./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1d5fa637 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-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 dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 09:58:18,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 09:58:18,878 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 09:58:18,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 09:58:18,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 09:58:18,909 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 09:58:18,910 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 09:58:18,910 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 09:58:18,910 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 09:58:18,910 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 09:58:18,911 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 09:58:18,911 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 09:58:18,913 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 09:58:18,914 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 09:58:18,916 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 09:58:18,916 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 09:58:18,916 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 09:58:18,916 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 09:58:18,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 09:58:18,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 09:58:18,917 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 09:58:18,919 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 09:58:18,919 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 09:58:18,919 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 09:58:18,920 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 09:58:18,921 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 09:58:18,921 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 09:58:18,921 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 09:58:18,921 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 09:58:18,921 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 09:58:18,922 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 09:58:18,922 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 09:58:18,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:58:18,922 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 09:58:18,923 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 09:58:18,923 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 09:58:18,923 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 09:58:18,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 09:58:18,924 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 09:58:18,924 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 09:58:18,924 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 09:58:18,924 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 09:58:18,925 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 09:58:19,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 09:58:19,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 09:58:19,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 09:58:19,149 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 09:58:19,149 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 09:58:19,150 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-09-13 09:58:20,385 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 09:58:20,552 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 09:58:20,555 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-09-13 09:58:20,561 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/663a2034b/548abd4dda6d47b88505c6aaa2f284b1/FLAG3e8d85227 [2024-09-13 09:58:20,974 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/663a2034b/548abd4dda6d47b88505c6aaa2f284b1 [2024-09-13 09:58:20,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 09:58:20,977 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 09:58:20,978 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 09:58:20,978 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 09:58:20,983 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 09:58:20,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:58:20" (1/1) ... [2024-09-13 09:58:20,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a5c99ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:20, skipping insertion in model container [2024-09-13 09:58:20,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:58:20" (1/1) ... [2024-09-13 09:58:21,006 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 09:58:21,137 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c[1083,1096] [2024-09-13 09:58:21,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:58:21,164 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 09:58:21,173 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c[1083,1096] [2024-09-13 09:58:21,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:58:21,193 INFO L204 MainTranslator]: Completed translation [2024-09-13 09:58:21,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21 WrapperNode [2024-09-13 09:58:21,194 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 09:58:21,194 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 09:58:21,194 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 09:58:21,195 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 09:58:21,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (1/1) ... [2024-09-13 09:58:21,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (1/1) ... [2024-09-13 09:58:21,219 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 09:58:21,219 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 09:58:21,220 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 09:58:21,220 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 09:58:21,220 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 09:58:21,227 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (1/1) ... [2024-09-13 09:58:21,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (1/1) ... [2024-09-13 09:58:21,230 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (1/1) ... [2024-09-13 09:58:21,243 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 9, 5, 6, 7, 8, 12]. 24 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 3, 1, 2, 1, 2, 3]. [2024-09-13 09:58:21,244 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (1/1) ... [2024-09-13 09:58:21,244 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (1/1) ... [2024-09-13 09:58:21,249 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (1/1) ... [2024-09-13 09:58:21,250 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (1/1) ... [2024-09-13 09:58:21,251 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (1/1) ... [2024-09-13 09:58:21,252 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (1/1) ... [2024-09-13 09:58:21,255 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 09:58:21,255 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 09:58:21,255 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 09:58:21,256 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 09:58:21,256 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (1/1) ... [2024-09-13 09:58:21,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:58:21,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:21,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 09:58:21,284 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 09:58:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 09:58:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 09:58:21,318 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 09:58:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 09:58:21,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 09:58:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 09:58:21,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-13 09:58:21,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-13 09:58:21,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-13 09:58:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-13 09:58:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-13 09:58:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-13 09:58:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_51_0 [2024-09-13 09:58:21,322 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_51_0 [2024-09-13 09:58:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-13 09:58:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_38_0 [2024-09-13 09:58:21,323 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_38_0 [2024-09-13 09:58:21,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-13 09:58:21,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-13 09:58:21,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-13 09:58:21,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-13 09:58:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-13 09:58:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-13 09:58:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-13 09:58:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 09:58:21,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 09:58:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 09:58:21,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 09:58:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-13 09:58:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-13 09:58:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-13 09:58:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-13 09:58:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-13 09:58:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-13 09:58:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-13 09:58:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 09:58:21,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 09:58:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-13 09:58:21,414 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 09:58:21,416 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 09:58:21,655 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-13 09:58:21,655 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 09:58:21,670 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 09:58:21,670 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 09:58:21,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:58:21 BoogieIcfgContainer [2024-09-13 09:58:21,671 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 09:58:21,672 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 09:58:21,673 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 09:58:21,675 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 09:58:21,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 09:58:20" (1/3) ... [2024-09-13 09:58:21,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eff522f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:58:21, skipping insertion in model container [2024-09-13 09:58:21,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:58:21" (2/3) ... [2024-09-13 09:58:21,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eff522f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:58:21, skipping insertion in model container [2024-09-13 09:58:21,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:58:21" (3/3) ... [2024-09-13 09:58:21,678 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard-ll.c [2024-09-13 09:58:21,691 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 09:58:21,691 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 09:58:21,746 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 09:58:21,753 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;@2fdab653, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 09:58:21,753 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 09:58:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-13 09:58:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-13 09:58:21,764 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:21,765 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:58:21,766 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:21,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash -261209268, now seen corresponding path program 1 times [2024-09-13 09:58:21,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:21,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67100056] [2024-09-13 09:58:21,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:21,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:22,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:58:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:22,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:58:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:58:22,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:22,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67100056] [2024-09-13 09:58:22,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67100056] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:58:22,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:58:22,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 09:58:22,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773656110] [2024-09-13 09:58:22,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:58:22,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:58:22,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:22,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:58:22,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:58:22,360 INFO L87 Difference]: Start difference. First operand has 50 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 09:58:22,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:22,510 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2024-09-13 09:58:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 09:58:22,518 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-13 09:58:22,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:22,525 INFO L225 Difference]: With dead ends: 96 [2024-09-13 09:58:22,525 INFO L226 Difference]: Without dead ends: 50 [2024-09-13 09:58:22,528 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:58:22,532 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:22,533 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 296 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:58:22,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-13 09:58:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-13 09:58:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-13 09:58:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-09-13 09:58:22,569 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 18 [2024-09-13 09:58:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:22,569 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-09-13 09:58:22,570 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 09:58:22,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-09-13 09:58:22,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-13 09:58:22,571 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:22,571 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] [2024-09-13 09:58:22,571 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 09:58:22,571 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:22,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:22,571 INFO L85 PathProgramCache]: Analyzing trace with hash 249081250, now seen corresponding path program 1 times [2024-09-13 09:58:22,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:22,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764766388] [2024-09-13 09:58:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:22,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:22,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:58:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:22,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:58:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:22,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 09:58:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:58:22,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:22,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764766388] [2024-09-13 09:58:22,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764766388] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:58:22,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:58:22,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 09:58:22,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93015424] [2024-09-13 09:58:22,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:58:22,963 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:58:22,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:22,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:58:22,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:58:22,966 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 09:58:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:23,157 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2024-09-13 09:58:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 09:58:23,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-13 09:58:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:23,158 INFO L225 Difference]: With dead ends: 56 [2024-09-13 09:58:23,158 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 09:58:23,159 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:58:23,159 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 17 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:23,160 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 279 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:58:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 09:58:23,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-13 09:58:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-13 09:58:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-09-13 09:58:23,171 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 24 [2024-09-13 09:58:23,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:23,172 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-09-13 09:58:23,172 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 09:58:23,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-09-13 09:58:23,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 09:58:23,173 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:23,173 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] [2024-09-13 09:58:23,173 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 09:58:23,173 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:23,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:23,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1395279990, now seen corresponding path program 1 times [2024-09-13 09:58:23,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:23,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139908047] [2024-09-13 09:58:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:23,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:23,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827063095] [2024-09-13 09:58:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:23,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:23,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:23,196 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:58:23,197 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 09:58:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:23,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-13 09:58:23,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:23,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:58:23,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 09:58:23,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:58:23,676 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 21 treesize of output 13 [2024-09-13 09:58:23,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-13 09:58:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 09:58:23,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 09:58:23,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:23,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139908047] [2024-09-13 09:58:23,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:23,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827063095] [2024-09-13 09:58:23,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827063095] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:23,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:23,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-13 09:58:23,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034879262] [2024-09-13 09:58:23,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:58:23,841 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:58:23,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:23,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:58:23,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:58:23,842 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:58:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:24,086 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2024-09-13 09:58:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:58:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-09-13 09:58:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:24,088 INFO L225 Difference]: With dead ends: 65 [2024-09-13 09:58:24,088 INFO L226 Difference]: Without dead ends: 63 [2024-09-13 09:58:24,089 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-13 09:58:24,089 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 15 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:24,090 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 271 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 09:58:24,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-13 09:58:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2024-09-13 09:58:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-13 09:58:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2024-09-13 09:58:24,114 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 30 [2024-09-13 09:58:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:24,115 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2024-09-13 09:58:24,115 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:58:24,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2024-09-13 09:58:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 09:58:24,116 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:24,116 INFO L216 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:58:24,124 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 09:58:24,317 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:24,317 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:24,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:24,318 INFO L85 PathProgramCache]: Analyzing trace with hash -127824258, now seen corresponding path program 1 times [2024-09-13 09:58:24,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:24,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428261852] [2024-09-13 09:58:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:24,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:24,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734015851] [2024-09-13 09:58:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:24,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:24,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:24,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:58:24,360 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 09:58:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:24,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-13 09:58:24,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:24,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:58:24,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 09:58:24,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:58:24,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 09:58:24,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:58:25,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-13 09:58:25,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:58:25,174 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 41 treesize of output 37 [2024-09-13 09:58:25,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:58:25,182 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 35 treesize of output 35 [2024-09-13 09:58:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 09:58:25,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:25,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:25,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428261852] [2024-09-13 09:58:25,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:25,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734015851] [2024-09-13 09:58:25,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734015851] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:25,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:25,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 09:58:25,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256698131] [2024-09-13 09:58:25,759 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:58:25,759 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 09:58:25,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 09:58:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2024-09-13 09:58:25,760 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 18 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 09:58:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:27,044 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2024-09-13 09:58:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 09:58:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2024-09-13 09:58:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:27,047 INFO L225 Difference]: With dead ends: 104 [2024-09-13 09:58:27,047 INFO L226 Difference]: Without dead ends: 102 [2024-09-13 09:58:27,047 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 09:58:27,048 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 60 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:27,048 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 264 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 09:58:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-13 09:58:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2024-09-13 09:58:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 65 states have internal predecessors, (69), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (32), 21 states have call predecessors, (32), 20 states have call successors, (32) [2024-09-13 09:58:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2024-09-13 09:58:27,070 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 42 [2024-09-13 09:58:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:27,070 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2024-09-13 09:58:27,070 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 09:58:27,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:27,071 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2024-09-13 09:58:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 09:58:27,071 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:27,072 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:58:27,088 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 09:58:27,275 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:27,275 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:27,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:27,276 INFO L85 PathProgramCache]: Analyzing trace with hash -782540599, now seen corresponding path program 1 times [2024-09-13 09:58:27,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:27,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808645395] [2024-09-13 09:58:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:27,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:27,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008202049] [2024-09-13 09:58:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:27,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:27,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:27,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:58:27,304 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 09:58:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:27,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 09:58:27,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:27,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:58:27,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 09:58:27,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:58:27,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-13 09:58:27,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-13 09:58:27,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-13 09:58:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:58:27,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:27,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:27,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808645395] [2024-09-13 09:58:27,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:27,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008202049] [2024-09-13 09:58:27,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008202049] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:27,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:27,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-13 09:58:27,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100107968] [2024-09-13 09:58:27,784 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:58:27,784 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 09:58:27,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:27,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 09:58:27,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-09-13 09:58:27,785 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-13 09:58:28,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:28,268 INFO L93 Difference]: Finished difference Result 153 states and 178 transitions. [2024-09-13 09:58:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 09:58:28,269 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2024-09-13 09:58:28,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:28,271 INFO L225 Difference]: With dead ends: 153 [2024-09-13 09:58:28,271 INFO L226 Difference]: Without dead ends: 151 [2024-09-13 09:58:28,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-09-13 09:58:28,273 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:28,273 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 133 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 09:58:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-13 09:58:28,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2024-09-13 09:58:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 94 states have (on average 1.127659574468085) internal successors, (106), 99 states have internal predecessors, (106), 30 states have call successors, (30), 21 states have call predecessors, (30), 24 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2024-09-13 09:58:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2024-09-13 09:58:28,308 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 48 [2024-09-13 09:58:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:28,308 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2024-09-13 09:58:28,308 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-13 09:58:28,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2024-09-13 09:58:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 09:58:28,310 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:28,310 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:58:28,340 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 09:58:28,513 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:28,514 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:28,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:28,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1885035655, now seen corresponding path program 1 times [2024-09-13 09:58:28,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:28,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053886322] [2024-09-13 09:58:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:28,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:28,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773614462] [2024-09-13 09:58:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:28,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:28,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:28,543 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:58:28,544 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 09:58:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:28,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 09:58:28,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:28,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:58:28,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:58:28,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 09:58:28,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-13 09:58:28,866 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 21 treesize of output 13 [2024-09-13 09:58:28,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-13 09:58:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-13 09:58:28,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:29,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:29,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053886322] [2024-09-13 09:58:29,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:29,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773614462] [2024-09-13 09:58:29,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773614462] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:29,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:29,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-13 09:58:29,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067602673] [2024-09-13 09:58:29,090 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:58:29,090 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:58:29,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:58:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-13 09:58:29,091 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-13 09:58:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:29,545 INFO L93 Difference]: Finished difference Result 164 states and 191 transitions. [2024-09-13 09:58:29,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:58:29,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2024-09-13 09:58:29,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:29,549 INFO L225 Difference]: With dead ends: 164 [2024-09-13 09:58:29,549 INFO L226 Difference]: Without dead ends: 160 [2024-09-13 09:58:29,549 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:58:29,549 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:29,550 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 93 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 245 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 09:58:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-13 09:58:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2024-09-13 09:58:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 104 states have internal predecessors, (110), 31 states have call successors, (31), 23 states have call predecessors, (31), 25 states have return successors, (41), 29 states have call predecessors, (41), 27 states have call successors, (41) [2024-09-13 09:58:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 182 transitions. [2024-09-13 09:58:29,601 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 182 transitions. Word has length 58 [2024-09-13 09:58:29,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:29,602 INFO L474 AbstractCegarLoop]: Abstraction has 156 states and 182 transitions. [2024-09-13 09:58:29,602 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-13 09:58:29,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 182 transitions. [2024-09-13 09:58:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 09:58:29,605 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:29,605 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:58:29,619 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 09:58:29,805 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 [2024-09-13 09:58:29,805 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:29,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:29,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1428903809, now seen corresponding path program 1 times [2024-09-13 09:58:29,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:29,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148984702] [2024-09-13 09:58:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:29,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:29,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:58:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:29,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:58:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:29,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:58:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:58:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:58:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 09:58:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 09:58:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-13 09:58:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 09:58:30,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:30,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148984702] [2024-09-13 09:58:30,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148984702] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:58:30,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:58:30,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 09:58:30,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136400763] [2024-09-13 09:58:30,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:58:30,028 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:58:30,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:30,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:58:30,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:58:30,029 INFO L87 Difference]: Start difference. First operand 156 states and 182 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-13 09:58:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:30,219 INFO L93 Difference]: Finished difference Result 196 states and 228 transitions. [2024-09-13 09:58:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 09:58:30,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 59 [2024-09-13 09:58:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:30,220 INFO L225 Difference]: With dead ends: 196 [2024-09-13 09:58:30,220 INFO L226 Difference]: Without dead ends: 141 [2024-09-13 09:58:30,221 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:58:30,221 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:30,222 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 110 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:58:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-13 09:58:30,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2024-09-13 09:58:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 91 states have internal predecessors, (95), 28 states have call successors, (28), 21 states have call predecessors, (28), 21 states have return successors, (30), 26 states have call predecessors, (30), 24 states have call successors, (30) [2024-09-13 09:58:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2024-09-13 09:58:30,288 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 59 [2024-09-13 09:58:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:30,288 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2024-09-13 09:58:30,289 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-13 09:58:30,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2024-09-13 09:58:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-13 09:58:30,290 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:30,290 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:58:30,290 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-13 09:58:30,290 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:30,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:30,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2096548347, now seen corresponding path program 1 times [2024-09-13 09:58:30,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:30,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843021972] [2024-09-13 09:58:30,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:30,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:58:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:58:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:58:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:58:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:58:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 09:58:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-13 09:58:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:58:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:58:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-13 09:58:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 09:58:30,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:30,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843021972] [2024-09-13 09:58:30,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843021972] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:58:30,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:58:30,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-13 09:58:30,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898182884] [2024-09-13 09:58:30,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:58:30,909 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 09:58:30,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 09:58:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-09-13 09:58:30,910 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-13 09:58:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:31,361 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2024-09-13 09:58:31,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 09:58:31,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 64 [2024-09-13 09:58:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:31,362 INFO L225 Difference]: With dead ends: 143 [2024-09-13 09:58:31,362 INFO L226 Difference]: Without dead ends: 111 [2024-09-13 09:58:31,363 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-09-13 09:58:31,363 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:31,363 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 123 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 09:58:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-13 09:58:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2024-09-13 09:58:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 71 states have internal predecessors, (74), 23 states have call successors, (23), 16 states have call predecessors, (23), 16 states have return successors, (25), 21 states have call predecessors, (25), 20 states have call successors, (25) [2024-09-13 09:58:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2024-09-13 09:58:31,387 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 64 [2024-09-13 09:58:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:31,387 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2024-09-13 09:58:31,387 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-13 09:58:31,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:31,387 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2024-09-13 09:58:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-13 09:58:31,388 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:31,388 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:58:31,388 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-13 09:58:31,389 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:31,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash 46413415, now seen corresponding path program 1 times [2024-09-13 09:58:31,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:31,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191022194] [2024-09-13 09:58:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:31,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:31,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129255207] [2024-09-13 09:58:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:31,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:31,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:31,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:58:31,428 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 09:58:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:31,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-13 09:58:31,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:31,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:58:31,547 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 17 treesize of output 13 [2024-09-13 09:58:31,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:58:31,856 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 21 treesize of output 13 [2024-09-13 09:58:31,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-13 09:58:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-13 09:58:31,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-13 09:58:32,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:32,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191022194] [2024-09-13 09:58:32,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:32,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129255207] [2024-09-13 09:58:32,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129255207] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:32,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:32,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-09-13 09:58:32,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021009569] [2024-09-13 09:58:32,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:58:32,045 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:58:32,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:58:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-13 09:58:32,046 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:58:32,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:32,213 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2024-09-13 09:58:32,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:58:32,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2024-09-13 09:58:32,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:32,214 INFO L225 Difference]: With dead ends: 118 [2024-09-13 09:58:32,214 INFO L226 Difference]: Without dead ends: 116 [2024-09-13 09:58:32,214 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:58:32,215 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 19 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:32,215 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 303 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:58:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-13 09:58:32,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2024-09-13 09:58:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 70 states have (on average 1.1) internal successors, (77), 74 states have internal predecessors, (77), 23 states have call successors, (23), 17 states have call predecessors, (23), 17 states have return successors, (25), 21 states have call predecessors, (25), 20 states have call successors, (25) [2024-09-13 09:58:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2024-09-13 09:58:32,238 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 66 [2024-09-13 09:58:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:32,238 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2024-09-13 09:58:32,238 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:58:32,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2024-09-13 09:58:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-13 09:58:32,239 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:32,239 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:58:32,253 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 09:58:32,439 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:32,440 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:32,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1617999346, now seen corresponding path program 1 times [2024-09-13 09:58:32,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:32,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960343015] [2024-09-13 09:58:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:32,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:32,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989897168] [2024-09-13 09:58:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:32,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:32,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:32,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:58:32,481 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 09:58:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:32,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-09-13 09:58:32,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:32,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:58:32,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:58:32,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 09:58:32,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:58:32,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 09:58:32,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-13 09:58:33,183 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 31 treesize of output 19 [2024-09-13 09:58:33,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 09:58:33,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-13 09:58:33,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 09:58:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-13 09:58:33,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:33,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:33,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960343015] [2024-09-13 09:58:33,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:33,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989897168] [2024-09-13 09:58:33,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989897168] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:33,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:33,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-13 09:58:33,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634409568] [2024-09-13 09:58:33,887 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:58:33,887 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 09:58:33,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:33,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 09:58:33,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-09-13 09:58:33,888 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-13 09:58:38,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 09:58:42,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 09:58:46,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 09:58:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:46,770 INFO L93 Difference]: Finished difference Result 151 states and 168 transitions. [2024-09-13 09:58:46,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 09:58:46,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 72 [2024-09-13 09:58:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:46,772 INFO L225 Difference]: With dead ends: 151 [2024-09-13 09:58:46,772 INFO L226 Difference]: Without dead ends: 147 [2024-09-13 09:58:46,772 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2024-09-13 09:58:46,772 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 55 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 33 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:46,773 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 252 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 549 Invalid, 3 Unknown, 0 Unchecked, 12.6s Time] [2024-09-13 09:58:46,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-13 09:58:46,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2024-09-13 09:58:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 94 states have internal predecessors, (99), 28 states have call successors, (28), 22 states have call predecessors, (28), 23 states have return successors, (35), 27 states have call predecessors, (35), 24 states have call successors, (35) [2024-09-13 09:58:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 162 transitions. [2024-09-13 09:58:46,821 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 162 transitions. Word has length 72 [2024-09-13 09:58:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:46,821 INFO L474 AbstractCegarLoop]: Abstraction has 143 states and 162 transitions. [2024-09-13 09:58:46,822 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-13 09:58:46,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 162 transitions. [2024-09-13 09:58:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-13 09:58:46,823 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:46,823 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 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] [2024-09-13 09:58:46,830 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 09:58:47,027 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 09:58:47,027 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:47,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash -851672613, now seen corresponding path program 2 times [2024-09-13 09:58:47,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:47,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466417838] [2024-09-13 09:58:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:47,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:47,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60468806] [2024-09-13 09:58:47,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:58:47,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:47,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:47,130 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:58:47,131 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 09:58:47,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:58:47,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:58:47,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-13 09:58:47,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:47,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:58:47,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 09:58:47,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:58:47,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-13 09:58:47,612 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 31 treesize of output 19 [2024-09-13 09:58:47,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 09:58:47,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-13 09:58:47,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 09:58:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 54 proven. 25 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-13 09:58:47,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:48,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:48,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466417838] [2024-09-13 09:58:48,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:48,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60468806] [2024-09-13 09:58:48,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60468806] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:48,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:48,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-13 09:58:48,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644746038] [2024-09-13 09:58:48,586 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:58:48,586 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 09:58:48,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:48,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 09:58:48,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-09-13 09:58:48,587 INFO L87 Difference]: Start difference. First operand 143 states and 162 transitions. Second operand has 15 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-13 09:58:49,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:49,430 INFO L93 Difference]: Finished difference Result 181 states and 204 transitions. [2024-09-13 09:58:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 09:58:49,430 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 96 [2024-09-13 09:58:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:49,432 INFO L225 Difference]: With dead ends: 181 [2024-09-13 09:58:49,432 INFO L226 Difference]: Without dead ends: 177 [2024-09-13 09:58:49,433 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2024-09-13 09:58:49,433 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 37 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:49,433 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 255 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 09:58:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-13 09:58:49,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 145. [2024-09-13 09:58:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 95 states have internal predecessors, (100), 28 states have call successors, (28), 22 states have call predecessors, (28), 24 states have return successors, (37), 28 states have call predecessors, (37), 24 states have call successors, (37) [2024-09-13 09:58:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2024-09-13 09:58:49,474 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 96 [2024-09-13 09:58:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:49,474 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2024-09-13 09:58:49,474 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-13 09:58:49,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2024-09-13 09:58:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-13 09:58:49,476 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:49,476 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2024-09-13 09:58:49,489 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 09:58:49,676 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:49,677 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:49,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:49,677 INFO L85 PathProgramCache]: Analyzing trace with hash 129307780, now seen corresponding path program 3 times [2024-09-13 09:58:49,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:49,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624311706] [2024-09-13 09:58:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:49,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:49,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276645158] [2024-09-13 09:58:49,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:58:49,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:49,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:49,754 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:58:49,763 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 09:58:49,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 09:58:49,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:58:49,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 185 conjuncts are in the unsatisfiable core [2024-09-13 09:58:50,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:50,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:58:50,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:58:50,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 09:58:50,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-13 09:58:50,974 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 31 treesize of output 19 [2024-09-13 09:58:50,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 09:58:51,242 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 23 treesize of output 15 [2024-09-13 09:58:51,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:58:51,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2024-09-13 09:58:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 48 proven. 64 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2024-09-13 09:58:51,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:56,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-09-13 09:58:56,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-13 09:59:11,993 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_31| Int) (|v_func_to_recursive_line_31_to_38_0_#in~B.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_25| Int) (|v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_31| Int) (|v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_25| Int) (|v_func_to_recursive_line_31_to_38_0_#in~B.base_BEFORE_CALL_17| Int)) (let ((.cse1 (mod (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_38_0_#in~B.base_BEFORE_CALL_17|) |v_func_to_recursive_line_31_to_38_0_#in~B.offset_BEFORE_CALL_17|) 4294967296))) (or (not (= (* (select (select (store |c_old(#memory_int#1)| |c_func_to_recursive_line_31_to_38_0_#in~p.base| (let ((.cse0 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_31_to_38_0_#in~p.base|))) (store .cse0 |c_func_to_recursive_line_31_to_38_0_#in~p.offset| (* (select .cse0 |c_func_to_recursive_line_31_to_38_0_#in~p.offset|) 4)))) |v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_25|) |v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_25|) .cse1) (select (select (store |c_old(#memory_int#6)| |c_func_to_recursive_line_31_to_38_0_#in~d.base| (let ((.cse2 (select |c_old(#memory_int#6)| |c_func_to_recursive_line_31_to_38_0_#in~d.base|))) (store .cse2 |c_func_to_recursive_line_31_to_38_0_#in~d.offset| (* (select .cse2 |c_func_to_recursive_line_31_to_38_0_#in~d.offset|) 4)))) |v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_31|) |v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_31|))) (= (select (select (store |c_#memory_int#6| c_func_to_recursive_line_31_to_38_0_~d.base (let ((.cse3 (select |c_#memory_int#6| c_func_to_recursive_line_31_to_38_0_~d.base))) (store .cse3 c_func_to_recursive_line_31_to_38_0_~d.offset (* 2 (select .cse3 c_func_to_recursive_line_31_to_38_0_~d.offset))))) |v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_31|) |v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_31|) (* (select (select (store |c_#memory_int#1| c_func_to_recursive_line_31_to_38_0_~p.base (let ((.cse4 (select |c_#memory_int#1| c_func_to_recursive_line_31_to_38_0_~p.base))) (store .cse4 c_func_to_recursive_line_31_to_38_0_~p.offset (* (select .cse4 c_func_to_recursive_line_31_to_38_0_~p.offset) 2)))) |v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_25|) |v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_25|) .cse1))))) is different from false [2024-09-13 09:59:11,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:59:11,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624311706] [2024-09-13 09:59:11,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:59:11,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276645158] [2024-09-13 09:59:11,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276645158] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:59:12,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:59:12,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-13 09:59:12,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138712472] [2024-09-13 09:59:12,000 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:59:12,000 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 09:59:12,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:59:12,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 09:59:12,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=4, NotChecked=60, Total=1056 [2024-09-13 09:59:12,005 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand has 23 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 19 states have internal predecessors, (35), 11 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-13 09:59:16,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 09:59:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:59:17,605 INFO L93 Difference]: Finished difference Result 183 states and 207 transitions. [2024-09-13 09:59:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 09:59:17,607 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 19 states have internal predecessors, (35), 11 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) Word has length 120 [2024-09-13 09:59:17,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:59:17,608 INFO L225 Difference]: With dead ends: 183 [2024-09-13 09:59:17,608 INFO L226 Difference]: Without dead ends: 179 [2024-09-13 09:59:17,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=175, Invalid=1307, Unknown=4, NotChecked=74, Total=1560 [2024-09-13 09:59:17,609 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 53 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:59:17,609 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 369 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1061 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2024-09-13 09:59:17,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-13 09:59:17,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 147. [2024-09-13 09:59:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 93 states have (on average 1.086021505376344) internal successors, (101), 96 states have internal predecessors, (101), 28 states have call successors, (28), 22 states have call predecessors, (28), 25 states have return successors, (39), 29 states have call predecessors, (39), 24 states have call successors, (39) [2024-09-13 09:59:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 168 transitions. [2024-09-13 09:59:17,667 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 168 transitions. Word has length 120 [2024-09-13 09:59:17,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:59:17,668 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 168 transitions. [2024-09-13 09:59:17,668 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 19 states have internal predecessors, (35), 11 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-13 09:59:17,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:17,668 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 168 transitions. [2024-09-13 09:59:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-09-13 09:59:17,669 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:59:17,669 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:59:17,679 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-13 09:59:17,873 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:59:17,874 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:59:17,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2139308563, now seen corresponding path program 4 times [2024-09-13 09:59:17,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:59:17,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937365201] [2024-09-13 09:59:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:59:17,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:59:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:59:17,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465482754] [2024-09-13 09:59:17,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:59:17,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:59:17,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:59:17,967 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:59:17,968 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 09:59:18,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:59:18,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:59:18,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 261 conjuncts are in the unsatisfiable core [2024-09-13 09:59:18,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:59:18,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:59:18,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 09:59:18,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:59:18,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 09:59:18,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 09:59:18,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-13 09:59:18,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:59:20,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:59:20,273 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 53 treesize of output 37 [2024-09-13 09:59:20,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-09-13 09:59:20,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 09:59:20,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-13 09:59:20,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 09:59:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2024-09-13 09:59:20,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:59:27,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-09-13 09:59:27,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-13 09:59:47,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:59:47,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937365201] [2024-09-13 09:59:47,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:59:47,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465482754] [2024-09-13 09:59:47,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465482754] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:59:47,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:59:47,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2024-09-13 09:59:47,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039234026] [2024-09-13 09:59:47,477 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:59:47,477 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-13 09:59:47,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:59:47,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-13 09:59:47,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1421, Unknown=5, NotChecked=0, Total=1560 [2024-09-13 09:59:47,479 INFO L87 Difference]: Start difference. First operand 147 states and 168 transitions. Second operand has 29 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 25 states have internal predecessors, (47), 13 states have call successors, (20), 6 states have call predecessors, (20), 9 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2024-09-13 09:59:53,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 09:59:58,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 10:00:02,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 10:00:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:02,566 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2024-09-13 10:00:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-13 10:00:02,566 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 25 states have internal predecessors, (47), 13 states have call successors, (20), 6 states have call predecessors, (20), 9 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) Word has length 144 [2024-09-13 10:00:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:02,568 INFO L225 Difference]: With dead ends: 185 [2024-09-13 10:00:02,568 INFO L226 Difference]: Without dead ends: 181 [2024-09-13 10:00:02,569 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=292, Invalid=2895, Unknown=5, NotChecked=0, Total=3192 [2024-09-13 10:00:02,569 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 57 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 40 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:02,569 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 415 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1215 Invalid, 3 Unknown, 0 Unchecked, 13.5s Time] [2024-09-13 10:00:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-09-13 10:00:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 149. [2024-09-13 10:00:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 97 states have internal predecessors, (102), 28 states have call successors, (28), 22 states have call predecessors, (28), 26 states have return successors, (41), 30 states have call predecessors, (41), 24 states have call successors, (41) [2024-09-13 10:00:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 171 transitions. [2024-09-13 10:00:02,658 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 171 transitions. Word has length 144 [2024-09-13 10:00:02,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:02,662 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 171 transitions. [2024-09-13 10:00:02,662 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 25 states have internal predecessors, (47), 13 states have call successors, (20), 6 states have call predecessors, (20), 9 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2024-09-13 10:00:02,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:02,663 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 171 transitions. [2024-09-13 10:00:02,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-09-13 10:00:02,667 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:02,667 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:02,676 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 10:00:02,867 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-13 10:00:02,868 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:02,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:02,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1377710570, now seen corresponding path program 5 times [2024-09-13 10:00:02,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:02,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017769773] [2024-09-13 10:00:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:02,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:00:02,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431128923] [2024-09-13 10:00:02,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 10:00:02,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:02,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:02,968 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:00:02,972 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 10:00:04,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-13 10:00:04,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:00:04,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-09-13 10:00:04,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:00:04,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:04,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 10:00:04,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:04,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-13 10:00:04,895 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 31 treesize of output 19 [2024-09-13 10:00:04,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:00:05,190 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 [2024-09-13 10:00:05,192 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 19 treesize of output 11 [2024-09-13 10:00:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 110 proven. 125 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2024-09-13 10:00:05,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:00:07,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:07,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017769773] [2024-09-13 10:00:07,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:00:07,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431128923] [2024-09-13 10:00:07,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431128923] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:00:07,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:00:07,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 10:00:07,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527380858] [2024-09-13 10:00:07,028 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:00:07,028 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 10:00:07,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:07,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 10:00:07,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2024-09-13 10:00:07,029 INFO L87 Difference]: Start difference. First operand 149 states and 171 transitions. Second operand has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 states have internal predecessors, (40), 10 states have call successors, (15), 5 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-09-13 10:00:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:08,479 INFO L93 Difference]: Finished difference Result 187 states and 213 transitions. [2024-09-13 10:00:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 10:00:08,479 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 states have internal predecessors, (40), 10 states have call successors, (15), 5 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) Word has length 168 [2024-09-13 10:00:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:08,481 INFO L225 Difference]: With dead ends: 187 [2024-09-13 10:00:08,481 INFO L226 Difference]: Without dead ends: 183 [2024-09-13 10:00:08,481 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2024-09-13 10:00:08,482 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 39 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:08,482 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 397 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 10:00:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-09-13 10:00:08,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 151. [2024-09-13 10:00:08,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 98 states have internal predecessors, (103), 28 states have call successors, (28), 22 states have call predecessors, (28), 27 states have return successors, (43), 31 states have call predecessors, (43), 24 states have call successors, (43) [2024-09-13 10:00:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 174 transitions. [2024-09-13 10:00:08,540 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 174 transitions. Word has length 168 [2024-09-13 10:00:08,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:08,540 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 174 transitions. [2024-09-13 10:00:08,541 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 states have internal predecessors, (40), 10 states have call successors, (15), 5 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-09-13 10:00:08,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:08,541 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 174 transitions. [2024-09-13 10:00:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-13 10:00:08,541 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:08,542 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:08,551 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 10:00:08,745 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 10:00:08,746 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:08,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:08,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2080657482, now seen corresponding path program 1 times [2024-09-13 10:00:08,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:08,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010828481] [2024-09-13 10:00:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:08,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:00:08,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855842688] [2024-09-13 10:00:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:08,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:08,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:08,844 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:00:08,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 10:00:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:00:09,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 250 conjuncts are in the unsatisfiable core [2024-09-13 10:00:09,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:00:09,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:09,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:09,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 10:00:09,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 10:00:09,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:09,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:09,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-13 10:00:10,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:00:10,870 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 42 treesize of output 26 [2024-09-13 10:00:10,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:00:12,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 66 [2024-09-13 10:00:12,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:00:12,842 INFO L349 Elim1Store]: treesize reduction 98, result has 43.0 percent of original size [2024-09-13 10:00:12,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 106 treesize of output 145 [2024-09-13 10:00:12,866 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 33 treesize of output 25 [2024-09-13 10:00:12,959 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-13 10:00:12,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-13 10:00:13,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 10:00:13,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 64 [2024-09-13 10:00:13,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 10:00:13,412 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 106 treesize of output 158 [2024-09-13 10:00:13,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 10:00:13,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 116 treesize of output 192 [2024-09-13 10:00:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 48 proven. 53 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-13 10:00:13,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:00:16,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:00:16,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010828481] [2024-09-13 10:00:16,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:00:16,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855842688] [2024-09-13 10:00:16,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855842688] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:00:16,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:00:16,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2024-09-13 10:00:16,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931447371] [2024-09-13 10:00:16,336 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:00:16,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 10:00:16,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:00:16,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 10:00:16,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1430, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 10:00:16,337 INFO L87 Difference]: Start difference. First operand 151 states and 174 transitions. Second operand has 32 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 14 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (12), 9 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-13 10:00:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:00:21,061 INFO L93 Difference]: Finished difference Result 207 states and 244 transitions. [2024-09-13 10:00:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-13 10:00:21,062 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 14 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (12), 9 states have call predecessors, (12), 11 states have call successors, (12) Word has length 83 [2024-09-13 10:00:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:00:21,064 INFO L225 Difference]: With dead ends: 207 [2024-09-13 10:00:21,064 INFO L226 Difference]: Without dead ends: 205 [2024-09-13 10:00:21,065 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=274, Invalid=3148, Unknown=0, NotChecked=0, Total=3422 [2024-09-13 10:00:21,066 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 86 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-13 10:00:21,066 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 346 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1304 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2024-09-13 10:00:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-09-13 10:00:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 190. [2024-09-13 10:00:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 120 states have (on average 1.1) internal successors, (132), 125 states have internal predecessors, (132), 35 states have call successors, (35), 27 states have call predecessors, (35), 34 states have return successors, (59), 38 states have call predecessors, (59), 31 states have call successors, (59) [2024-09-13 10:00:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2024-09-13 10:00:21,176 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 83 [2024-09-13 10:00:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:00:21,176 INFO L474 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2024-09-13 10:00:21,176 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 14 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (12), 9 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-13 10:00:21,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2024-09-13 10:00:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-09-13 10:00:21,178 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:00:21,178 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:00:21,191 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 10:00:21,378 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 10:00:21,379 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:00:21,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:00:21,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1356764415, now seen corresponding path program 6 times [2024-09-13 10:00:21,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:00:21,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563936777] [2024-09-13 10:00:21,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:00:21,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:00:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:00:21,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593327101] [2024-09-13 10:00:21,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 10:00:21,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:00:21,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:00:21,470 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:00:21,474 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 10:00:22,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-09-13 10:00:22,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:00:22,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 294 conjuncts are in the unsatisfiable core [2024-09-13 10:00:22,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:00:22,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:00:22,989 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 11 treesize of output 7 [2024-09-13 10:00:22,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 10:00:23,016 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 13 treesize of output 9 [2024-09-13 10:00:24,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:00:24,780 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 31 treesize of output 19 [2024-09-13 10:00:25,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-13 10:00:25,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 10:00:25,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2024-09-13 10:00:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 111 proven. 172 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2024-09-13 10:00:25,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:00:32,145 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 20 treesize of output 16 [2024-09-13 10:00:32,151 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 16 treesize of output 12 [2024-09-13 10:02:07,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:02:07,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563936777] [2024-09-13 10:02:07,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:02:07,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593327101] [2024-09-13 10:02:07,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593327101] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:02:07,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:02:07,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-13 10:02:07,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506410096] [2024-09-13 10:02:07,663 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:02:07,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 10:02:07,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:02:07,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 10:02:07,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1256, Unknown=23, NotChecked=0, Total=1406 [2024-09-13 10:02:07,665 INFO L87 Difference]: Start difference. First operand 190 states and 226 transitions. Second operand has 28 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 24 states have internal predecessors, (41), 11 states have call successors, (15), 6 states have call predecessors, (15), 12 states have return successors, (17), 13 states have call predecessors, (17), 9 states have call successors, (17) [2024-09-13 10:02:11,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 10:02:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:02:27,597 INFO L93 Difference]: Finished difference Result 228 states and 268 transitions. [2024-09-13 10:02:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 10:02:27,598 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 24 states have internal predecessors, (41), 11 states have call successors, (15), 6 states have call predecessors, (15), 12 states have return successors, (17), 13 states have call predecessors, (17), 9 states have call successors, (17) Word has length 192 [2024-09-13 10:02:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:02:27,599 INFO L225 Difference]: With dead ends: 228 [2024-09-13 10:02:27,599 INFO L226 Difference]: Without dead ends: 224 [2024-09-13 10:02:27,600 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 112.9s TimeCoverageRelationStatistics Valid=236, Invalid=2090, Unknown=26, NotChecked=0, Total=2352 [2024-09-13 10:02:27,600 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 44 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-09-13 10:02:27,600 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 544 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1628 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2024-09-13 10:02:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-09-13 10:02:27,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 194. [2024-09-13 10:02:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 122 states have (on average 1.098360655737705) internal successors, (134), 127 states have internal predecessors, (134), 35 states have call successors, (35), 27 states have call predecessors, (35), 36 states have return successors, (63), 39 states have call predecessors, (63), 31 states have call successors, (63) [2024-09-13 10:02:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2024-09-13 10:02:27,695 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 192 [2024-09-13 10:02:27,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:02:27,695 INFO L474 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2024-09-13 10:02:27,695 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 24 states have internal predecessors, (41), 11 states have call successors, (15), 6 states have call predecessors, (15), 12 states have return successors, (17), 13 states have call predecessors, (17), 9 states have call successors, (17) [2024-09-13 10:02:27,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:02:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2024-09-13 10:02:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-13 10:02:27,697 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:02:27,697 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 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, 1] [2024-09-13 10:02:27,708 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 10:02:27,899 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 10:02:27,899 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:02:27,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:02:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1725790163, now seen corresponding path program 2 times [2024-09-13 10:02:27,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:02:27,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838192611] [2024-09-13 10:02:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:02:27,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:02:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:02:27,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608756278] [2024-09-13 10:02:27,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:02:27,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:02:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:02:27,961 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:02:27,962 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 10:02:28,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:02:28,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:02:28,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 219 conjuncts are in the unsatisfiable core [2024-09-13 10:02:28,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:02:28,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:02:28,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:02:28,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 10:02:28,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:02:28,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 10:02:28,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 10:02:28,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-13 10:02:29,946 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 31 treesize of output 19 [2024-09-13 10:02:29,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:02:31,091 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 100 treesize of output 57 [2024-09-13 10:02:31,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 10:02:31,238 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 39 treesize of output 31 [2024-09-13 10:02:31,292 INFO L349 Elim1Store]: treesize reduction 26, result has 51.9 percent of original size [2024-09-13 10:02:31,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 63 [2024-09-13 10:02:31,365 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-13 10:02:31,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-13 10:02:31,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 10:02:31,788 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 112 treesize of output 164 [2024-09-13 10:02:31,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 10:02:31,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 180 treesize of output 252 [2024-09-13 10:02:31,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 10:02:31,907 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 113 treesize of output 97 [2024-09-13 10:02:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 82 proven. 63 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2024-09-13 10:02:32,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:02:35,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:02:35,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838192611] [2024-09-13 10:02:35,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:02:35,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608756278] [2024-09-13 10:02:35,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608756278] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:02:35,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:02:35,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-13 10:02:35,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374007384] [2024-09-13 10:02:35,098 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:02:35,099 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-13 10:02:35,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:02:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-13 10:02:35,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 10:02:35,101 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand has 27 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 12 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-13 10:02:39,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:02:39,943 INFO L93 Difference]: Finished difference Result 250 states and 302 transitions. [2024-09-13 10:02:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-13 10:02:39,944 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 12 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) Word has length 107 [2024-09-13 10:02:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:02:39,945 INFO L225 Difference]: With dead ends: 250 [2024-09-13 10:02:39,945 INFO L226 Difference]: Without dead ends: 248 [2024-09-13 10:02:39,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=197, Invalid=2059, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 10:02:39,946 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 71 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:02:39,946 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 536 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1503 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2024-09-13 10:02:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-09-13 10:02:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2024-09-13 10:02:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 122 states have (on average 1.098360655737705) internal successors, (134), 127 states have internal predecessors, (134), 35 states have call successors, (35), 27 states have call predecessors, (35), 36 states have return successors, (63), 39 states have call predecessors, (63), 31 states have call successors, (63) [2024-09-13 10:02:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2024-09-13 10:02:40,076 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 107 [2024-09-13 10:02:40,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:02:40,076 INFO L474 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2024-09-13 10:02:40,076 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 12 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-13 10:02:40,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:02:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2024-09-13 10:02:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-13 10:02:40,077 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:02:40,077 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:02:40,095 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-13 10:02:40,278 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 10:02:40,278 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:02:40,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:02:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash -986625217, now seen corresponding path program 1 times [2024-09-13 10:02:40,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:02:40,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590230136] [2024-09-13 10:02:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:02:40,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:02:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:40,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 10:02:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:40,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:02:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:40,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:02:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:41,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:02:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:41,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 10:02:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:41,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 10:02:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:41,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 10:02:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:41,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:02:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:41,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 10:02:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:41,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 10:02:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:41,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-13 10:02:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:41,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 10:02:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:41,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-13 10:02:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-13 10:02:41,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:02:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590230136] [2024-09-13 10:02:41,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590230136] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:02:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161262834] [2024-09-13 10:02:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:02:41,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:02:41,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:02:41,407 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:02:41,408 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 10:02:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:02:41,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-13 10:02:41,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:02:41,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-13 10:02:41,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 10:02:41,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2024-09-13 10:02:41,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-13 10:02:43,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 10:02:43,126 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 55 treesize of output 43 [2024-09-13 10:02:43,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 48 [2024-09-13 10:02:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 109 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 10:02:43,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:02:43,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-13 10:02:45,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161262834] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:02:45,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 10:02:45,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2024-09-13 10:02:45,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882674661] [2024-09-13 10:02:45,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 10:02:45,996 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-13 10:02:45,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:02:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-13 10:02:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2024-09-13 10:02:45,997 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand has 31 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 25 states have internal predecessors, (64), 15 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2024-09-13 10:02:50,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]