./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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 11:38:40,841 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:38:40,902 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 11:38:40,907 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:38:40,908 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:38:40,931 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:38:40,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:38:40,932 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:38:40,933 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:38:40,933 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:38:40,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:38:40,934 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:38:40,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:38:40,935 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:38:40,935 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:38:40,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:38:40,936 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:38:40,937 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:38:40,937 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 11:38:40,937 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:38:40,937 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:38:40,939 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:38:40,939 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:38:40,939 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:38:40,939 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:38:40,939 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:38:40,940 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:38:40,940 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:38:40,940 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:38:40,940 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:38:40,940 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:38:40,940 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:38:40,940 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:38:40,941 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:38:40,941 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:38:40,941 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:38:40,941 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 11:38:40,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 11:38:40,941 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:38:40,941 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:38:40,942 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:38:40,943 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:38:40,943 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 11:38:41,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:38:41,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:38:41,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:38:41,223 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:38:41,224 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:38:41,224 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c [2024-09-25 11:38:42,426 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:38:42,589 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:38:42,593 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c [2024-09-25 11:38:42,601 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a94cea1c3/26db0317b8644a0293ec38981e3c1658/FLAG51a9ca4c1 [2024-09-25 11:38:42,994 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a94cea1c3/26db0317b8644a0293ec38981e3c1658 [2024-09-25 11:38:42,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:38:42,997 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:38:42,998 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:38:42,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:38:43,001 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:38:43,002 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:38:42" (1/1) ... [2024-09-25 11:38:43,002 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e3eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43, skipping insertion in model container [2024-09-25 11:38:43,003 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:38:42" (1/1) ... [2024-09-25 11:38:43,019 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:38:43,144 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c[1060,1073] [2024-09-25 11:38:43,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:38:43,171 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:38:43,182 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c[1060,1073] [2024-09-25 11:38:43,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:38:43,206 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:38:43,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43 WrapperNode [2024-09-25 11:38:43,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:38:43,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:38:43,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:38:43,207 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:38:43,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (1/1) ... [2024-09-25 11:38:43,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (1/1) ... [2024-09-25 11:38:43,226 INFO L138 Inliner]: procedures = 16, calls = 86, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:38:43,226 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:38:43,227 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:38:43,227 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:38:43,227 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:38:43,238 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (1/1) ... [2024-09-25 11:38:43,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (1/1) ... [2024-09-25 11:38:43,241 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (1/1) ... [2024-09-25 11:38:43,259 INFO L175 MemorySlicer]: Split 57 memory accesses to 7 slices as follows [2, 15, 15, 9, 7, 5, 4]. 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, 4, 4, 4, 2, 1, 1]. [2024-09-25 11:38:43,259 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (1/1) ... [2024-09-25 11:38:43,259 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (1/1) ... [2024-09-25 11:38:43,271 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (1/1) ... [2024-09-25 11:38:43,275 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (1/1) ... [2024-09-25 11:38:43,277 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (1/1) ... [2024-09-25 11:38:43,281 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (1/1) ... [2024-09-25 11:38:43,283 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:38:43,284 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:38:43,284 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:38:43,284 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:38:43,285 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (1/1) ... [2024-09-25 11:38:43,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:38:43,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:43,311 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 11:38:43,314 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 11:38:43,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:38:43,349 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 11:38:43,350 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 11:38:43,350 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:38:43,350 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:38:43,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 11:38:43,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 11:38:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 11:38:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 11:38:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 11:38:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-25 11:38:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-25 11:38:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 11:38:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 11:38:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 11:38:43,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 11:38:43,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 11:38:43,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 11:38:43,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-25 11:38:43,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-25 11:38:43,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:38:43,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:38:43,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:38:43,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:38:43,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 11:38:43,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 11:38:43,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 11:38:43,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 11:38:43,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 11:38:43,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-25 11:38:43,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-25 11:38:43,356 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_51_0 [2024-09-25 11:38:43,357 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_51_0 [2024-09-25 11:38:43,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 11:38:43,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 11:38:43,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 11:38:43,458 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:38:43,460 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:38:43,696 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-09-25 11:38:43,697 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:38:43,715 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:38:43,715 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-25 11:38:43,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:38:43 BoogieIcfgContainer [2024-09-25 11:38:43,715 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:38:43,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:38:43,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:38:43,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:38:43,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:38:42" (1/3) ... [2024-09-25 11:38:43,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d0ddf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:38:43, skipping insertion in model container [2024-09-25 11:38:43,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:43" (2/3) ... [2024-09-25 11:38:43,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d0ddf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:38:43, skipping insertion in model container [2024-09-25 11:38:43,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:38:43" (3/3) ... [2024-09-25 11:38:43,724 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_prod4br-ll.c [2024-09-25 11:38:43,735 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:38:43,735 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 11:38:43,786 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:38:43,792 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;@df6c458, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:38:43,792 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 11:38:43,795 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) [2024-09-25 11:38:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-25 11:38:43,800 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:43,801 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:38:43,801 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:43,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:43,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1334266921, now seen corresponding path program 1 times [2024-09-25 11:38:43,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:43,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778774426] [2024-09-25 11:38:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:43,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:43,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:38:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:43,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:38:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:38:44,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:44,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778774426] [2024-09-25 11:38:44,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778774426] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:38:44,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:38:44,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 11:38:44,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552177048] [2024-09-25 11:38:44,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:38:44,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 11:38:44,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:44,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 11:38:44,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 11:38:44,035 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) [2024-09-25 11:38:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:44,061 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2024-09-25 11:38:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 11:38:44,063 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 [2024-09-25 11:38:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:44,067 INFO L225 Difference]: With dead ends: 74 [2024-09-25 11:38:44,068 INFO L226 Difference]: Without dead ends: 37 [2024-09-25 11:38:44,070 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 [2024-09-25 11:38:44,075 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 [2024-09-25 11:38:44,076 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] [2024-09-25 11:38:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-25 11:38:44,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-25 11:38:44,109 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) [2024-09-25 11:38:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2024-09-25 11:38:44,112 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 18 [2024-09-25 11:38:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:44,113 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2024-09-25 11:38:44,113 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) [2024-09-25 11:38:44,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2024-09-25 11:38:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-25 11:38:44,115 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:44,115 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:38:44,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 11:38:44,115 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:44,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash -633202343, now seen corresponding path program 1 times [2024-09-25 11:38:44,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:44,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762167913] [2024-09-25 11:38:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:44,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:44,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848125404] [2024-09-25 11:38:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:44,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:44,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:44,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:44,188 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 11:38:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:44,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-25 11:38:44,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:44,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:44,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:44,416 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 [2024-09-25 11:38:44,423 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 [2024-09-25 11:38:44,428 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 11 [2024-09-25 11:38:44,434 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 [2024-09-25 11:38:44,569 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 19 treesize of output 11 [2024-09-25 11:38:44,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-25 11:38:44,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:38:44,614 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 15 treesize of output 7 [2024-09-25 11:38:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:38:44,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:38:44,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:44,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762167913] [2024-09-25 11:38:44,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:38:44,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848125404] [2024-09-25 11:38:44,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848125404] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:38:44,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:38:44,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 11:38:44,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016722697] [2024-09-25 11:38:44,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:38:44,662 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 11:38:44,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:44,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 11:38:44,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 11:38:44,667 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) [2024-09-25 11:38:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:44,917 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-09-25 11:38:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 11:38:44,917 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 [2024-09-25 11:38:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:44,918 INFO L225 Difference]: With dead ends: 58 [2024-09-25 11:38:44,918 INFO L226 Difference]: Without dead ends: 56 [2024-09-25 11:38:44,919 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 [2024-09-25 11:38:44,920 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:44,921 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 173 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 11:38:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-25 11:38:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2024-09-25 11:38:44,932 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) [2024-09-25 11:38:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2024-09-25 11:38:44,935 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 18 [2024-09-25 11:38:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:44,935 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2024-09-25 11:38:44,936 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) [2024-09-25 11:38:44,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2024-09-25 11:38:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-25 11:38:44,938 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:44,938 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] [2024-09-25 11:38:44,952 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 11:38:45,142 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 [2024-09-25 11:38:45,143 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:45,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:45,144 INFO L85 PathProgramCache]: Analyzing trace with hash 261423925, now seen corresponding path program 1 times [2024-09-25 11:38:45,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:45,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840537484] [2024-09-25 11:38:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:45,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:45,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61698723] [2024-09-25 11:38:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:45,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:45,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:45,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:45,196 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 11:38:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:45,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-25 11:38:45,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:45,293 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 15 treesize of output 1 [2024-09-25 11:38:45,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:38:45,306 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 15 treesize of output 11 [2024-09-25 11:38:45,324 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 11 treesize of output 7 [2024-09-25 11:38:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:38:45,482 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:38:45,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:45,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840537484] [2024-09-25 11:38:45,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:38:45,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61698723] [2024-09-25 11:38:45,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61698723] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:38:45,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:38:45,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-25 11:38:45,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829419371] [2024-09-25 11:38:45,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:38:45,483 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 11:38:45,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:45,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 11:38:45,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-25 11:38:45,486 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) [2024-09-25 11:38:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:45,750 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2024-09-25 11:38:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 11:38:45,751 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 [2024-09-25 11:38:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:45,752 INFO L225 Difference]: With dead ends: 90 [2024-09-25 11:38:45,753 INFO L226 Difference]: Without dead ends: 65 [2024-09-25 11:38:45,753 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 [2024-09-25 11:38:45,754 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 [2024-09-25 11:38:45,754 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] [2024-09-25 11:38:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-25 11:38:45,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2024-09-25 11:38:45,772 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) [2024-09-25 11:38:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2024-09-25 11:38:45,773 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 29 [2024-09-25 11:38:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:45,773 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2024-09-25 11:38:45,773 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) [2024-09-25 11:38:45,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2024-09-25 11:38:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-25 11:38:45,775 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:45,775 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] [2024-09-25 11:38:45,789 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 11:38:45,975 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 [2024-09-25 11:38:45,976 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:45,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:45,976 INFO L85 PathProgramCache]: Analyzing trace with hash -418634445, now seen corresponding path program 1 times [2024-09-25 11:38:45,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:45,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757578093] [2024-09-25 11:38:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:45,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:46,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:38:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:46,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:38:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:46,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:38:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:46,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:38:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:38:46,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:46,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757578093] [2024-09-25 11:38:46,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757578093] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:38:46,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:38:46,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-25 11:38:46,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997926056] [2024-09-25 11:38:46,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:38:46,423 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 11:38:46,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 11:38:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-25 11:38:46,424 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) [2024-09-25 11:38:46,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:46,766 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2024-09-25 11:38:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 11:38:46,766 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 [2024-09-25 11:38:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:46,767 INFO L225 Difference]: With dead ends: 81 [2024-09-25 11:38:46,767 INFO L226 Difference]: Without dead ends: 69 [2024-09-25 11:38:46,768 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-25 11:38:46,768 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:46,768 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 108 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 11:38:46,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-25 11:38:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2024-09-25 11:38:46,779 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) [2024-09-25 11:38:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-25 11:38:46,780 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 29 [2024-09-25 11:38:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:46,781 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-25 11:38:46,781 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) [2024-09-25 11:38:46,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-25 11:38:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-25 11:38:46,782 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:46,782 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] [2024-09-25 11:38:46,782 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-25 11:38:46,782 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:46,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:46,782 INFO L85 PathProgramCache]: Analyzing trace with hash 661556601, now seen corresponding path program 1 times [2024-09-25 11:38:46,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:46,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425253713] [2024-09-25 11:38:46,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:46,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:46,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019193165] [2024-09-25 11:38:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:46,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:46,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:46,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:46,818 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 11:38:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:46,930 WARN L260 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-09-25 11:38:46,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:46,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:46,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:46,963 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 [2024-09-25 11:38:46,969 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 [2024-09-25 11:38:46,975 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 [2024-09-25 11:38:46,981 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 [2024-09-25 11:38:47,312 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 [2024-09-25 11:38:47,317 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 [2024-09-25 11:38:47,326 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 [2024-09-25 11:38:47,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:38:47,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 11:38:47,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:38:47,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 11:38:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:38:47,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:38:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:38:48,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:48,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425253713] [2024-09-25 11:38:48,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:38:48,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019193165] [2024-09-25 11:38:48,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019193165] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:38:48,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:38:48,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-09-25 11:38:48,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442009123] [2024-09-25 11:38:48,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:38:48,832 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:38:48,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:48,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:38:48,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-09-25 11:38:48,833 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) [2024-09-25 11:38:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:57,969 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2024-09-25 11:38:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 11:38:57,969 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 [2024-09-25 11:38:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:57,971 INFO L225 Difference]: With dead ends: 113 [2024-09-25 11:38:57,971 INFO L226 Difference]: Without dead ends: 109 [2024-09-25 11:38:57,971 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 11:38:57,972 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 214 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:57,972 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 243 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-25 11:38:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-25 11:38:58,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2024-09-25 11:38:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 62 states have internal predecessors, (72), 14 states have call successors, (14), 11 states have call predecessors, (14), 13 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-25 11:38:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2024-09-25 11:38:58,011 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 31 [2024-09-25 11:38:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:58,011 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2024-09-25 11:38:58,011 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) [2024-09-25 11:38:58,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2024-09-25 11:38:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-25 11:38:58,012 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:58,013 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] [2024-09-25 11:38:58,026 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 11:38:58,216 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:58,216 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:58,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:58,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1560377938, now seen corresponding path program 1 times [2024-09-25 11:38:58,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:58,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416155570] [2024-09-25 11:38:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:58,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030894726] [2024-09-25 11:38:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:58,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:58,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:58,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:58,243 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 11:38:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:58,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-25 11:38:58,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:58,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:58,324 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 15 treesize of output 11 [2024-09-25 11:38:58,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:38:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:38:58,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:38:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:38:58,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416155570] [2024-09-25 11:38:58,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:38:58,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030894726] [2024-09-25 11:38:58,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030894726] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 11:38:58,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:38:58,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 14 [2024-09-25 11:38:58,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094731790] [2024-09-25 11:38:58,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:38:58,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 11:38:58,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 11:38:58,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-09-25 11:38:58,540 INFO L87 Difference]: Start difference. First operand 86 states and 107 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) [2024-09-25 11:38:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:58,668 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2024-09-25 11:38:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 11:38:58,668 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 [2024-09-25 11:38:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:58,672 INFO L225 Difference]: With dead ends: 91 [2024-09-25 11:38:58,672 INFO L226 Difference]: Without dead ends: 76 [2024-09-25 11:38:58,672 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 [2024-09-25 11:38:58,673 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:58,673 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 190 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:38:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-25 11:38:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2024-09-25 11:38:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 states have internal predecessors, (62), 12 states have call successors, (12), 9 states have call predecessors, (12), 11 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2024-09-25 11:38:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2024-09-25 11:38:58,694 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 35 [2024-09-25 11:38:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:58,694 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2024-09-25 11:38:58,694 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) [2024-09-25 11:38:58,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2024-09-25 11:38:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-25 11:38:58,698 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:58,698 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] [2024-09-25 11:38:58,712 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 11:38:58,898 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:58,899 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:58,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:58,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1573056070, now seen corresponding path program 1 times [2024-09-25 11:38:58,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:58,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396538762] [2024-09-25 11:38:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:58,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:59,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:38:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:59,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:38:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:59,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:38:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:59,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:38:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:59,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-25 11:38:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:59,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:38:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 11:38:59,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:59,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396538762] [2024-09-25 11:38:59,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396538762] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:38:59,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51254188] [2024-09-25 11:38:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:59,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:59,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:59,846 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:38:59,847 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 11:38:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:59,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 11:38:59,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:00,009 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 [2024-09-25 11:39:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:39:00,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:39:00,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51254188] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:39:00,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:39:00,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2024-09-25 11:39:00,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843839412] [2024-09-25 11:39:00,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:00,221 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 11:39:00,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:00,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 11:39:00,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-09-25 11:39:00,222 INFO L87 Difference]: Start difference. First operand 73 states and 93 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) [2024-09-25 11:39:00,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:00,722 INFO L93 Difference]: Finished difference Result 114 states and 216 transitions. [2024-09-25 11:39:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 11:39:00,723 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 [2024-09-25 11:39:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:00,724 INFO L225 Difference]: With dead ends: 114 [2024-09-25 11:39:00,724 INFO L226 Difference]: Without dead ends: 97 [2024-09-25 11:39:00,725 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2024-09-25 11:39:00,727 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 135 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:00,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 100 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 11:39:00,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-25 11:39:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2024-09-25 11:39:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.320754716981132) internal successors, (70), 59 states have internal predecessors, (70), 14 states have call successors, (14), 9 states have call predecessors, (14), 11 states have return successors, (25), 10 states have call predecessors, (25), 12 states have call successors, (25) [2024-09-25 11:39:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2024-09-25 11:39:00,778 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 44 [2024-09-25 11:39:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:00,779 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2024-09-25 11:39:00,779 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) [2024-09-25 11:39:00,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2024-09-25 11:39:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-25 11:39:00,784 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:00,784 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] [2024-09-25 11:39:00,798 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-25 11:39:00,984 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-25 11:39:00,985 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:00,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2020846648, now seen corresponding path program 1 times [2024-09-25 11:39:00,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:00,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957734803] [2024-09-25 11:39:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:00,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:01,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:39:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:01,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:39:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:01,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:39:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:01,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:01,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-25 11:39:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:01,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-25 11:39:01,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957734803] [2024-09-25 11:39:01,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957734803] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669603651] [2024-09-25 11:39:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:01,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:01,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:01,593 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:01,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 11:39:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:01,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-25 11:39:01,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:01,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-25 11:39:01,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-25 11:39:01,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:39:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669603651] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:39:02,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:39:02,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 9] total 26 [2024-09-25 11:39:02,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632388876] [2024-09-25 11:39:02,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:02,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-25 11:39:02,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:02,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-25 11:39:02,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2024-09-25 11:39:02,132 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand has 26 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 9 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-25 11:39:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:02,826 INFO L93 Difference]: Finished difference Result 105 states and 177 transitions. [2024-09-25 11:39:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-25 11:39:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 9 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) Word has length 44 [2024-09-25 11:39:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:02,828 INFO L225 Difference]: With dead ends: 105 [2024-09-25 11:39:02,828 INFO L226 Difference]: Without dead ends: 87 [2024-09-25 11:39:02,829 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 11:39:02,829 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 112 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:02,829 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 179 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 11:39:02,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-25 11:39:02,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2024-09-25 11:39:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.32) internal successors, (66), 55 states have internal predecessors, (66), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (16), 8 states have call predecessors, (16), 12 states have call successors, (16) [2024-09-25 11:39:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2024-09-25 11:39:02,865 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 44 [2024-09-25 11:39:02,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:02,865 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2024-09-25 11:39:02,865 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 9 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-25 11:39:02,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:02,866 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2024-09-25 11:39:02,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 11:39:02,867 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:02,867 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] [2024-09-25 11:39:02,880 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 11:39:03,067 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:03,068 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:03,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:03,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1016093312, now seen corresponding path program 1 times [2024-09-25 11:39:03,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:03,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929451315] [2024-09-25 11:39:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:03,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:03,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667824810] [2024-09-25 11:39:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:03,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:03,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:03,090 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:03,091 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 11:39:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:03,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-25 11:39:03,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:03,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:03,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:39:03,214 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 [2024-09-25 11:39:03,220 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 [2024-09-25 11:39:03,224 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 [2024-09-25 11:39:03,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:03,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:03,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-25 11:39:03,621 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 [2024-09-25 11:39:03,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:03,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-25 11:39:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:39:03,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:04,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:04,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929451315] [2024-09-25 11:39:04,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:04,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667824810] [2024-09-25 11:39:04,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667824810] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:04,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:04,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-25 11:39:04,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976687080] [2024-09-25 11:39:04,187 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:04,187 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 11:39:04,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:04,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 11:39:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-09-25 11:39:04,188 INFO L87 Difference]: Start difference. First operand 73 states and 96 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) [2024-09-25 11:39:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:04,734 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2024-09-25 11:39:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 11:39:04,735 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 [2024-09-25 11:39:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:04,736 INFO L225 Difference]: With dead ends: 85 [2024-09-25 11:39:04,736 INFO L226 Difference]: Without dead ends: 83 [2024-09-25 11:39:04,736 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-09-25 11:39:04,736 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:04,736 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 140 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 11:39:04,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-25 11:39:04,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2024-09-25 11:39:04,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.290909090909091) internal successors, (71), 60 states have internal predecessors, (71), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2024-09-25 11:39:04,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 109 transitions. [2024-09-25 11:39:04,759 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 109 transitions. Word has length 46 [2024-09-25 11:39:04,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:04,759 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 109 transitions. [2024-09-25 11:39:04,760 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) [2024-09-25 11:39:04,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 109 transitions. [2024-09-25 11:39:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 11:39:04,761 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:04,761 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] [2024-09-25 11:39:04,774 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 11:39:04,961 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:04,962 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:04,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash 264265128, now seen corresponding path program 1 times [2024-09-25 11:39:04,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:04,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091030016] [2024-09-25 11:39:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:04,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:04,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107271799] [2024-09-25 11:39:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:04,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:04,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:04,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:04,990 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 11:39:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:05,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-25 11:39:05,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:05,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:05,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:39:05,117 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 [2024-09-25 11:39:05,121 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 [2024-09-25 11:39:05,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:05,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:05,145 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 11 treesize of output 7 [2024-09-25 11:39:05,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:05,626 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 [2024-09-25 11:39:05,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 11:39:05,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:39:05,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:06,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:06,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091030016] [2024-09-25 11:39:06,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:06,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107271799] [2024-09-25 11:39:06,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107271799] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:06,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:06,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-25 11:39:06,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531962033] [2024-09-25 11:39:06,314 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:06,315 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 11:39:06,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:06,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 11:39:06,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-09-25 11:39:06,315 INFO L87 Difference]: Start difference. First operand 81 states and 109 transitions. Second operand has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2024-09-25 11:39:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:07,243 INFO L93 Difference]: Finished difference Result 95 states and 138 transitions. [2024-09-25 11:39:07,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 11:39:07,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 [2024-09-25 11:39:07,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:07,245 INFO L225 Difference]: With dead ends: 95 [2024-09-25 11:39:07,245 INFO L226 Difference]: Without dead ends: 93 [2024-09-25 11:39:07,245 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-09-25 11:39:07,245 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:07,246 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 133 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 11:39:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-25 11:39:07,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2024-09-25 11:39:07,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.290909090909091) internal successors, (71), 60 states have internal predecessors, (71), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2024-09-25 11:39:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 109 transitions. [2024-09-25 11:39:07,269 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 109 transitions. Word has length 48 [2024-09-25 11:39:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:07,269 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 109 transitions. [2024-09-25 11:39:07,269 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2024-09-25 11:39:07,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:07,270 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 109 transitions. [2024-09-25 11:39:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 11:39:07,270 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:07,270 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] [2024-09-25 11:39:07,283 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 11:39:07,472 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:07,473 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:07,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash -921540890, now seen corresponding path program 1 times [2024-09-25 11:39:07,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:07,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330818948] [2024-09-25 11:39:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:07,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:07,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:39:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:07,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:39:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:07,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:39:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:07,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:07,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:39:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:07,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 11:39:07,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:07,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330818948] [2024-09-25 11:39:07,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330818948] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:39:07,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:39:07,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-25 11:39:07,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646553227] [2024-09-25 11:39:07,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:39:07,542 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-25 11:39:07,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-25 11:39:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-25 11:39:07,543 INFO L87 Difference]: Start difference. First operand 81 states and 109 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 11:39:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:07,631 INFO L93 Difference]: Finished difference Result 127 states and 184 transitions. [2024-09-25 11:39:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-25 11:39:07,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2024-09-25 11:39:07,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:07,633 INFO L225 Difference]: With dead ends: 127 [2024-09-25 11:39:07,633 INFO L226 Difference]: Without dead ends: 83 [2024-09-25 11:39:07,633 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-25 11:39:07,634 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:07,634 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 43 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:39:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-25 11:39:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-09-25 11:39:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.280701754385965) internal successors, (73), 62 states have internal predecessors, (73), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2024-09-25 11:39:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2024-09-25 11:39:07,660 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 48 [2024-09-25 11:39:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:07,660 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2024-09-25 11:39:07,660 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 11:39:07,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2024-09-25 11:39:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 11:39:07,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:07,662 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] [2024-09-25 11:39:07,662 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-25 11:39:07,662 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:07,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:07,662 INFO L85 PathProgramCache]: Analyzing trace with hash -498839064, now seen corresponding path program 1 times [2024-09-25 11:39:07,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:07,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240042408] [2024-09-25 11:39:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:07,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:07,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:39:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:07,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:39:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:07,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:39:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:08,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:08,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:39:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:08,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 11:39:08,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:08,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240042408] [2024-09-25 11:39:08,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240042408] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:39:08,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:39:08,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-25 11:39:08,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094250489] [2024-09-25 11:39:08,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:39:08,033 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 11:39:08,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:08,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 11:39:08,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:39:08,034 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 11:39:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:08,206 INFO L93 Difference]: Finished difference Result 139 states and 212 transitions. [2024-09-25 11:39:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 11:39:08,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2024-09-25 11:39:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:08,208 INFO L225 Difference]: With dead ends: 139 [2024-09-25 11:39:08,208 INFO L226 Difference]: Without dead ends: 87 [2024-09-25 11:39:08,208 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-09-25 11:39:08,209 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:08,209 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 65 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:39:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-25 11:39:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2024-09-25 11:39:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 63 states have internal predecessors, (72), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2024-09-25 11:39:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2024-09-25 11:39:08,240 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 48 [2024-09-25 11:39:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:08,240 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2024-09-25 11:39:08,241 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 11:39:08,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2024-09-25 11:39:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 11:39:08,242 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:08,242 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] [2024-09-25 11:39:08,242 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-25 11:39:08,242 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:08,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:08,243 INFO L85 PathProgramCache]: Analyzing trace with hash -632852570, now seen corresponding path program 1 times [2024-09-25 11:39:08,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:08,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903257844] [2024-09-25 11:39:08,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:08,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:08,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:39:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:08,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:39:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:08,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:39:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:08,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:08,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:39:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:08,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 11:39:08,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:08,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903257844] [2024-09-25 11:39:08,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903257844] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:39:08,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:39:08,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-25 11:39:08,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883155262] [2024-09-25 11:39:08,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:39:08,630 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 11:39:08,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:08,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 11:39:08,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:39:08,631 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 11:39:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:08,787 INFO L93 Difference]: Finished difference Result 133 states and 194 transitions. [2024-09-25 11:39:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 11:39:08,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2024-09-25 11:39:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:08,789 INFO L225 Difference]: With dead ends: 133 [2024-09-25 11:39:08,789 INFO L226 Difference]: Without dead ends: 86 [2024-09-25 11:39:08,790 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-25 11:39:08,790 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:08,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 66 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:39:08,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-25 11:39:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2024-09-25 11:39:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 62 states have internal predecessors, (70), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2024-09-25 11:39:08,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2024-09-25 11:39:08,830 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 48 [2024-09-25 11:39:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:08,830 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2024-09-25 11:39:08,830 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 11:39:08,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:08,831 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2024-09-25 11:39:08,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 11:39:08,831 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:08,831 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] [2024-09-25 11:39:08,832 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-25 11:39:08,832 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:08,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:08,832 INFO L85 PathProgramCache]: Analyzing trace with hash -436799450, now seen corresponding path program 1 times [2024-09-25 11:39:08,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:08,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583129799] [2024-09-25 11:39:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:08,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:08,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133103855] [2024-09-25 11:39:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:08,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:08,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:08,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:08,856 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 11:39:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:08,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-25 11:39:08,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:08,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:08,989 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 [2024-09-25 11:39:08,993 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 [2024-09-25 11:39:08,997 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 [2024-09-25 11:39:09,001 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 [2024-09-25 11:39:09,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:09,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:09,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:09,564 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 [2024-09-25 11:39:09,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:09,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-25 11:39:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:39:09,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:10,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:10,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583129799] [2024-09-25 11:39:10,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:10,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133103855] [2024-09-25 11:39:10,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133103855] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:10,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:10,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-25 11:39:10,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852124661] [2024-09-25 11:39:10,191 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:10,191 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 11:39:10,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:10,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 11:39:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-09-25 11:39:10,192 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2024-09-25 11:39:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:10,970 INFO L93 Difference]: Finished difference Result 97 states and 137 transitions. [2024-09-25 11:39:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 11:39:10,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 [2024-09-25 11:39:10,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:10,971 INFO L225 Difference]: With dead ends: 97 [2024-09-25 11:39:10,972 INFO L226 Difference]: Without dead ends: 95 [2024-09-25 11:39:10,972 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2024-09-25 11:39:10,972 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:10,973 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 164 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 11:39:10,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-25 11:39:11,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2024-09-25 11:39:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 63 states have internal predecessors, (70), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (26), 10 states have call predecessors, (26), 14 states have call successors, (26) [2024-09-25 11:39:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2024-09-25 11:39:11,004 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 48 [2024-09-25 11:39:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:11,004 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2024-09-25 11:39:11,004 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2024-09-25 11:39:11,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2024-09-25 11:39:11,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 11:39:11,006 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:11,006 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] [2024-09-25 11:39:11,019 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 11:39:11,206 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 [2024-09-25 11:39:11,207 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:11,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:11,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1274409114, now seen corresponding path program 1 times [2024-09-25 11:39:11,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:11,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905031712] [2024-09-25 11:39:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:11,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:11,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125832738] [2024-09-25 11:39:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:11,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:11,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:11,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:11,231 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 11:39:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:11,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-25 11:39:11,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:11,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:11,371 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 [2024-09-25 11:39:11,373 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 [2024-09-25 11:39:11,376 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 [2024-09-25 11:39:11,381 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 [2024-09-25 11:39:11,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:11,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:11,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:11,835 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 [2024-09-25 11:39:11,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:11,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:39:11,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:12,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:12,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905031712] [2024-09-25 11:39:12,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:12,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125832738] [2024-09-25 11:39:12,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125832738] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:12,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:12,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-25 11:39:12,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095159126] [2024-09-25 11:39:12,453 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:12,453 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 11:39:12,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 11:39:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-09-25 11:39:12,454 INFO L87 Difference]: Start difference. First operand 84 states and 112 transitions. Second operand has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2024-09-25 11:39:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:13,021 INFO L93 Difference]: Finished difference Result 95 states and 129 transitions. [2024-09-25 11:39:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 11:39:13,022 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 [2024-09-25 11:39:13,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:13,023 INFO L225 Difference]: With dead ends: 95 [2024-09-25 11:39:13,023 INFO L226 Difference]: Without dead ends: 93 [2024-09-25 11:39:13,023 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2024-09-25 11:39:13,024 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:13,024 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 163 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 11:39:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-25 11:39:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2024-09-25 11:39:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 62 states have internal predecessors, (70), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2024-09-25 11:39:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2024-09-25 11:39:13,058 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 48 [2024-09-25 11:39:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:13,058 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2024-09-25 11:39:13,058 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2024-09-25 11:39:13,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2024-09-25 11:39:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-25 11:39:13,059 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:13,059 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] [2024-09-25 11:39:13,073 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-25 11:39:13,263 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 [2024-09-25 11:39:13,264 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:13,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1482227333, now seen corresponding path program 1 times [2024-09-25 11:39:13,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:13,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718043028] [2024-09-25 11:39:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:13,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:13,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294444565] [2024-09-25 11:39:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:13,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:13,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:13,302 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:13,303 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 11:39:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:13,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-09-25 11:39:13,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:13,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:13,457 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 [2024-09-25 11:39:13,459 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 [2024-09-25 11:39:13,462 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 [2024-09-25 11:39:13,466 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 [2024-09-25 11:39:13,483 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 11 treesize of output 7 [2024-09-25 11:39:13,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:14,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-25 11:39:15,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-09-25 11:39:15,009 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 [2024-09-25 11:39:15,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:15,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-25 11:39:15,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 11:39:15,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:18,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:18,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718043028] [2024-09-25 11:39:18,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:18,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294444565] [2024-09-25 11:39:18,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294444565] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:18,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:18,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-25 11:39:18,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966864837] [2024-09-25 11:39:18,292 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:18,292 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 11:39:18,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 11:39:18,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2024-09-25 11:39:18,293 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 11:39:19,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:19,638 INFO L93 Difference]: Finished difference Result 100 states and 141 transitions. [2024-09-25 11:39:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 11:39:19,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (9), 3 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 [2024-09-25 11:39:19,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:19,640 INFO L225 Difference]: With dead ends: 100 [2024-09-25 11:39:19,640 INFO L226 Difference]: Without dead ends: 98 [2024-09-25 11:39:19,641 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 11:39:19,641 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:19,641 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 155 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-25 11:39:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-25 11:39:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2024-09-25 11:39:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2024-09-25 11:39:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 119 transitions. [2024-09-25 11:39:19,673 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 119 transitions. Word has length 61 [2024-09-25 11:39:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:19,673 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 119 transitions. [2024-09-25 11:39:19,674 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 11:39:19,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 119 transitions. [2024-09-25 11:39:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-25 11:39:19,674 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:19,674 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] [2024-09-25 11:39:19,687 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-25 11:39:19,875 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-25 11:39:19,875 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:19,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1521485639, now seen corresponding path program 1 times [2024-09-25 11:39:19,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:19,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777526338] [2024-09-25 11:39:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:19,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:19,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551736146] [2024-09-25 11:39:19,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:19,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:19,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:19,893 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:19,894 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 11:39:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:20,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 11:39:20,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:20,050 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 [2024-09-25 11:39:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:39:20,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:20,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:20,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777526338] [2024-09-25 11:39:20,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:20,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551736146] [2024-09-25 11:39:20,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551736146] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:20,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:20,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-25 11:39:20,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297410273] [2024-09-25 11:39:20,382 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:20,382 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-25 11:39:20,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-25 11:39:20,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-25 11:39:20,383 INFO L87 Difference]: Start difference. First operand 86 states and 119 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 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) [2024-09-25 11:39:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:20,711 INFO L93 Difference]: Finished difference Result 117 states and 181 transitions. [2024-09-25 11:39:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 11:39:20,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 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 52 [2024-09-25 11:39:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:20,712 INFO L225 Difference]: With dead ends: 117 [2024-09-25 11:39:20,712 INFO L226 Difference]: Without dead ends: 101 [2024-09-25 11:39:20,713 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2024-09-25 11:39:20,713 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 13 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:20,713 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 137 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 390 Invalid, 5 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 11:39:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-25 11:39:20,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2024-09-25 11:39:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 68 states have internal predecessors, (76), 17 states have call successors, (17), 11 states have call predecessors, (17), 13 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) [2024-09-25 11:39:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 136 transitions. [2024-09-25 11:39:20,750 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 136 transitions. Word has length 52 [2024-09-25 11:39:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:20,750 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 136 transitions. [2024-09-25 11:39:20,750 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 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) [2024-09-25 11:39:20,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 136 transitions. [2024-09-25 11:39:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-25 11:39:20,751 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:20,751 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] [2024-09-25 11:39:20,763 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-25 11:39:20,951 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-25 11:39:20,951 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:20,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:20,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1590925951, now seen corresponding path program 2 times [2024-09-25 11:39:20,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:20,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978113911] [2024-09-25 11:39:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:20,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:21,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:39:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:21,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:39:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:21,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:39:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:21,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:21,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:39:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:21,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:21,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:39:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:21,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 11:39:21,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:21,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978113911] [2024-09-25 11:39:21,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978113911] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:21,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765893781] [2024-09-25 11:39:21,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:39:21,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:21,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:21,684 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:21,685 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 11:39:21,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:39:21,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:39:21,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-25 11:39:21,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:21,906 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 [2024-09-25 11:39:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 11:39:22,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:39:22,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765893781] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:39:22,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:39:22,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 26 [2024-09-25 11:39:22,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272974420] [2024-09-25 11:39:22,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:22,405 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-25 11:39:22,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:22,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-25 11:39:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2024-09-25 11:39:22,405 INFO L87 Difference]: Start difference. First operand 94 states and 136 transitions. Second operand has 26 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 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) [2024-09-25 11:39:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:23,532 INFO L93 Difference]: Finished difference Result 158 states and 417 transitions. [2024-09-25 11:39:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 11:39:23,532 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 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 [2024-09-25 11:39:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:23,534 INFO L225 Difference]: With dead ends: 158 [2024-09-25 11:39:23,534 INFO L226 Difference]: Without dead ends: 138 [2024-09-25 11:39:23,535 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=2133, Unknown=0, NotChecked=0, Total=2652 [2024-09-25 11:39:23,535 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 176 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:23,536 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 185 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 11:39:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-09-25 11:39:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2024-09-25 11:39:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 82 states have internal predecessors, (89), 19 states have call successors, (19), 11 states have call predecessors, (19), 23 states have return successors, (126), 24 states have call predecessors, (126), 16 states have call successors, (126) [2024-09-25 11:39:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 234 transitions. [2024-09-25 11:39:23,579 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 234 transitions. Word has length 63 [2024-09-25 11:39:23,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:23,580 INFO L474 AbstractCegarLoop]: Abstraction has 118 states and 234 transitions. [2024-09-25 11:39:23,580 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 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) [2024-09-25 11:39:23,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:23,580 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 234 transitions. [2024-09-25 11:39:23,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-25 11:39:23,581 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:23,581 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] [2024-09-25 11:39:23,598 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-25 11:39:23,782 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-25 11:39:23,782 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:23,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:23,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1435701663, now seen corresponding path program 1 times [2024-09-25 11:39:23,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:23,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073617538] [2024-09-25 11:39:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:23,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:24,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:39:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:24,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:39:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:24,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:39:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:24,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:24,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:39:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:24,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:24,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 11:39:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 11:39:24,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:24,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073617538] [2024-09-25 11:39:24,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073617538] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:39:24,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:39:24,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-25 11:39:24,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769700401] [2024-09-25 11:39:24,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:39:24,147 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 11:39:24,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:24,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 11:39:24,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:39:24,148 INFO L87 Difference]: Start difference. First operand 118 states and 234 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) [2024-09-25 11:39:24,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:24,291 INFO L93 Difference]: Finished difference Result 195 states and 418 transitions. [2024-09-25 11:39:24,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 11:39:24,291 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 [2024-09-25 11:39:24,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:24,292 INFO L225 Difference]: With dead ends: 195 [2024-09-25 11:39:24,292 INFO L226 Difference]: Without dead ends: 108 [2024-09-25 11:39:24,293 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 [2024-09-25 11:39:24,294 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:24,294 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:39:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-25 11:39:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2024-09-25 11:39:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.173913043478261) internal successors, (81), 75 states have internal predecessors, (81), 18 states have call successors, (18), 11 states have call predecessors, (18), 18 states have return successors, (78), 19 states have call predecessors, (78), 15 states have call successors, (78) [2024-09-25 11:39:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 177 transitions. [2024-09-25 11:39:24,327 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 177 transitions. Word has length 54 [2024-09-25 11:39:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:24,327 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 177 transitions. [2024-09-25 11:39:24,327 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) [2024-09-25 11:39:24,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 177 transitions. [2024-09-25 11:39:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-25 11:39:24,328 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:24,329 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] [2024-09-25 11:39:24,329 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-09-25 11:39:24,329 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:24,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:24,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1183574303, now seen corresponding path program 1 times [2024-09-25 11:39:24,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:24,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067226705] [2024-09-25 11:39:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:24,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:24,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152741350] [2024-09-25 11:39:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:24,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:24,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:24,354 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:24,356 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 11:39:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:24,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 11:39:24,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:24,557 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 [2024-09-25 11:39:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:39:24,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:24,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:24,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067226705] [2024-09-25 11:39:24,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:24,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152741350] [2024-09-25 11:39:24,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152741350] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:24,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:24,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-25 11:39:24,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81753180] [2024-09-25 11:39:24,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:24,879 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-25 11:39:24,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-25 11:39:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-25 11:39:24,879 INFO L87 Difference]: Start difference. First operand 106 states and 177 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) [2024-09-25 11:39:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:25,127 INFO L93 Difference]: Finished difference Result 114 states and 183 transitions. [2024-09-25 11:39:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 11:39:25,127 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 [2024-09-25 11:39:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:25,128 INFO L225 Difference]: With dead ends: 114 [2024-09-25 11:39:25,128 INFO L226 Difference]: Without dead ends: 98 [2024-09-25 11:39:25,129 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 [2024-09-25 11:39:25,129 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:25,129 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 146 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 11:39:25,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-25 11:39:25,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2024-09-25 11:39:25,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 64 states have internal predecessors, (69), 15 states have call successors, (15), 9 states have call predecessors, (15), 14 states have return successors, (58), 14 states have call predecessors, (58), 13 states have call successors, (58) [2024-09-25 11:39:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 142 transitions. [2024-09-25 11:39:25,160 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 142 transitions. Word has length 54 [2024-09-25 11:39:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:25,161 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 142 transitions. [2024-09-25 11:39:25,161 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) [2024-09-25 11:39:25,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:25,161 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 142 transitions. [2024-09-25 11:39:25,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-25 11:39:25,162 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:25,162 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] [2024-09-25 11:39:25,177 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-25 11:39:25,366 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:25,367 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:25,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:25,367 INFO L85 PathProgramCache]: Analyzing trace with hash -363139833, now seen corresponding path program 1 times [2024-09-25 11:39:25,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:25,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592454993] [2024-09-25 11:39:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:25,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:25,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:39:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:25,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:39:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:25,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:39:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:25,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:25,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-25 11:39:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:25,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:25,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:39:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:25,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-25 11:39:25,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:25,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592454993] [2024-09-25 11:39:25,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592454993] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:25,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770998916] [2024-09-25 11:39:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:25,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:25,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:25,438 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:25,439 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 11:39:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:25,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-09-25 11:39:25,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 11:39:25,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:39:25,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770998916] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:39:25,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:25,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-09-25 11:39:25,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034688024] [2024-09-25 11:39:25,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:39:25,590 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-25 11:39:25,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:25,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-25 11:39:25,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-25 11:39:25,591 INFO L87 Difference]: Start difference. First operand 88 states and 142 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-09-25 11:39:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:25,632 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2024-09-25 11:39:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-25 11:39:25,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 61 [2024-09-25 11:39:25,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:25,634 INFO L225 Difference]: With dead ends: 144 [2024-09-25 11:39:25,634 INFO L226 Difference]: Without dead ends: 87 [2024-09-25 11:39:25,635 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-25 11:39:25,635 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 [2024-09-25 11:39:25,635 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] [2024-09-25 11:39:25,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-25 11:39:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-09-25 11:39:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 63 states have internal predecessors, (68), 14 states have call successors, (14), 9 states have call predecessors, (14), 14 states have return successors, (50), 14 states have call predecessors, (50), 12 states have call successors, (50) [2024-09-25 11:39:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 132 transitions. [2024-09-25 11:39:25,667 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 132 transitions. Word has length 61 [2024-09-25 11:39:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:25,668 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 132 transitions. [2024-09-25 11:39:25,668 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-09-25 11:39:25,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 132 transitions. [2024-09-25 11:39:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-25 11:39:25,669 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:25,669 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] [2024-09-25 11:39:25,685 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-25 11:39:25,869 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-25 11:39:25,869 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:25,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:25,870 INFO L85 PathProgramCache]: Analyzing trace with hash -511014421, now seen corresponding path program 1 times [2024-09-25 11:39:25,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:25,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259909941] [2024-09-25 11:39:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:25,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:25,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093905912] [2024-09-25 11:39:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:25,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:25,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:25,898 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:25,903 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 11:39:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:26,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-09-25 11:39:26,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:26,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:26,096 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 [2024-09-25 11:39:26,099 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 [2024-09-25 11:39:26,102 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 [2024-09-25 11:39:26,105 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 [2024-09-25 11:39:26,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:26,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:27,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:27,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-25 11:39:27,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:27,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:27,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-25 11:39:27,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-25 11:39:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-25 11:39:27,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:29,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259909941] [2024-09-25 11:39:29,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093905912] [2024-09-25 11:39:29,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093905912] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:29,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:29,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-25 11:39:29,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057085014] [2024-09-25 11:39:29,417 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:29,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 11:39:29,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:29,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 11:39:29,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2024-09-25 11:39:29,418 INFO L87 Difference]: Start difference. First operand 87 states and 132 transitions. Second operand has 20 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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) [2024-09-25 11:39:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:30,397 INFO L93 Difference]: Finished difference Result 95 states and 145 transitions. [2024-09-25 11:39:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 11:39:30,399 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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 [2024-09-25 11:39:30,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:30,400 INFO L225 Difference]: With dead ends: 95 [2024-09-25 11:39:30,400 INFO L226 Difference]: Without dead ends: 89 [2024-09-25 11:39:30,401 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-09-25 11:39:30,401 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:30,401 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 150 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 11:39:30,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-25 11:39:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2024-09-25 11:39:30,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 63 states have internal predecessors, (68), 14 states have call successors, (14), 9 states have call predecessors, (14), 14 states have return successors, (49), 14 states have call predecessors, (49), 12 states have call successors, (49) [2024-09-25 11:39:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 131 transitions. [2024-09-25 11:39:30,432 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 131 transitions. Word has length 63 [2024-09-25 11:39:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:30,432 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 131 transitions. [2024-09-25 11:39:30,432 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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) [2024-09-25 11:39:30,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 131 transitions. [2024-09-25 11:39:30,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-25 11:39:30,433 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:30,433 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] [2024-09-25 11:39:30,447 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-25 11:39:30,634 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:30,634 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:30,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:30,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1978514541, now seen corresponding path program 1 times [2024-09-25 11:39:30,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:30,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562617772] [2024-09-25 11:39:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:30,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:30,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:39:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:30,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:39:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:30,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:39:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:31,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:31,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-25 11:39:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:31,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:31,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:39:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:31,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:39:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 11:39:31,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:31,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562617772] [2024-09-25 11:39:31,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562617772] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:39:31,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:39:31,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 11:39:31,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727389740] [2024-09-25 11:39:31,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:39:31,155 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 11:39:31,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:31,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 11:39:31,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-25 11:39:31,156 INFO L87 Difference]: Start difference. First operand 87 states and 131 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-25 11:39:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:31,351 INFO L93 Difference]: Finished difference Result 102 states and 180 transitions. [2024-09-25 11:39:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 11:39:31,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2024-09-25 11:39:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:31,352 INFO L225 Difference]: With dead ends: 102 [2024-09-25 11:39:31,352 INFO L226 Difference]: Without dead ends: 92 [2024-09-25 11:39:31,353 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-09-25 11:39:31,353 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:31,353 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 78 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:39:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-25 11:39:31,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2024-09-25 11:39:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 64 states have internal predecessors, (68), 15 states have call successors, (15), 9 states have call predecessors, (15), 14 states have return successors, (57), 14 states have call predecessors, (57), 13 states have call successors, (57) [2024-09-25 11:39:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 140 transitions. [2024-09-25 11:39:31,384 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 140 transitions. Word has length 63 [2024-09-25 11:39:31,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:31,384 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 140 transitions. [2024-09-25 11:39:31,384 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-25 11:39:31,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 140 transitions. [2024-09-25 11:39:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-25 11:39:31,386 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:31,386 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, 1, 1] [2024-09-25 11:39:31,386 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-09-25 11:39:31,386 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:31,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:31,386 INFO L85 PathProgramCache]: Analyzing trace with hash 686182317, now seen corresponding path program 1 times [2024-09-25 11:39:31,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:31,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150318917] [2024-09-25 11:39:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:31,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:31,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579978188] [2024-09-25 11:39:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:31,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:31,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:31,417 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:31,418 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 11:39:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:31,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-09-25 11:39:31,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:31,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:31,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:31,641 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 [2024-09-25 11:39:31,644 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 [2024-09-25 11:39:31,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:31,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:32,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-09-25 11:39:32,271 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 22 [2024-09-25 11:39:32,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 11:39:32,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:39:32,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-09-25 11:39:32,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-09-25 11:39:32,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 11:39:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:39:32,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:35,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-09-25 11:39:35,078 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:39:35,079 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 86 treesize of output 85 [2024-09-25 11:39:35,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:35,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150318917] [2024-09-25 11:39:35,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:35,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579978188] [2024-09-25 11:39:35,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579978188] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:35,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:35,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-25 11:39:35,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461127941] [2024-09-25 11:39:35,907 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:35,908 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 11:39:35,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 11:39:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2024-09-25 11:39:35,908 INFO L87 Difference]: Start difference. First operand 88 states and 140 transitions. Second operand has 23 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 11:39:37,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:37,348 INFO L93 Difference]: Finished difference Result 100 states and 170 transitions. [2024-09-25 11:39:37,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 11:39:37,348 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 63 [2024-09-25 11:39:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:37,350 INFO L225 Difference]: With dead ends: 100 [2024-09-25 11:39:37,351 INFO L226 Difference]: Without dead ends: 94 [2024-09-25 11:39:37,351 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 11:39:37,351 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:37,352 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 160 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 11:39:37,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-25 11:39:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2024-09-25 11:39:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 63 states have internal predecessors, (67), 15 states have call successors, (15), 9 states have call predecessors, (15), 13 states have return successors, (53), 13 states have call predecessors, (53), 13 states have call successors, (53) [2024-09-25 11:39:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 135 transitions. [2024-09-25 11:39:37,387 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 135 transitions. Word has length 63 [2024-09-25 11:39:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:37,387 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 135 transitions. [2024-09-25 11:39:37,387 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 11:39:37,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 135 transitions. [2024-09-25 11:39:37,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-25 11:39:37,388 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:37,388 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] [2024-09-25 11:39:37,396 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-25 11:39:37,588 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 [2024-09-25 11:39:37,589 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:37,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1272988331, now seen corresponding path program 1 times [2024-09-25 11:39:37,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:37,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688777008] [2024-09-25 11:39:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:37,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:37,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922120443] [2024-09-25 11:39:37,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:37,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:37,627 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:37,628 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-25 11:39:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:37,831 WARN L260 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 246 conjuncts are in the unsatisfiable core [2024-09-25 11:39:37,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:37,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:37,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:37,844 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 [2024-09-25 11:39:37,847 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 [2024-09-25 11:39:37,851 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 [2024-09-25 11:39:37,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:38,208 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 15 [2024-09-25 11:39:39,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2024-09-25 11:39:40,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 11:39:40,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-25 11:39:40,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2024-09-25 11:39:40,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 11:39:40,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2024-09-25 11:39:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-25 11:39:40,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:39:55,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:39:55,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688777008] [2024-09-25 11:39:55,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:39:55,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922120443] [2024-09-25 11:39:55,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922120443] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:39:55,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:39:55,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-25 11:39:55,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240875012] [2024-09-25 11:39:55,250 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:39:55,251 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 11:39:55,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:39:55,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 11:39:55,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 11:39:55,251 INFO L87 Difference]: Start difference. First operand 86 states and 135 transitions. Second operand has 28 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 8 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 11:39:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:39:58,789 INFO L93 Difference]: Finished difference Result 96 states and 153 transitions. [2024-09-25 11:39:58,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-25 11:39:58,790 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 8 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 63 [2024-09-25 11:39:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:39:58,791 INFO L225 Difference]: With dead ends: 96 [2024-09-25 11:39:58,791 INFO L226 Difference]: Without dead ends: 90 [2024-09-25 11:39:58,792 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=283, Invalid=2167, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 11:39:58,792 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-25 11:39:58,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 149 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-25 11:39:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-25 11:39:58,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2024-09-25 11:39:58,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 63 states have internal predecessors, (67), 15 states have call successors, (15), 9 states have call predecessors, (15), 13 states have return successors, (52), 13 states have call predecessors, (52), 13 states have call successors, (52) [2024-09-25 11:39:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 134 transitions. [2024-09-25 11:39:58,834 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 134 transitions. Word has length 63 [2024-09-25 11:39:58,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:39:58,834 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 134 transitions. [2024-09-25 11:39:58,834 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 8 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 11:39:58,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:58,834 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 134 transitions. [2024-09-25 11:39:58,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-25 11:39:58,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:39:58,835 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] [2024-09-25 11:39:58,849 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-25 11:39:59,035 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 [2024-09-25 11:39:59,035 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:39:59,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:39:59,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1335027945, now seen corresponding path program 1 times [2024-09-25 11:39:59,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:39:59,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860025277] [2024-09-25 11:39:59,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:59,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:39:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:39:59,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845754989] [2024-09-25 11:39:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:39:59,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:39:59,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:39:59,070 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:39:59,074 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-25 11:39:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:39:59,301 WARN L260 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 252 conjuncts are in the unsatisfiable core [2024-09-25 11:39:59,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:39:59,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:59,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:39:59,314 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 [2024-09-25 11:39:59,317 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 [2024-09-25 11:39:59,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:39:59,324 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 [2024-09-25 11:39:59,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:39:59,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:40:03,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 43 [2024-09-25 11:40:03,770 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 [2024-09-25 11:40:03,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:40:03,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 48 [2024-09-25 11:40:03,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 11:40:03,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-25 11:40:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:40:04,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:40:24,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:40:24,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860025277] [2024-09-25 11:40:24,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:40:24,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845754989] [2024-09-25 11:40:24,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845754989] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:40:24,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:40:24,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-25 11:40:24,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755007996] [2024-09-25 11:40:24,568 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:40:24,569 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 11:40:24,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:40:24,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 11:40:24,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 11:40:24,570 INFO L87 Difference]: Start difference. First operand 86 states and 134 transitions. Second operand has 28 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 25 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 11:40:29,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:40:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:40:32,201 INFO L93 Difference]: Finished difference Result 102 states and 169 transitions. [2024-09-25 11:40:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-25 11:40:32,202 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 25 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 63 [2024-09-25 11:40:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:40:32,203 INFO L225 Difference]: With dead ends: 102 [2024-09-25 11:40:32,203 INFO L226 Difference]: Without dead ends: 90 [2024-09-25 11:40:32,204 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=315, Invalid=2547, Unknown=0, NotChecked=0, Total=2862 [2024-09-25 11:40:32,204 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:40:32,204 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 149 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-09-25 11:40:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-25 11:40:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2024-09-25 11:40:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 64 states have internal predecessors, (68), 15 states have call successors, (15), 9 states have call predecessors, (15), 14 states have return successors, (57), 14 states have call predecessors, (57), 13 states have call successors, (57) [2024-09-25 11:40:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 140 transitions. [2024-09-25 11:40:32,249 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 140 transitions. Word has length 63 [2024-09-25 11:40:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:40:32,250 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 140 transitions. [2024-09-25 11:40:32,250 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 25 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 11:40:32,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 140 transitions. [2024-09-25 11:40:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-25 11:40:32,251 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:40:32,251 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] [2024-09-25 11:40:32,266 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-25 11:40:32,455 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-25 11:40:32,455 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:40:32,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2060506709, now seen corresponding path program 1 times [2024-09-25 11:40:32,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:40:32,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601752580] [2024-09-25 11:40:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:32,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:40:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:33,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:40:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:33,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:40:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:33,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:40:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:33,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:40:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:33,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:40:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:33,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:40:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:33,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:40:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:33,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:40:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-25 11:40:33,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:40:33,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601752580] [2024-09-25 11:40:33,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601752580] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:40:33,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902624182] [2024-09-25 11:40:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:33,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:40:33,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:40:33,528 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:40:33,529 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-25 11:40:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:33,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 11:40:33,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:40:33,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:40:33,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:40:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-25 11:40:33,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:40:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-25 11:40:34,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902624182] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:40:34,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:40:34,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2024-09-25 11:40:34,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615861987] [2024-09-25 11:40:34,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:40:34,409 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-25 11:40:34,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:40:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-25 11:40:34,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2024-09-25 11:40:34,410 INFO L87 Difference]: Start difference. First operand 88 states and 140 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) [2024-09-25 11:40:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:40:35,988 INFO L93 Difference]: Finished difference Result 224 states and 602 transitions. [2024-09-25 11:40:35,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-25 11:40:35,989 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 [2024-09-25 11:40:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:40:35,991 INFO L225 Difference]: With dead ends: 224 [2024-09-25 11:40:35,991 INFO L226 Difference]: Without dead ends: 159 [2024-09-25 11:40:35,992 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=352, Invalid=2618, Unknown=0, NotChecked=0, Total=2970 [2024-09-25 11:40:35,993 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 130 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-25 11:40:35,993 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 335 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-25 11:40:35,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-25 11:40:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 131. [2024-09-25 11:40:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2) internal successors, (102), 97 states have internal predecessors, (102), 22 states have call successors, (22), 10 states have call predecessors, (22), 23 states have return successors, (164), 23 states have call predecessors, (164), 20 states have call successors, (164) [2024-09-25 11:40:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 288 transitions. [2024-09-25 11:40:36,072 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 288 transitions. Word has length 65 [2024-09-25 11:40:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:40:36,072 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 288 transitions. [2024-09-25 11:40:36,072 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) [2024-09-25 11:40:36,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 288 transitions. [2024-09-25 11:40:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-25 11:40:36,073 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:40:36,074 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] [2024-09-25 11:40:36,087 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-25 11:40:36,274 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-25 11:40:36,274 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:40:36,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:36,274 INFO L85 PathProgramCache]: Analyzing trace with hash -682253735, now seen corresponding path program 1 times [2024-09-25 11:40:36,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:40:36,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164846148] [2024-09-25 11:40:36,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:36,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:40:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:36,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:40:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:36,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:40:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:36,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:40:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:36,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:40:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:36,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:40:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:36,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:40:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:36,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:40:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:37,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:40:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 11:40:37,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:40:37,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164846148] [2024-09-25 11:40:37,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164846148] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:40:37,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900271341] [2024-09-25 11:40:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:37,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:40:37,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:40:37,021 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:40:37,022 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-25 11:40:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:37,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-25 11:40:37,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:40:37,300 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 48 treesize of output 21 [2024-09-25 11:40:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 11:40:37,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:40:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:40:38,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900271341] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:40:38,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:40:38,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 41 [2024-09-25 11:40:38,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497672336] [2024-09-25 11:40:38,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:40:38,184 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-25 11:40:38,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:40:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-25 11:40:38,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 11:40:38,185 INFO L87 Difference]: Start difference. First operand 131 states and 288 transitions. Second operand has 41 states, 35 states have (on average 2.257142857142857) internal successors, (79), 37 states have internal predecessors, (79), 11 states have call successors, (16), 6 states have call predecessors, (16), 8 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-25 11:40:40,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:40:40,283 INFO L93 Difference]: Finished difference Result 368 states and 1301 transitions. [2024-09-25 11:40:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-25 11:40:40,284 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 35 states have (on average 2.257142857142857) internal successors, (79), 37 states have internal predecessors, (79), 11 states have call successors, (16), 6 states have call predecessors, (16), 8 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) Word has length 65 [2024-09-25 11:40:40,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:40:40,288 INFO L225 Difference]: With dead ends: 368 [2024-09-25 11:40:40,288 INFO L226 Difference]: Without dead ends: 268 [2024-09-25 11:40:40,290 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1417, Invalid=5723, Unknown=0, NotChecked=0, Total=7140 [2024-09-25 11:40:40,291 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 159 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:40:40,291 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 227 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-25 11:40:40,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-09-25 11:40:40,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 184. [2024-09-25 11:40:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 118 states have (on average 1.194915254237288) internal successors, (141), 133 states have internal predecessors, (141), 28 states have call successors, (28), 12 states have call predecessors, (28), 37 states have return successors, (277), 38 states have call predecessors, (277), 26 states have call successors, (277) [2024-09-25 11:40:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 446 transitions. [2024-09-25 11:40:40,421 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 446 transitions. Word has length 65 [2024-09-25 11:40:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:40:40,421 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 446 transitions. [2024-09-25 11:40:40,421 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 35 states have (on average 2.257142857142857) internal successors, (79), 37 states have internal predecessors, (79), 11 states have call successors, (16), 6 states have call predecessors, (16), 8 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-25 11:40:40,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 446 transitions. [2024-09-25 11:40:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-25 11:40:40,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:40:40,422 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] [2024-09-25 11:40:40,436 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-25 11:40:40,623 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-25 11:40:40,623 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:40:40,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:40,623 INFO L85 PathProgramCache]: Analyzing trace with hash 758902854, now seen corresponding path program 1 times [2024-09-25 11:40:40,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:40:40,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949378847] [2024-09-25 11:40:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:40,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:40:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:41,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:40:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:41,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:40:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:41,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:40:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:41,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:40:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:41,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:40:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:41,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:40:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:41,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:40:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:41,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:40:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:41,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:40:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:41,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:40:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-09-25 11:40:41,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:40:41,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949378847] [2024-09-25 11:40:41,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949378847] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:40:41,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959914984] [2024-09-25 11:40:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:41,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:40:41,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:40:41,910 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:40:41,911 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-25 11:40:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:42,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-25 11:40:42,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:40:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-25 11:40:42,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:40:42,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959914984] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:40:42,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:40:42,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2024-09-25 11:40:42,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060617132] [2024-09-25 11:40:42,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:40:42,173 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 11:40:42,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:40:42,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 11:40:42,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-09-25 11:40:42,174 INFO L87 Difference]: Start difference. First operand 184 states and 446 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2024-09-25 11:40:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:40:42,321 INFO L93 Difference]: Finished difference Result 314 states and 826 transitions. [2024-09-25 11:40:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 11:40:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 84 [2024-09-25 11:40:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:40:42,323 INFO L225 Difference]: With dead ends: 314 [2024-09-25 11:40:42,323 INFO L226 Difference]: Without dead ends: 157 [2024-09-25 11:40:42,325 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-09-25 11:40:42,325 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:40:42,326 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 134 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:40:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-25 11:40:42,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2024-09-25 11:40:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 111 states have internal predecessors, (119), 22 states have call successors, (22), 12 states have call predecessors, (22), 28 states have return successors, (139), 29 states have call predecessors, (139), 20 states have call successors, (139) [2024-09-25 11:40:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 280 transitions. [2024-09-25 11:40:42,413 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 280 transitions. Word has length 84 [2024-09-25 11:40:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:40:42,413 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 280 transitions. [2024-09-25 11:40:42,413 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2024-09-25 11:40:42,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 280 transitions. [2024-09-25 11:40:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-25 11:40:42,414 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:40:42,414 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 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] [2024-09-25 11:40:42,428 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-25 11:40:42,614 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-25 11:40:42,615 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:40:42,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:40:42,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1813149505, now seen corresponding path program 1 times [2024-09-25 11:40:42,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:40:42,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509190677] [2024-09-25 11:40:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:42,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:40:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:40:42,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078346163] [2024-09-25 11:40:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:40:42,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:40:42,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:40:42,641 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:40:42,642 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-25 11:40:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:40:42,922 WARN L260 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 243 conjuncts are in the unsatisfiable core [2024-09-25 11:40:42,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:40:42,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:40:42,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:40:42,933 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 [2024-09-25 11:40:42,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:40:42,940 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 [2024-09-25 11:40:42,944 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 [2024-09-25 11:40:42,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:40:42,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:40:46,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2024-09-25 11:40:46,176 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-25 11:40:46,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2024-09-25 11:40:46,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 11:40:46,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:40:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-25 11:40:46,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:03,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:03,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509190677] [2024-09-25 11:41:03,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:41:03,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078346163] [2024-09-25 11:41:03,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078346163] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:03,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:41:03,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-25 11:41:03,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248856129] [2024-09-25 11:41:03,737 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:03,738 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 11:41:03,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:03,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 11:41:03,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=936, Unknown=1, NotChecked=0, Total=1056 [2024-09-25 11:41:03,738 INFO L87 Difference]: Start difference. First operand 153 states and 280 transitions. Second operand has 27 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 24 states have internal predecessors, (43), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 11:41:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:08,295 INFO L93 Difference]: Finished difference Result 179 states and 360 transitions. [2024-09-25 11:41:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 11:41:08,296 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 24 states have internal predecessors, (43), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 67 [2024-09-25 11:41:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:08,298 INFO L225 Difference]: With dead ends: 179 [2024-09-25 11:41:08,298 INFO L226 Difference]: Without dead ends: 157 [2024-09-25 11:41:08,299 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=288, Invalid=2161, Unknown=1, NotChecked=0, Total=2450 [2024-09-25 11:41:08,299 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:08,299 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 230 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-25 11:41:08,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-25 11:41:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2024-09-25 11:41:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 112 states have internal predecessors, (120), 22 states have call successors, (22), 12 states have call predecessors, (22), 29 states have return successors, (144), 30 states have call predecessors, (144), 20 states have call successors, (144) [2024-09-25 11:41:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 286 transitions. [2024-09-25 11:41:08,390 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 286 transitions. Word has length 67 [2024-09-25 11:41:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:08,390 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 286 transitions. [2024-09-25 11:41:08,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 24 states have internal predecessors, (43), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 11:41:08,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 286 transitions. [2024-09-25 11:41:08,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-25 11:41:08,391 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:08,391 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2024-09-25 11:41:08,405 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-25 11:41:08,591 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:08,592 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:08,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash -315216678, now seen corresponding path program 1 times [2024-09-25 11:41:08,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:08,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628534894] [2024-09-25 11:41:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:08,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:09,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:41:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:09,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:41:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:09,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:41:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:09,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:09,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-25 11:41:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:10,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:10,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:41:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:10,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:10,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 11:41:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:10,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-25 11:41:10,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:10,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628534894] [2024-09-25 11:41:10,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628534894] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:10,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772070681] [2024-09-25 11:41:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:10,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:10,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:10,227 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:41:10,240 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-25 11:41:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:10,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-25 11:41:10,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:10,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:41:10,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:41:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-25 11:41:10,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 43 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-25 11:41:11,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772070681] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:41:11,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:41:11,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 40 [2024-09-25 11:41:11,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683550381] [2024-09-25 11:41:11,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:11,879 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-25 11:41:11,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:11,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-25 11:41:11,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 11:41:11,880 INFO L87 Difference]: Start difference. First operand 155 states and 286 transitions. Second operand has 40 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 34 states have internal predecessors, (86), 17 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (20), 12 states have call predecessors, (20), 16 states have call successors, (20) [2024-09-25 11:41:14,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:14,616 INFO L93 Difference]: Finished difference Result 249 states and 691 transitions. [2024-09-25 11:41:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-25 11:41:14,617 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 34 states have internal predecessors, (86), 17 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (20), 12 states have call predecessors, (20), 16 states have call successors, (20) Word has length 80 [2024-09-25 11:41:14,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:14,619 INFO L225 Difference]: With dead ends: 249 [2024-09-25 11:41:14,619 INFO L226 Difference]: Without dead ends: 229 [2024-09-25 11:41:14,621 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=629, Invalid=4921, Unknown=0, NotChecked=0, Total=5550 [2024-09-25 11:41:14,621 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 130 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:14,621 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 374 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1731 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-25 11:41:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-09-25 11:41:14,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2024-09-25 11:41:14,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 115 states have internal predecessors, (123), 22 states have call successors, (22), 12 states have call predecessors, (22), 32 states have return successors, (157), 33 states have call predecessors, (157), 20 states have call successors, (157) [2024-09-25 11:41:14,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 302 transitions. [2024-09-25 11:41:14,735 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 302 transitions. Word has length 80 [2024-09-25 11:41:14,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:14,736 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 302 transitions. [2024-09-25 11:41:14,736 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 34 states have internal predecessors, (86), 17 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (20), 12 states have call predecessors, (20), 16 states have call successors, (20) [2024-09-25 11:41:14,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:14,736 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 302 transitions. [2024-09-25 11:41:14,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-25 11:41:14,737 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:14,737 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-25 11:41:14,751 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-25 11:41:14,937 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:14,938 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:14,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:14,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1758475267, now seen corresponding path program 2 times [2024-09-25 11:41:14,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:14,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620858912] [2024-09-25 11:41:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:14,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:15,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:41:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:15,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:41:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:15,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:41:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:15,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:15,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:41:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:15,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:15,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:41:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:15,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 11:41:15,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:15,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620858912] [2024-09-25 11:41:15,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620858912] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:15,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063105173] [2024-09-25 11:41:15,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:41:15,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:15,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:15,648 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:41:15,649 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-25 11:41:15,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:41:15,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:41:15,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 11:41:15,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:15,906 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 [2024-09-25 11:41:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-25 11:41:16,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:41:16,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063105173] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:41:16,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:41:16,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 23 [2024-09-25 11:41:16,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485360441] [2024-09-25 11:41:16,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:16,366 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 11:41:16,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:16,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 11:41:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-09-25 11:41:16,367 INFO L87 Difference]: Start difference. First operand 161 states and 302 transitions. Second operand has 23 states, 18 states have (on average 4.111111111111111) internal successors, (74), 19 states have internal predecessors, (74), 11 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-25 11:41:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:17,141 INFO L93 Difference]: Finished difference Result 225 states and 510 transitions. [2024-09-25 11:41:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 11:41:17,142 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 4.111111111111111) internal successors, (74), 19 states have internal predecessors, (74), 11 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) Word has length 67 [2024-09-25 11:41:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:17,144 INFO L225 Difference]: With dead ends: 225 [2024-09-25 11:41:17,144 INFO L226 Difference]: Without dead ends: 185 [2024-09-25 11:41:17,145 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 11:41:17,145 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 92 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:17,146 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 163 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 11:41:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-09-25 11:41:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 167. [2024-09-25 11:41:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 118 states have internal predecessors, (126), 22 states have call successors, (22), 12 states have call predecessors, (22), 35 states have return successors, (165), 36 states have call predecessors, (165), 20 states have call successors, (165) [2024-09-25 11:41:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 313 transitions. [2024-09-25 11:41:17,286 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 313 transitions. Word has length 67 [2024-09-25 11:41:17,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:17,286 INFO L474 AbstractCegarLoop]: Abstraction has 167 states and 313 transitions. [2024-09-25 11:41:17,287 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 4.111111111111111) internal successors, (74), 19 states have internal predecessors, (74), 11 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-25 11:41:17,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 313 transitions. [2024-09-25 11:41:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-25 11:41:17,288 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:17,288 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-25 11:41:17,308 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-25 11:41:17,492 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-25 11:41:17,492 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:17,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:17,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1839463054, now seen corresponding path program 2 times [2024-09-25 11:41:17,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:17,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135321394] [2024-09-25 11:41:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:17,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:18,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:41:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:18,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:41:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:18,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:41:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:18,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:18,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:41:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:18,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:18,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:41:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:18,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:18,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:41:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:18,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 40 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 11:41:18,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:18,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135321394] [2024-09-25 11:41:18,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135321394] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:18,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061478799] [2024-09-25 11:41:18,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:41:18,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:18,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:18,886 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:41:18,894 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-25 11:41:19,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:41:19,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:41:19,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-25 11:41:19,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:19,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:41:19,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:41:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-25 11:41:19,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-25 11:41:19,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061478799] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:41:19,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:41:19,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 19 [2024-09-25 11:41:19,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812150521] [2024-09-25 11:41:19,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:19,656 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 11:41:19,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:19,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 11:41:19,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-25 11:41:19,657 INFO L87 Difference]: Start difference. First operand 167 states and 313 transitions. Second operand has 19 states, 18 states have (on average 4.166666666666667) internal successors, (75), 16 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-25 11:41:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:20,411 INFO L93 Difference]: Finished difference Result 348 states and 729 transitions. [2024-09-25 11:41:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 11:41:20,412 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.166666666666667) internal successors, (75), 16 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 86 [2024-09-25 11:41:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:20,414 INFO L225 Difference]: With dead ends: 348 [2024-09-25 11:41:20,414 INFO L226 Difference]: Without dead ends: 200 [2024-09-25 11:41:20,415 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 188 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=865, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 11:41:20,416 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 106 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:20,416 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 121 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 11:41:20,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-09-25 11:41:20,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 164. [2024-09-25 11:41:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 111 states have (on average 1.1261261261261262) internal successors, (125), 117 states have internal predecessors, (125), 23 states have call successors, (23), 14 states have call predecessors, (23), 29 states have return successors, (113), 32 states have call predecessors, (113), 21 states have call successors, (113) [2024-09-25 11:41:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 261 transitions. [2024-09-25 11:41:20,534 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 261 transitions. Word has length 86 [2024-09-25 11:41:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:20,534 INFO L474 AbstractCegarLoop]: Abstraction has 164 states and 261 transitions. [2024-09-25 11:41:20,534 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.166666666666667) internal successors, (75), 16 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-25 11:41:20,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 261 transitions. [2024-09-25 11:41:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-25 11:41:20,535 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:20,535 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] [2024-09-25 11:41:20,549 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-25 11:41:20,735 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:20,736 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:20,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:20,736 INFO L85 PathProgramCache]: Analyzing trace with hash 964392132, now seen corresponding path program 1 times [2024-09-25 11:41:20,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:20,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134694586] [2024-09-25 11:41:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:20,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:41:20,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538029426] [2024-09-25 11:41:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:20,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:20,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:20,770 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) [2024-09-25 11:41:20,770 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-25 11:41:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:21,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 289 conjuncts are in the unsatisfiable core [2024-09-25 11:41:21,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:21,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:41:21,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:41:21,128 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 [2024-09-25 11:41:21,131 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 [2024-09-25 11:41:21,135 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 [2024-09-25 11:41:21,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:41:21,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:41:22,818 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 [2024-09-25 11:41:23,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-25 11:41:23,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 11:41:23,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2024-09-25 11:41:23,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:41:23,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 11:41:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-25 11:41:23,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:29,214 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:41:29,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 105 [2024-09-25 11:41:30,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:41:30,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 204 [2024-09-25 11:41:32,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:32,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134694586] [2024-09-25 11:41:32,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:41:32,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538029426] [2024-09-25 11:41:32,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538029426] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:32,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:41:32,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-25 11:41:32,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889043174] [2024-09-25 11:41:32,477 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:32,477 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 11:41:32,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:32,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 11:41:32,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 11:41:32,478 INFO L87 Difference]: Start difference. First operand 164 states and 261 transitions. Second operand has 28 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 8 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 11:41:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:35,184 INFO L93 Difference]: Finished difference Result 188 states and 319 transitions. [2024-09-25 11:41:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 11:41:35,185 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 8 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 82 [2024-09-25 11:41:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:35,186 INFO L225 Difference]: With dead ends: 188 [2024-09-25 11:41:35,187 INFO L226 Difference]: Without dead ends: 182 [2024-09-25 11:41:35,187 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=278, Invalid=2272, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 11:41:35,188 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:35,188 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 297 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-25 11:41:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-09-25 11:41:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 166. [2024-09-25 11:41:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 112 states have (on average 1.125) internal successors, (126), 118 states have internal predecessors, (126), 23 states have call successors, (23), 14 states have call predecessors, (23), 30 states have return successors, (117), 33 states have call predecessors, (117), 21 states have call successors, (117) [2024-09-25 11:41:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 266 transitions. [2024-09-25 11:41:35,297 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 266 transitions. Word has length 82 [2024-09-25 11:41:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:35,298 INFO L474 AbstractCegarLoop]: Abstraction has 166 states and 266 transitions. [2024-09-25 11:41:35,298 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 8 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 11:41:35,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 266 transitions. [2024-09-25 11:41:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-25 11:41:35,299 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:35,299 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:41:35,313 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-25 11:41:35,499 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:35,500 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:35,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:35,500 INFO L85 PathProgramCache]: Analyzing trace with hash 344369898, now seen corresponding path program 1 times [2024-09-25 11:41:35,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:35,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994253112] [2024-09-25 11:41:35,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:35,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:35,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:41:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:35,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:41:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:35,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:41:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:36,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:36,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:41:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:36,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:36,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:41:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:36,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:36,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:41:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:36,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:41:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 54 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-25 11:41:36,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:36,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994253112] [2024-09-25 11:41:36,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994253112] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:36,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147811935] [2024-09-25 11:41:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:36,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:36,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:36,434 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) [2024-09-25 11:41:36,434 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-25 11:41:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:41:36,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-25 11:41:36,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:36,790 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 37 treesize of output 21 [2024-09-25 11:41:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-25 11:41:36,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-25 11:41:37,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147811935] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:41:37,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:41:37,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 34 [2024-09-25 11:41:37,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000918105] [2024-09-25 11:41:37,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:37,511 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-25 11:41:37,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:37,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-25 11:41:37,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 11:41:37,512 INFO L87 Difference]: Start difference. First operand 166 states and 266 transitions. Second operand has 34 states, 28 states have (on average 3.5) internal successors, (98), 30 states have internal predecessors, (98), 13 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (16), 10 states have call predecessors, (16), 12 states have call successors, (16) [2024-09-25 11:41:38,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:38,801 INFO L93 Difference]: Finished difference Result 385 states and 823 transitions. [2024-09-25 11:41:38,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-25 11:41:38,801 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 28 states have (on average 3.5) internal successors, (98), 30 states have internal predecessors, (98), 13 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (16), 10 states have call predecessors, (16), 12 states have call successors, (16) Word has length 86 [2024-09-25 11:41:38,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:38,803 INFO L225 Difference]: With dead ends: 385 [2024-09-25 11:41:38,804 INFO L226 Difference]: Without dead ends: 241 [2024-09-25 11:41:38,805 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=755, Invalid=3027, Unknown=0, NotChecked=0, Total=3782 [2024-09-25 11:41:38,805 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 140 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:38,805 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 252 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 11:41:38,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-09-25 11:41:38,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 195. [2024-09-25 11:41:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 141 states have internal predecessors, (152), 26 states have call successors, (26), 15 states have call predecessors, (26), 34 states have return successors, (167), 38 states have call predecessors, (167), 24 states have call successors, (167) [2024-09-25 11:41:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 345 transitions. [2024-09-25 11:41:38,967 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 345 transitions. Word has length 86 [2024-09-25 11:41:38,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:38,967 INFO L474 AbstractCegarLoop]: Abstraction has 195 states and 345 transitions. [2024-09-25 11:41:38,967 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 28 states have (on average 3.5) internal successors, (98), 30 states have internal predecessors, (98), 13 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (16), 10 states have call predecessors, (16), 12 states have call successors, (16) [2024-09-25 11:41:38,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 345 transitions. [2024-09-25 11:41:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-25 11:41:38,968 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:38,968 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2024-09-25 11:41:38,986 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-25 11:41:39,169 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-25 11:41:39,169 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:39,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:39,169 INFO L85 PathProgramCache]: Analyzing trace with hash 435681546, now seen corresponding path program 2 times [2024-09-25 11:41:39,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:39,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403934825] [2024-09-25 11:41:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:39,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:41:39,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989974805] [2024-09-25 11:41:39,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:41:39,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:39,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:39,200 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:41:39,200 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-25 11:41:39,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:41:39,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:41:39,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 206 conjuncts are in the unsatisfiable core [2024-09-25 11:41:39,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:39,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:41:39,535 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 [2024-09-25 11:41:39,539 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 [2024-09-25 11:41:39,542 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 [2024-09-25 11:41:39,547 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 [2024-09-25 11:41:39,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:41:39,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:41:40,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-09-25 11:41:40,942 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 [2024-09-25 11:41:40,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2024-09-25 11:41:41,004 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 23 treesize of output 15 [2024-09-25 11:41:41,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-09-25 11:41:41,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-09-25 11:41:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 11:41:41,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:46,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:46,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403934825] [2024-09-25 11:41:46,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:41:46,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989974805] [2024-09-25 11:41:46,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989974805] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:46,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:41:46,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-25 11:41:46,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093832055] [2024-09-25 11:41:46,287 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:46,287 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 11:41:46,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:46,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 11:41:46,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2024-09-25 11:41:46,288 INFO L87 Difference]: Start difference. First operand 195 states and 345 transitions. Second operand has 20 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-25 11:41:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:48,193 INFO L93 Difference]: Finished difference Result 211 states and 380 transitions. [2024-09-25 11:41:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 11:41:48,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 76 [2024-09-25 11:41:48,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:48,195 INFO L225 Difference]: With dead ends: 211 [2024-09-25 11:41:48,195 INFO L226 Difference]: Without dead ends: 205 [2024-09-25 11:41:48,196 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 11:41:48,196 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:48,196 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 165 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-25 11:41:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-09-25 11:41:48,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2024-09-25 11:41:48,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 143 states have internal predecessors, (154), 26 states have call successors, (26), 15 states have call predecessors, (26), 36 states have return successors, (179), 40 states have call predecessors, (179), 24 states have call successors, (179) [2024-09-25 11:41:48,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 359 transitions. [2024-09-25 11:41:48,348 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 359 transitions. Word has length 76 [2024-09-25 11:41:48,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:48,348 INFO L474 AbstractCegarLoop]: Abstraction has 199 states and 359 transitions. [2024-09-25 11:41:48,348 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-25 11:41:48,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 359 transitions. [2024-09-25 11:41:48,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-25 11:41:48,349 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:48,350 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:41:48,371 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-25 11:41:48,550 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-25 11:41:48,550 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:48,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2021405968, now seen corresponding path program 2 times [2024-09-25 11:41:48,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:48,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987893828] [2024-09-25 11:41:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:48,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:41:48,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229005566] [2024-09-25 11:41:48,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:41:48,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:48,582 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:41:48,583 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-25 11:41:48,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:41:48,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:41:48,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-09-25 11:41:48,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:48,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:41:48,918 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 [2024-09-25 11:41:48,922 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 [2024-09-25 11:41:48,926 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 [2024-09-25 11:41:48,931 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 [2024-09-25 11:41:48,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:41:48,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:41:50,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2024-09-25 11:41:50,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-09-25 11:41:50,460 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 [2024-09-25 11:41:50,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2024-09-25 11:41:50,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-25 11:41:50,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-09-25 11:41:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 11:41:50,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:41:55,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:41:55,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987893828] [2024-09-25 11:41:55,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:41:55,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229005566] [2024-09-25 11:41:55,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229005566] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:41:55,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:41:55,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-25 11:41:55,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982710860] [2024-09-25 11:41:55,073 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:41:55,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 11:41:55,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:41:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 11:41:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2024-09-25 11:41:55,074 INFO L87 Difference]: Start difference. First operand 199 states and 359 transitions. Second operand has 20 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-25 11:41:56,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:41:56,619 INFO L93 Difference]: Finished difference Result 213 states and 389 transitions. [2024-09-25 11:41:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 11:41:56,620 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 78 [2024-09-25 11:41:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:41:56,621 INFO L225 Difference]: With dead ends: 213 [2024-09-25 11:41:56,622 INFO L226 Difference]: Without dead ends: 207 [2024-09-25 11:41:56,622 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2024-09-25 11:41:56,622 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:41:56,622 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 217 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-25 11:41:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-09-25 11:41:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 201. [2024-09-25 11:41:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 137 states have (on average 1.1313868613138687) internal successors, (155), 144 states have internal predecessors, (155), 26 states have call successors, (26), 15 states have call predecessors, (26), 37 states have return successors, (185), 41 states have call predecessors, (185), 24 states have call successors, (185) [2024-09-25 11:41:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 366 transitions. [2024-09-25 11:41:56,781 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 366 transitions. Word has length 78 [2024-09-25 11:41:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:41:56,781 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 366 transitions. [2024-09-25 11:41:56,781 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-25 11:41:56,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 366 transitions. [2024-09-25 11:41:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-25 11:41:56,782 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:41:56,782 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] [2024-09-25 11:41:56,796 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-25 11:41:56,982 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-25 11:41:56,982 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:41:56,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:41:56,983 INFO L85 PathProgramCache]: Analyzing trace with hash 198232476, now seen corresponding path program 2 times [2024-09-25 11:41:56,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:41:56,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588984119] [2024-09-25 11:41:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:41:56,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:41:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:41:57,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073746706] [2024-09-25 11:41:57,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:41:57,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:41:57,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:41:57,016 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:41:57,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-25 11:41:57,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:41:57,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:41:57,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 241 conjuncts are in the unsatisfiable core [2024-09-25 11:41:57,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:41:57,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:41:57,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:41:57,374 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 [2024-09-25 11:41:57,378 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 [2024-09-25 11:41:57,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:41:57,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:41:58,405 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 [2024-09-25 11:41:59,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-09-25 11:41:59,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-25 11:41:59,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2024-09-25 11:41:59,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2024-09-25 11:41:59,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 11:41:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-25 11:41:59,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:42:02,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2024-09-25 11:42:02,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:42:02,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 36 treesize of output 40 [2024-09-25 11:42:19,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:42:19,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 271 [2024-09-25 11:42:19,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:42:19,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 221 treesize of output 291 [2024-09-25 11:42:21,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:42:21,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588984119] [2024-09-25 11:42:21,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:42:21,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073746706] [2024-09-25 11:42:21,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073746706] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:42:21,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:42:21,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-25 11:42:21,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257335661] [2024-09-25 11:42:21,707 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:42:21,708 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 11:42:21,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:42:21,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 11:42:21,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=835, Unknown=2, NotChecked=0, Total=930 [2024-09-25 11:42:21,708 INFO L87 Difference]: Start difference. First operand 201 states and 366 transitions. Second operand has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 21 states have internal predecessors, (42), 8 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 11:42:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:42:23,860 INFO L93 Difference]: Finished difference Result 213 states and 389 transitions. [2024-09-25 11:42:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 11:42:23,860 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 21 states have internal predecessors, (42), 8 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 82 [2024-09-25 11:42:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:42:23,862 INFO L225 Difference]: With dead ends: 213 [2024-09-25 11:42:23,862 INFO L226 Difference]: Without dead ends: 207 [2024-09-25 11:42:23,863 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=197, Invalid=1607, Unknown=2, NotChecked=0, Total=1806 [2024-09-25 11:42:23,863 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:42:23,863 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 264 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-25 11:42:23,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-09-25 11:42:24,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2024-09-25 11:42:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 147 states have internal predecessors, (158), 26 states have call successors, (26), 15 states have call predecessors, (26), 40 states have return successors, (198), 44 states have call predecessors, (198), 24 states have call successors, (198) [2024-09-25 11:42:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 382 transitions. [2024-09-25 11:42:24,030 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 382 transitions. Word has length 82 [2024-09-25 11:42:24,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:42:24,031 INFO L474 AbstractCegarLoop]: Abstraction has 207 states and 382 transitions. [2024-09-25 11:42:24,031 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 21 states have internal predecessors, (42), 8 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 11:42:24,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:42:24,031 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 382 transitions. [2024-09-25 11:42:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-25 11:42:24,032 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:42:24,032 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:42:24,046 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-25 11:42:24,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-25 11:42:24,232 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:42:24,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:42:24,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1760242319, now seen corresponding path program 3 times [2024-09-25 11:42:24,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:42:24,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466621304] [2024-09-25 11:42:24,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:42:24,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:42:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:42:24,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714757990] [2024-09-25 11:42:24,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:42:24,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:42:24,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:42:24,270 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:42:24,271 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-25 11:42:24,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-25 11:42:24,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:42:24,819 WARN L260 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 419 conjuncts are in the unsatisfiable core [2024-09-25 11:42:24,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:42:24,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:42:24,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 11:42:24,889 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 [2024-09-25 11:42:24,897 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 [2024-09-25 11:42:24,901 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 [2024-09-25 11:42:24,909 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 [2024-09-25 11:42:24,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:42:24,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 11:42:29,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 32 [2024-09-25 11:42:29,862 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-25 11:42:29,863 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 3 [2024-09-25 11:42:29,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2024-09-25 11:42:29,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 11:42:29,993 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 70 treesize of output 50 [2024-09-25 11:42:30,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2024-09-25 11:42:30,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 11:42:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 17 proven. 62 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-25 11:42:30,171 INFO L327 TraceCheckSpWp]: Computing backward predicates...