26), 14 states have call predecessors, (26), 21 states have return successors, (75), 18 states have call predecessors, (75), 24 states have call successors, (75) [2024-09-13 10:02:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 251 transitions. [2024-09-13 10:02:54,351 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 251 transitions. Word has length 63 [2024-09-13 10:02:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:02:54,352 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 251 transitions. [2024-09-13 10:02:54,352 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 14 states have internal predecessors, (50), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-13 10:02:54,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:02:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 251 transitions. [2024-09-13 10:02:54,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 10:02:54,354 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:02:54,354 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:02:54,370 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 10:02:54,554 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:02:54,555 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:02:54,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:02:54,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1422878435, now seen corresponding path program 1 times [2024-09-13 10:02:54,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:02:54,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444974204] [2024-09-13 10:02:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:02:54,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:02:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:02:54,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166456621] [2024-09-13 10:02:54,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:02:54,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:02:54,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:02:54,591 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:02:54,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 10:02:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:54,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-09-13 10:02:54,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:02:54,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:02:54,757 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 [2024-09-13 10:02:54,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:02:55,095 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 17 treesize of output 9 [2024-09-13 10:02:55,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:02:55,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-09-13 10:02:55,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-09-13 10:02:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:02:55,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:02:55,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:02:55,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444974204] [2024-09-13 10:02:55,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:02:55,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166456621] [2024-09-13 10:02:55,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166456621] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:02:55,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:02:55,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 10:02:55,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780235280] [2024-09-13 10:02:55,587 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:02:55,587 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 10:02:55,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:02:55,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 10:02:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2024-09-13 10:02:55,588 INFO L87 Difference]: Start difference. First operand 162 states and 251 transitions. Second operand has 21 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 10:02:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:02:57,003 INFO L93 Difference]: Finished difference Result 208 states and 385 transitions. [2024-09-13 10:02:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 10:02:57,003 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 54 [2024-09-13 10:02:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:02:57,005 INFO L225 Difference]: With dead ends: 208 [2024-09-13 10:02:57,006 INFO L226 Difference]: Without dead ends: 194 [2024-09-13 10:02:57,006 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 10:02:57,007 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 71 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 10:02:57,007 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 244 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1022 Invalid, 3 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 10:02:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-09-13 10:02:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 170. [2024-09-13 10:02:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 118 states have (on average 1.305084745762712) internal successors, (154), 133 states have internal predecessors, (154), 27 states have call successors, (27), 14 states have call predecessors, (27), 24 states have return successors, (104), 22 states have call predecessors, (104), 24 states have call successors, (104) [2024-09-13 10:02:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 285 transitions. [2024-09-13 10:02:57,188 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 285 transitions. Word has length 54 [2024-09-13 10:02:57,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:02:57,188 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 285 transitions. [2024-09-13 10:02:57,189 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 10:02:57,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:02:57,189 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 285 transitions. [2024-09-13 10:02:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-13 10:02:57,190 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:02:57,190 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:02:57,204 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-13 10:02:57,394 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-13 10:02:57,394 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:02:57,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:02:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2060506709, now seen corresponding path program 1 times [2024-09-13 10:02:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:02:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134759771] [2024-09-13 10:02:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:02:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:02:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:57,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:02:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:57,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:02:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:57,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:02:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:58,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:02:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:58,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:02:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:58,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:02:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:58,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 10:02:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:58,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:02:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-13 10:02:58,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:02:58,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134759771] [2024-09-13 10:02:58,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134759771] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:02:58,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472317968] [2024-09-13 10:02:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:02:58,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:02:58,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:02:58,441 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:02:58,446 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 10:02:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:58,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 10:02:58,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:02:58,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-13 10:02:58,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:02:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 10:02:58,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:02:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 10:02:59,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472317968] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:02:59,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:02:59,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2024-09-13 10:02:59,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291492577] [2024-09-13 10:02:59,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:02:59,353 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 10:02:59,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:02:59,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 10:02:59,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2024-09-13 10:02:59,355 INFO L87 Difference]: Start difference. First operand 170 states and 285 transitions. Second operand has 30 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-13 10:03:01,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:01,798 INFO L93 Difference]: Finished difference Result 406 states and 1278 transitions. [2024-09-13 10:03:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-13 10:03:01,798 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) Word has length 65 [2024-09-13 10:03:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:01,803 INFO L225 Difference]: With dead ends: 406 [2024-09-13 10:03:01,804 INFO L226 Difference]: Without dead ends: 300 [2024-09-13 10:03:01,805 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=401, Invalid=3139, Unknown=0, NotChecked=0, Total=3540 [2024-09-13 10:03:01,806 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 124 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:01,806 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 307 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-13 10:03:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-09-13 10:03:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 250. [2024-09-13 10:03:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 167 states have (on average 1.341317365269461) internal successors, (224), 200 states have internal predecessors, (224), 47 states have call successors, (47), 16 states have call predecessors, (47), 35 states have return successors, (371), 33 states have call predecessors, (371), 44 states have call successors, (371) [2024-09-13 10:03:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 642 transitions. [2024-09-13 10:03:01,994 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 642 transitions. Word has length 65 [2024-09-13 10:03:01,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:01,995 INFO L474 AbstractCegarLoop]: Abstraction has 250 states and 642 transitions. [2024-09-13 10:03:01,995 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-13 10:03:01,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:01,996 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 642 transitions. [2024-09-13 10:03:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 10:03:01,997 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:01,997 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, 1, 1, 1, 1, 1] [2024-09-13 10:03:02,011 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-13 10:03:02,201 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:02,202 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:02,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:02,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1521485639, now seen corresponding path program 1 times [2024-09-13 10:03:02,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:02,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786637125] [2024-09-13 10:03:02,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:02,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:03:02,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250238244] [2024-09-13 10:03:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:02,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:02,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:03:02,228 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:03:02,229 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 10:03:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:02,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 10:03:02,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:03:02,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 15 [2024-09-13 10:03:02,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:03:02,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-09-13 10:03:02,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:03:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:03:02,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:03:02,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:02,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786637125] [2024-09-13 10:03:02,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:03:02,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250238244] [2024-09-13 10:03:02,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250238244] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:03:02,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:03:02,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-13 10:03:02,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839033714] [2024-09-13 10:03:02,861 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:03:02,862 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 10:03:02,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:02,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 10:03:02,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2024-09-13 10:03:02,863 INFO L87 Difference]: Start difference. First operand 250 states and 642 transitions. Second operand has 24 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 10:03:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:03,705 INFO L93 Difference]: Finished difference Result 272 states and 663 transitions. [2024-09-13 10:03:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 10:03:03,708 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 52 [2024-09-13 10:03:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:03,711 INFO L225 Difference]: With dead ends: 272 [2024-09-13 10:03:03,711 INFO L226 Difference]: Without dead ends: 256 [2024-09-13 10:03:03,712 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2024-09-13 10:03:03,713 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 91 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:03,713 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 167 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 741 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 10:03:03,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-09-13 10:03:03,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 254. [2024-09-13 10:03:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 170 states have (on average 1.3352941176470587) internal successors, (227), 202 states have internal predecessors, (227), 48 states have call successors, (48), 17 states have call predecessors, (48), 35 states have return successors, (370), 34 states have call predecessors, (370), 44 states have call successors, (370) [2024-09-13 10:03:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 645 transitions. [2024-09-13 10:03:03,900 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 645 transitions. Word has length 52 [2024-09-13 10:03:03,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:03,900 INFO L474 AbstractCegarLoop]: Abstraction has 254 states and 645 transitions. [2024-09-13 10:03:03,900 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 10:03:03,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:03,901 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 645 transitions. [2024-09-13 10:03:03,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-13 10:03:03,902 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:03,902 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-13 10:03:03,918 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-13 10:03:04,102 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:04,103 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:04,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:04,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1590925951, now seen corresponding path program 2 times [2024-09-13 10:03:04,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:04,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372640309] [2024-09-13 10:03:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:04,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:04,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:03:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:04,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:03:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:04,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:03:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:04,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:04,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 10:03:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:04,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:04,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 10:03:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:04,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 10:03:04,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:04,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372640309] [2024-09-13 10:03:04,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372640309] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:03:04,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382141441] [2024-09-13 10:03:04,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:03:04,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:04,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:03:04,840 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:03:04,841 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 10:03:05,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:03:05,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:03:05,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-13 10:03:05,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:03:05,094 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 34 treesize of output 18 [2024-09-13 10:03:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-13 10:03:05,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:03:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 10:03:05,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382141441] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:03:05,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:03:05,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 15] total 32 [2024-09-13 10:03:05,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102480241] [2024-09-13 10:03:05,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:03:05,828 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 10:03:05,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:05,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 10:03:05,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2024-09-13 10:03:05,829 INFO L87 Difference]: Start difference. First operand 254 states and 645 transitions. Second operand has 32 states, 27 states have (on average 2.740740740740741) internal successors, (74), 28 states have internal predecessors, (74), 12 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-13 10:03:07,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:07,163 INFO L93 Difference]: Finished difference Result 379 states and 2000 transitions. [2024-09-13 10:03:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-13 10:03:07,163 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 2.740740740740741) internal successors, (74), 28 states have internal predecessors, (74), 12 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) Word has length 63 [2024-09-13 10:03:07,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:07,180 INFO L225 Difference]: With dead ends: 379 [2024-09-13 10:03:07,180 INFO L226 Difference]: Without dead ends: 333 [2024-09-13 10:03:07,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=2365, Unknown=0, NotChecked=0, Total=2970 [2024-09-13 10:03:07,183 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 131 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:07,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 205 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 10:03:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-09-13 10:03:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 275. [2024-09-13 10:03:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 178 states have (on average 1.3202247191011236) internal successors, (235), 214 states have internal predecessors, (235), 50 states have call successors, (50), 16 states have call predecessors, (50), 46 states have return successors, (536), 44 states have call predecessors, (536), 47 states have call successors, (536) [2024-09-13 10:03:07,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 821 transitions. [2024-09-13 10:03:07,479 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 821 transitions. Word has length 63 [2024-09-13 10:03:07,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:07,480 INFO L474 AbstractCegarLoop]: Abstraction has 275 states and 821 transitions. [2024-09-13 10:03:07,480 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 2.740740740740741) internal successors, (74), 28 states have internal predecessors, (74), 12 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-13 10:03:07,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:07,480 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 821 transitions. [2024-09-13 10:03:07,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 10:03:07,482 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:07,482 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:03:07,495 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-13 10:03:07,685 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-13 10:03:07,685 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:07,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1435701663, now seen corresponding path program 1 times [2024-09-13 10:03:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:07,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194785373] [2024-09-13 10:03:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:07,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:03:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:07,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:03:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:07,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:03:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:08,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:08,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:03:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:08,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:08,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-13 10:03:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 10:03:08,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:08,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194785373] [2024-09-13 10:03:08,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194785373] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:03:08,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:03:08,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 10:03:08,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484248442] [2024-09-13 10:03:08,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:03:08,054 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:03:08,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:08,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:03:08,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:03:08,056 INFO L87 Difference]: Start difference. First operand 275 states and 821 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 10:03:09,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 10:03:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:09,456 INFO L93 Difference]: Finished difference Result 495 states and 1698 transitions. [2024-09-13 10:03:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 10:03:09,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2024-09-13 10:03:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:09,460 INFO L225 Difference]: With dead ends: 495 [2024-09-13 10:03:09,460 INFO L226 Difference]: Without dead ends: 257 [2024-09-13 10:03:09,463 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-09-13 10:03:09,463 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:09,464 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-13 10:03:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-09-13 10:03:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2024-09-13 10:03:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 168 states have (on average 1.2738095238095237) internal successors, (214), 197 states have internal predecessors, (214), 43 states have call successors, (43), 16 states have call predecessors, (43), 43 states have return successors, (412), 41 states have call predecessors, (412), 40 states have call successors, (412) [2024-09-13 10:03:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 669 transitions. [2024-09-13 10:03:09,662 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 669 transitions. Word has length 54 [2024-09-13 10:03:09,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:09,663 INFO L474 AbstractCegarLoop]: Abstraction has 255 states and 669 transitions. [2024-09-13 10:03:09,663 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 10:03:09,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 669 transitions. [2024-09-13 10:03:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 10:03:09,664 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:09,664 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:03:09,665 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-09-13 10:03:09,665 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:09,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:09,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1458333917, now seen corresponding path program 1 times [2024-09-13 10:03:09,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:09,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068077967] [2024-09-13 10:03:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:09,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:09,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:03:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:09,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:03:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:09,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:03:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:09,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:09,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:03:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:09,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:09,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-13 10:03:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 10:03:09,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:09,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068077967] [2024-09-13 10:03:09,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068077967] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:03:09,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:03:09,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 10:03:09,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689608516] [2024-09-13 10:03:09,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:03:09,948 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:03:09,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:09,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:03:09,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:03:09,948 INFO L87 Difference]: Start difference. First operand 255 states and 669 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 10:03:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:10,251 INFO L93 Difference]: Finished difference Result 453 states and 1282 transitions. [2024-09-13 10:03:10,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:03:10,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2024-09-13 10:03:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:10,255 INFO L225 Difference]: With dead ends: 453 [2024-09-13 10:03:10,255 INFO L226 Difference]: Without dead ends: 231 [2024-09-13 10:03:10,257 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-13 10:03:10,257 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:10,258 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 55 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:03:10,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-09-13 10:03:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2024-09-13 10:03:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 154 states have (on average 1.2207792207792207) internal successors, (188), 174 states have internal predecessors, (188), 34 states have call successors, (34), 16 states have call predecessors, (34), 38 states have return successors, (234), 36 states have call predecessors, (234), 31 states have call successors, (234) [2024-09-13 10:03:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 456 transitions. [2024-09-13 10:03:10,409 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 456 transitions. Word has length 54 [2024-09-13 10:03:10,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:10,409 INFO L474 AbstractCegarLoop]: Abstraction has 227 states and 456 transitions. [2024-09-13 10:03:10,409 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 10:03:10,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 456 transitions. [2024-09-13 10:03:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 10:03:10,410 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:10,411 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:03:10,411 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-09-13 10:03:10,411 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:10,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:10,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1183574303, now seen corresponding path program 1 times [2024-09-13 10:03:10,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:10,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822140962] [2024-09-13 10:03:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:10,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:03:10,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292146965] [2024-09-13 10:03:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:10,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:10,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:03:10,432 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:03:10,433 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 10:03:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:10,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 10:03:10,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:03:10,646 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 8 treesize of output 1 [2024-09-13 10:03:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:03:10,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:03:11,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:11,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822140962] [2024-09-13 10:03:11,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:03:11,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292146965] [2024-09-13 10:03:11,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292146965] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:03:11,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:03:11,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-13 10:03:11,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612011964] [2024-09-13 10:03:11,062 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:03:11,062 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 10:03:11,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:11,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 10:03:11,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:03:11,063 INFO L87 Difference]: Start difference. First operand 227 states and 456 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-13 10:03:11,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:11,538 INFO L93 Difference]: Finished difference Result 257 states and 554 transitions. [2024-09-13 10:03:11,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 10:03:11,539 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 54 [2024-09-13 10:03:11,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:11,541 INFO L225 Difference]: With dead ends: 257 [2024-09-13 10:03:11,541 INFO L226 Difference]: Without dead ends: 237 [2024-09-13 10:03:11,542 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-09-13 10:03:11,542 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 13 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:11,543 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 133 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 367 Invalid, 4 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:03:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-09-13 10:03:11,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 231. [2024-09-13 10:03:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 157 states have (on average 1.2101910828025477) internal successors, (190), 175 states have internal predecessors, (190), 34 states have call successors, (34), 17 states have call predecessors, (34), 39 states have return successors, (286), 38 states have call predecessors, (286), 31 states have call successors, (286) [2024-09-13 10:03:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 510 transitions. [2024-09-13 10:03:11,743 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 510 transitions. Word has length 54 [2024-09-13 10:03:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:11,744 INFO L474 AbstractCegarLoop]: Abstraction has 231 states and 510 transitions. [2024-09-13 10:03:11,744 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-13 10:03:11,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 510 transitions. [2024-09-13 10:03:11,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-13 10:03:11,746 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:11,746 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:03:11,760 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-13 10:03:11,950 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-13 10:03:11,951 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:11,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:11,951 INFO L85 PathProgramCache]: Analyzing trace with hash -682253735, now seen corresponding path program 1 times [2024-09-13 10:03:11,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:11,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637497757] [2024-09-13 10:03:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:11,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:12,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:03:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:12,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:03:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:12,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:03:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:12,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:12,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:03:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:12,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:12,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 10:03:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:12,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 10:03:12,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:12,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637497757] [2024-09-13 10:03:12,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637497757] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:03:12,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982095393] [2024-09-13 10:03:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:12,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:12,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:03:12,797 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:03:12,798 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 10:03:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:12,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 10:03:12,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:03:13,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-09-13 10:03:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 10:03:13,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:03:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 10:03:13,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982095393] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:03:13,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:03:13,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 31 [2024-09-13 10:03:13,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634892733] [2024-09-13 10:03:13,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:03:13,640 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-13 10:03:13,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:13,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-13 10:03:13,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2024-09-13 10:03:13,641 INFO L87 Difference]: Start difference. First operand 231 states and 510 transitions. Second operand has 31 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 states have internal predecessors, (70), 9 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-13 10:03:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:15,009 INFO L93 Difference]: Finished difference Result 301 states and 972 transitions. [2024-09-13 10:03:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 10:03:15,010 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 states have internal predecessors, (70), 9 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) Word has length 65 [2024-09-13 10:03:15,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:15,013 INFO L225 Difference]: With dead ends: 301 [2024-09-13 10:03:15,013 INFO L226 Difference]: Without dead ends: 265 [2024-09-13 10:03:15,014 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=2037, Unknown=0, NotChecked=0, Total=2550 [2024-09-13 10:03:15,015 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 93 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:15,015 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 203 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 10:03:15,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-09-13 10:03:15,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 237. [2024-09-13 10:03:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 160 states have (on average 1.20625) internal successors, (193), 178 states have internal predecessors, (193), 34 states have call successors, (34), 17 states have call predecessors, (34), 42 states have return successors, (307), 41 states have call predecessors, (307), 31 states have call successors, (307) [2024-09-13 10:03:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 534 transitions. [2024-09-13 10:03:15,177 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 534 transitions. Word has length 65 [2024-09-13 10:03:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:15,178 INFO L474 AbstractCegarLoop]: Abstraction has 237 states and 534 transitions. [2024-09-13 10:03:15,178 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 states have internal predecessors, (70), 9 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-13 10:03:15,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:15,178 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 534 transitions. [2024-09-13 10:03:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 10:03:15,179 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:15,179 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, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:03:15,193 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-13 10:03:15,380 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-13 10:03:15,380 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:15,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1261108705, now seen corresponding path program 1 times [2024-09-13 10:03:15,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:15,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517533095] [2024-09-13 10:03:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:15,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:03:15,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788144561] [2024-09-13 10:03:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:15,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:15,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:03:15,401 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:03:15,402 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-13 10:03:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:15,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-13 10:03:15,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:03:15,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-09-13 10:03:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:03:15,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:03:16,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:16,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517533095] [2024-09-13 10:03:16,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:03:16,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788144561] [2024-09-13 10:03:16,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788144561] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:03:16,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:03:16,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 10:03:16,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173856356] [2024-09-13 10:03:16,312 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:03:16,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 10:03:16,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:16,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 10:03:16,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-09-13 10:03:16,318 INFO L87 Difference]: Start difference. First operand 237 states and 534 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-13 10:03:17,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:17,085 INFO L93 Difference]: Finished difference Result 253 states and 601 transitions. [2024-09-13 10:03:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 10:03:17,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 54 [2024-09-13 10:03:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:17,090 INFO L225 Difference]: With dead ends: 253 [2024-09-13 10:03:17,090 INFO L226 Difference]: Without dead ends: 237 [2024-09-13 10:03:17,091 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 10:03:17,091 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:17,091 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 156 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 10:03:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-09-13 10:03:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 213. [2024-09-13 10:03:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 146 states have (on average 1.2191780821917808) internal successors, (178), 164 states have internal predecessors, (178), 31 states have call successors, (31), 15 states have call predecessors, (31), 35 states have return successors, (246), 33 states have call predecessors, (246), 29 states have call successors, (246) [2024-09-13 10:03:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 455 transitions. [2024-09-13 10:03:17,281 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 455 transitions. Word has length 54 [2024-09-13 10:03:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:17,281 INFO L474 AbstractCegarLoop]: Abstraction has 213 states and 455 transitions. [2024-09-13 10:03:17,281 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-13 10:03:17,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 455 transitions. [2024-09-13 10:03:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-13 10:03:17,284 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:17,284 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:03:17,302 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-13 10:03:17,484 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:17,485 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:17,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:17,485 INFO L85 PathProgramCache]: Analyzing trace with hash 25527485, now seen corresponding path program 1 times [2024-09-13 10:03:17,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:17,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080225164] [2024-09-13 10:03:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:17,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:17,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:03:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:17,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:03:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:17,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:03:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:18,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:18,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:03:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:18,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:18,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:03:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:18,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 10:03:18,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:18,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080225164] [2024-09-13 10:03:18,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080225164] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:03:18,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326859511] [2024-09-13 10:03:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:18,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:18,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:03:18,490 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:03:18,491 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-13 10:03:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:18,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-13 10:03:18,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:03:18,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:03:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 10:03:18,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:03:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 10:03:19,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326859511] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:03:19,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:03:19,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 25 [2024-09-13 10:03:19,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171823221] [2024-09-13 10:03:19,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:03:19,338 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 10:03:19,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:19,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 10:03:19,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:03:19,339 INFO L87 Difference]: Start difference. First operand 213 states and 455 transitions. Second operand has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 11 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-13 10:03:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:20,763 INFO L93 Difference]: Finished difference Result 269 states and 796 transitions. [2024-09-13 10:03:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 10:03:20,764 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 11 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) Word has length 67 [2024-09-13 10:03:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:20,766 INFO L225 Difference]: With dead ends: 269 [2024-09-13 10:03:20,767 INFO L226 Difference]: Without dead ends: 233 [2024-09-13 10:03:20,768 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=390, Invalid=1590, Unknown=0, NotChecked=0, Total=1980 [2024-09-13 10:03:20,768 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:20,768 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 162 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 10:03:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-09-13 10:03:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 201. [2024-09-13 10:03:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 138 states have (on average 1.2028985507246377) internal successors, (166), 154 states have internal predecessors, (166), 29 states have call successors, (29), 15 states have call predecessors, (29), 33 states have return successors, (202), 31 states have call predecessors, (202), 27 states have call successors, (202) [2024-09-13 10:03:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 397 transitions. [2024-09-13 10:03:20,946 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 397 transitions. Word has length 67 [2024-09-13 10:03:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:20,946 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 397 transitions. [2024-09-13 10:03:20,946 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 11 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-13 10:03:20,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 397 transitions. [2024-09-13 10:03:20,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-13 10:03:20,949 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:20,949 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:03:20,963 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-13 10:03:21,149 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-09-13 10:03:21,150 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:21,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:21,150 INFO L85 PathProgramCache]: Analyzing trace with hash 930286139, now seen corresponding path program 1 times [2024-09-13 10:03:21,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:21,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868070316] [2024-09-13 10:03:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:21,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:21,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:03:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:21,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:03:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:21,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:03:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:21,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:21,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:03:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:21,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:21,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:03:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:21,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 10:03:21,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:21,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868070316] [2024-09-13 10:03:21,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868070316] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:03:21,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205818319] [2024-09-13 10:03:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:21,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:21,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:03:21,890 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:03:21,894 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-13 10:03:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:22,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-13 10:03:22,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:03:22,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-09-13 10:03:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-13 10:03:22,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:03:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 10:03:23,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205818319] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:03:23,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:03:23,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 12] total 34 [2024-09-13 10:03:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987964220] [2024-09-13 10:03:23,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:03:23,092 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-13 10:03:23,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-13 10:03:23,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 10:03:23,093 INFO L87 Difference]: Start difference. First operand 201 states and 397 transitions. Second operand has 34 states, 30 states have (on average 2.6) internal successors, (78), 31 states have internal predecessors, (78), 11 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-13 10:03:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:25,088 INFO L93 Difference]: Finished difference Result 429 states and 1137 transitions. [2024-09-13 10:03:25,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 10:03:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 2.6) internal successors, (78), 31 states have internal predecessors, (78), 11 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) Word has length 67 [2024-09-13 10:03:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:25,093 INFO L225 Difference]: With dead ends: 429 [2024-09-13 10:03:25,093 INFO L226 Difference]: Without dead ends: 244 [2024-09-13 10:03:25,095 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=690, Invalid=3092, Unknown=0, NotChecked=0, Total=3782 [2024-09-13 10:03:25,096 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 137 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:25,096 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 211 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 10:03:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-09-13 10:03:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 191. [2024-09-13 10:03:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 133 states have (on average 1.1804511278195489) internal successors, (157), 145 states have internal predecessors, (157), 29 states have call successors, (29), 17 states have call predecessors, (29), 28 states have return successors, (125), 28 states have call predecessors, (125), 27 states have call successors, (125) [2024-09-13 10:03:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 311 transitions. [2024-09-13 10:03:25,256 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 311 transitions. Word has length 67 [2024-09-13 10:03:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:25,256 INFO L474 AbstractCegarLoop]: Abstraction has 191 states and 311 transitions. [2024-09-13 10:03:25,256 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 2.6) internal successors, (78), 31 states have internal predecessors, (78), 11 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-13 10:03:25,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 311 transitions. [2024-09-13 10:03:25,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-13 10:03:25,257 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:25,258 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:03:25,272 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-13 10:03:25,461 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-13 10:03:25,461 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:25,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2043242040, now seen corresponding path program 1 times [2024-09-13 10:03:25,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:25,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084929566] [2024-09-13 10:03:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:25,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:26,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:03:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:26,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:03:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:26,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:03:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:26,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:26,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:03:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:26,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:26,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:03:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:26,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:26,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 10:03:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:26,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 35 proven. 19 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-09-13 10:03:26,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:26,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084929566] [2024-09-13 10:03:26,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084929566] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:03:26,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448122110] [2024-09-13 10:03:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:26,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:26,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:03:26,851 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:03:26,852 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-13 10:03:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:27,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-13 10:03:27,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:03:27,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-13 10:03:27,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:03:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-13 10:03:27,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:03:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 10:03:28,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448122110] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:03:28,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:03:28,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 18] total 40 [2024-09-13 10:03:28,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082947332] [2024-09-13 10:03:28,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:03:28,578 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-13 10:03:28,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:28,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-13 10:03:28,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 10:03:28,579 INFO L87 Difference]: Start difference. First operand 191 states and 311 transitions. Second operand has 40 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 34 states have internal predecessors, (100), 17 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (21), 12 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-13 10:03:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:32,272 INFO L93 Difference]: Finished difference Result 648 states and 1405 transitions. [2024-09-13 10:03:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-09-13 10:03:32,273 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 34 states have internal predecessors, (100), 17 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (21), 12 states have call predecessors, (21), 16 states have call successors, (21) Word has length 84 [2024-09-13 10:03:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:32,277 INFO L225 Difference]: With dead ends: 648 [2024-09-13 10:03:32,277 INFO L226 Difference]: Without dead ends: 304 [2024-09-13 10:03:32,281 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2090 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1114, Invalid=7442, Unknown=0, NotChecked=0, Total=8556 [2024-09-13 10:03:32,282 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 225 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 2171 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:32,282 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 510 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2171 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-13 10:03:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-09-13 10:03:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 242. [2024-09-13 10:03:32,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 169 states have (on average 1.136094674556213) internal successors, (192), 182 states have internal predecessors, (192), 35 states have call successors, (35), 20 states have call predecessors, (35), 37 states have return successors, (182), 39 states have call predecessors, (182), 33 states have call successors, (182) [2024-09-13 10:03:32,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 409 transitions. [2024-09-13 10:03:32,462 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 409 transitions. Word has length 84 [2024-09-13 10:03:32,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:32,463 INFO L474 AbstractCegarLoop]: Abstraction has 242 states and 409 transitions. [2024-09-13 10:03:32,463 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 34 states have internal predecessors, (100), 17 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (21), 12 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-13 10:03:32,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:32,463 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 409 transitions. [2024-09-13 10:03:32,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-13 10:03:32,464 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:32,464 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:03:32,478 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-13 10:03:32,668 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-13 10:03:32,669 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:32,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:32,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1335027945, now seen corresponding path program 1 times [2024-09-13 10:03:32,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:32,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827980423] [2024-09-13 10:03:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:32,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:03:32,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522557395] [2024-09-13 10:03:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:32,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:32,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:03:32,693 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:03:32,714 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-13 10:03:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:32,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-09-13 10:03:32,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:03:32,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:03:32,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:03:32,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:03:32,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:03:32,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:03:33,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:03:34,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-09-13 10:03:34,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-13 10:03:34,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-13 10:03:34,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-13 10:03:34,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 20 [2024-09-13 10:03:34,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:03:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 10:03:34,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:03:37,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:37,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827980423] [2024-09-13 10:03:37,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:03:37,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522557395] [2024-09-13 10:03:37,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522557395] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:03:37,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:03:37,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 10:03:37,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755337788] [2024-09-13 10:03:37,481 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:03:37,481 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 10:03:37,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:37,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 10:03:37,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2024-09-13 10:03:37,482 INFO L87 Difference]: Start difference. First operand 242 states and 409 transitions. Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 10:03:39,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 10:03:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:40,784 INFO L93 Difference]: Finished difference Result 264 states and 467 transitions. [2024-09-13 10:03:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 10:03:40,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 63 [2024-09-13 10:03:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:40,790 INFO L225 Difference]: With dead ends: 264 [2024-09-13 10:03:40,790 INFO L226 Difference]: Without dead ends: 258 [2024-09-13 10:03:40,790 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-09-13 10:03:40,791 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:40,791 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 159 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-13 10:03:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-09-13 10:03:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 248. [2024-09-13 10:03:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 172 states have (on average 1.1337209302325582) internal successors, (195), 185 states have internal predecessors, (195), 35 states have call successors, (35), 20 states have call predecessors, (35), 40 states have return successors, (215), 42 states have call predecessors, (215), 33 states have call successors, (215) [2024-09-13 10:03:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 445 transitions. [2024-09-13 10:03:40,992 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 445 transitions. Word has length 63 [2024-09-13 10:03:40,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:40,992 INFO L474 AbstractCegarLoop]: Abstraction has 248 states and 445 transitions. [2024-09-13 10:03:40,993 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 10:03:40,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 445 transitions. [2024-09-13 10:03:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-13 10:03:40,994 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:40,994 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:03:41,008 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-13 10:03:41,197 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-13 10:03:41,197 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:41,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:41,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1758674667, now seen corresponding path program 1 times [2024-09-13 10:03:41,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:41,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735544260] [2024-09-13 10:03:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:41,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:41,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:03:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:41,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:03:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:41,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:03:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:41,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:41,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 10:03:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:41,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:41,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:03:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:41,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:03:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-13 10:03:41,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:41,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735544260] [2024-09-13 10:03:41,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735544260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:03:41,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168986205] [2024-09-13 10:03:41,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:41,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:41,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:03:41,263 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:03:41,264 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-13 10:03:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:41,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-09-13 10:03:41,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:03:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 10:03:41,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:03:41,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168986205] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:03:41,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:03:41,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-09-13 10:03:41,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493831830] [2024-09-13 10:03:41,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:03:41,476 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 10:03:41,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:41,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 10:03:41,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:03:41,477 INFO L87 Difference]: Start difference. First operand 248 states and 445 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 10:03:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:41,663 INFO L93 Difference]: Finished difference Result 403 states and 781 transitions. [2024-09-13 10:03:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 10:03:41,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2024-09-13 10:03:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:41,666 INFO L225 Difference]: With dead ends: 403 [2024-09-13 10:03:41,666 INFO L226 Difference]: Without dead ends: 246 [2024-09-13 10:03:41,667 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:03:41,667 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:41,667 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:03:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-09-13 10:03:41,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2024-09-13 10:03:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 167 states have (on average 1.1197604790419162) internal successors, (187), 178 states have internal predecessors, (187), 33 states have call successors, (33), 20 states have call predecessors, (33), 35 states have return successors, (156), 37 states have call predecessors, (156), 31 states have call successors, (156) [2024-09-13 10:03:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 376 transitions. [2024-09-13 10:03:41,867 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 376 transitions. Word has length 63 [2024-09-13 10:03:41,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:41,868 INFO L474 AbstractCegarLoop]: Abstraction has 236 states and 376 transitions. [2024-09-13 10:03:41,868 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 10:03:41,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:41,868 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 376 transitions. [2024-09-13 10:03:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-13 10:03:41,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:41,869 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:03:41,885 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-13 10:03:42,069 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:42,070 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:42,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:42,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1482227333, now seen corresponding path program 1 times [2024-09-13 10:03:42,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:42,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201648813] [2024-09-13 10:03:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:42,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:03:42,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140260235] [2024-09-13 10:03:42,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:42,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:42,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:03:42,091 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:03:42,095 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-13 10:03:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:42,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 179 conjuncts are in the unsatisfiable core [2024-09-13 10:03:42,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:03:42,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:03:42,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:03:42,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:03:42,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:03:42,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:03:42,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:03:42,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:03:43,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-13 10:03:43,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-09-13 10:03:43,531 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 27 treesize of output 19 [2024-09-13 10:03:43,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-13 10:03:43,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-13 10:03:43,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-13 10:03:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 10:03:43,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:03:45,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:03:45,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201648813] [2024-09-13 10:03:45,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:03:45,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140260235] [2024-09-13 10:03:45,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140260235] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:03:45,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:03:45,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 10:03:45,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833810407] [2024-09-13 10:03:45,997 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:03:45,997 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 10:03:45,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:03:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 10:03:45,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:03:45,998 INFO L87 Difference]: Start difference. First operand 236 states and 376 transitions. Second operand has 20 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 10:03:47,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:03:47,243 INFO L93 Difference]: Finished difference Result 252 states and 404 transitions. [2024-09-13 10:03:47,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 10:03:47,244 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 61 [2024-09-13 10:03:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:03:47,246 INFO L225 Difference]: With dead ends: 252 [2024-09-13 10:03:47,247 INFO L226 Difference]: Without dead ends: 246 [2024-09-13 10:03:47,247 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2024-09-13 10:03:47,247 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 10:03:47,247 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 167 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 10:03:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-09-13 10:03:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2024-09-13 10:03:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 167 states have (on average 1.1197604790419162) internal successors, (187), 178 states have internal predecessors, (187), 33 states have call successors, (33), 20 states have call predecessors, (33), 35 states have return successors, (156), 37 states have call predecessors, (156), 31 states have call successors, (156) [2024-09-13 10:03:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 376 transitions. [2024-09-13 10:03:47,454 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 376 transitions. Word has length 61 [2024-09-13 10:03:47,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:03:47,454 INFO L474 AbstractCegarLoop]: Abstraction has 236 states and 376 transitions. [2024-09-13 10:03:47,454 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 10:03:47,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:47,454 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 376 transitions. [2024-09-13 10:03:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-13 10:03:47,455 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:03:47,455 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:03:47,469 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-13 10:03:47,656 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:47,656 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:03:47,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:03:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1205831140, now seen corresponding path program 1 times [2024-09-13 10:03:47,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:03:47,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363907317] [2024-09-13 10:03:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:47,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:03:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:03:47,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979718416] [2024-09-13 10:03:47,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:03:47,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:03:47,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:03:47,706 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:03:47,712 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-13 10:03:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:03:48,026 WARN L260 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 325 conjuncts are in the unsatisfiable core [2024-09-13 10:03:48,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:03:48,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:03:48,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:03:48,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:03:48,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:03:48,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 10:03:48,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:03:48,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:03:48,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 10:03:59,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 45 [2024-09-13 10:03:59,880 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 33 treesize of output 25 [2024-09-13 10:03:59,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-09-13 10:04:00,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 50 [2024-09-13 10:04:00,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-13 10:04:00,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-13 10:04:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 26 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-13 10:04:00,574 INFO L327 TraceCheckSpWp]: Computing backward predicates...