./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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d 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 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:15:55,056 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:15:55,110 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:15:55,115 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:15:55,115 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:15:55,149 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:15:55,150 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:15:55,150 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:15:55,151 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:15:55,152 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:15:55,164 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:15:55,164 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:15:55,165 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:15:55,167 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:15:55,167 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:15:55,168 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:15:55,168 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:15:55,168 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:15:55,168 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:15:55,168 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:15:55,168 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:15:55,169 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:15:55,169 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:15:55,169 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:15:55,169 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:15:55,169 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:15:55,169 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:15:55,169 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:15:55,170 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:15:55,170 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:15:55,170 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:15:55,170 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:15:55,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:15:55,170 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:15:55,170 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:15:55,171 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:15:55,171 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:15:55,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:15:55,171 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:15:55,171 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:15:55,171 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:15:55,173 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:15:55,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 13:15:55,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:15:55,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:15:55,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:15:55,387 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:15:55,388 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:15:55,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-09-20 13:15:56,595 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:15:56,730 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:15:56,731 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-09-20 13:15:56,739 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/45e7e3e3a/e132486eca0d43de8ae3802cacb8d37a/FLAG8a709103a [2024-09-20 13:15:56,753 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/45e7e3e3a/e132486eca0d43de8ae3802cacb8d37a [2024-09-20 13:15:56,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:15:56,757 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 13:15:56,759 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:15:56,759 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:15:56,763 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:15:56,764 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:56,765 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78eb153d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56, skipping insertion in model container [2024-09-20 13:15:56,766 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:56,785 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:15:56,910 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c[1083,1096] [2024-09-20 13:15:56,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:15:56,936 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 13:15:56,946 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c[1083,1096] [2024-09-20 13:15:56,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:15:56,977 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:15:56,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56 WrapperNode [2024-09-20 13:15:56,978 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:15:56,979 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:15:56,979 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:15:56,980 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:15:56,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:56,990 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:56,996 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 13:15:56,996 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:15:56,997 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:15:56,997 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:15:56,997 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:15:57,005 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:57,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:57,007 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:57,026 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 12, 5, 6, 9, 7, 8]. 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, 3, 1, 2]. [2024-09-20 13:15:57,026 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:57,026 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:57,032 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:57,033 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:57,034 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:57,035 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:57,041 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:15:57,041 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:15:57,042 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:15:57,042 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:15:57,042 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (1/1) ... [2024-09-20 13:15:57,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:15:57,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:15:57,074 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) [2024-09-20 13:15:57,075 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 [2024-09-20 13:15:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:15:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 13:15:57,106 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 13:15:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 13:15:57,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 13:15:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 13:15:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 13:15:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 13:15:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 13:15:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 13:15:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 13:15:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-20 13:15:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_51_0 [2024-09-20 13:15:57,107 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_51_0 [2024-09-20 13:15:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 13:15:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_38_0 [2024-09-20 13:15:57,107 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_38_0 [2024-09-20 13:15:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 13:15:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 13:15:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 13:15:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 13:15:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 13:15:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 13:15:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-20 13:15:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 13:15:57,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 13:15:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:15:57,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:15:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 13:15:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 13:15:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 13:15:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 13:15:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 13:15:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 13:15:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-20 13:15:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 13:15:57,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 13:15:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 13:15:57,214 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:15:57,219 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:15:57,418 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-20 13:15:57,419 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:15:57,439 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:15:57,441 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 13:15:57,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:15:57 BoogieIcfgContainer [2024-09-20 13:15:57,442 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:15:57,443 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:15:57,444 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:15:57,446 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:15:57,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:15:56" (1/3) ... [2024-09-20 13:15:57,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2816470c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:15:57, skipping insertion in model container [2024-09-20 13:15:57,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:15:56" (2/3) ... [2024-09-20 13:15:57,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2816470c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:15:57, skipping insertion in model container [2024-09-20 13:15:57,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:15:57" (3/3) ... [2024-09-20 13:15:57,449 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard-ll.c [2024-09-20 13:15:57,463 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:15:57,463 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 13:15:57,501 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:15:57,506 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;@6c8afeb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:15:57,506 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 13:15:57,510 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) [2024-09-20 13:15:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 13:15:57,516 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:57,516 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:15:57,517 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:57,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash -261209268, now seen corresponding path program 1 times [2024-09-20 13:15:57,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:57,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604346620] [2024-09-20 13:15:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:57,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:58,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:15:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:58,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:15:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:15:58,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:15:58,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604346620] [2024-09-20 13:15:58,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604346620] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:15:58,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:15:58,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 13:15:58,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379362817] [2024-09-20 13:15:58,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:15:58,026 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:15:58,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:15:58,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:15:58,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 13:15:58,046 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) [2024-09-20 13:15:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:15:58,222 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2024-09-20 13:15:58,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:15:58,225 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 [2024-09-20 13:15:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:15:58,231 INFO L225 Difference]: With dead ends: 96 [2024-09-20 13:15:58,232 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 13:15:58,236 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 [2024-09-20 13:15:58,238 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 [2024-09-20 13:15:58,238 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] [2024-09-20 13:15:58,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 13:15:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-20 13:15:58,269 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) [2024-09-20 13:15:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-09-20 13:15:58,274 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 18 [2024-09-20 13:15:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:15:58,274 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-09-20 13:15:58,275 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) [2024-09-20 13:15:58,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-09-20 13:15:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 13:15:58,276 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:58,277 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] [2024-09-20 13:15:58,277 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:15:58,277 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:58,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash 249081250, now seen corresponding path program 1 times [2024-09-20 13:15:58,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:58,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713804738] [2024-09-20 13:15:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:58,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:58,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:15:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:58,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:15:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:58,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:15:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:15:58,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:15:58,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713804738] [2024-09-20 13:15:58,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713804738] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:15:58,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:15:58,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 13:15:58,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250428721] [2024-09-20 13:15:58,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:15:58,665 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:15:58,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:15:58,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:15:58,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 13:15:58,667 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) [2024-09-20 13:15:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:15:58,850 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2024-09-20 13:15:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:15:58,850 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 [2024-09-20 13:15:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:15:58,852 INFO L225 Difference]: With dead ends: 56 [2024-09-20 13:15:58,852 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 13:15:58,853 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 [2024-09-20 13:15:58,854 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 [2024-09-20 13:15:58,855 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] [2024-09-20 13:15:58,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 13:15:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-20 13:15:58,867 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) [2024-09-20 13:15:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-09-20 13:15:58,870 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 24 [2024-09-20 13:15:58,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:15:58,870 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-09-20 13:15:58,870 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) [2024-09-20 13:15:58,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-09-20 13:15:58,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 13:15:58,871 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:58,871 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] [2024-09-20 13:15:58,871 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 13:15:58,871 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:58,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:58,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1395279990, now seen corresponding path program 1 times [2024-09-20 13:15:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:58,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055086587] [2024-09-20 13:15:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:58,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:15:58,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631304641] [2024-09-20 13:15:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:58,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:58,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:15:58,914 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) [2024-09-20 13:15:58,916 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:15:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:59,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 13:15:59,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:15:59,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:15:59,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:15:59,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:15:59,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-20 13:15:59,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:15:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:15:59,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:15:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:15:59,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:15:59,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055086587] [2024-09-20 13:15:59,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:15:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631304641] [2024-09-20 13:15:59,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631304641] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 13:15:59,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:15:59,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-20 13:15:59,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557953772] [2024-09-20 13:15:59,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:15:59,471 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:15:59,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:15:59,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:15:59,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:15:59,472 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) [2024-09-20 13:15:59,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:15:59,673 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2024-09-20 13:15:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 13:15:59,674 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 [2024-09-20 13:15:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:15:59,676 INFO L225 Difference]: With dead ends: 65 [2024-09-20 13:15:59,678 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 13:15:59,678 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 [2024-09-20 13:15:59,679 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:15:59,680 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 271 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:15:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 13:15:59,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2024-09-20 13:15:59,697 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) [2024-09-20 13:15:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2024-09-20 13:15:59,701 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 30 [2024-09-20 13:15:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:15:59,701 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2024-09-20 13:15:59,701 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) [2024-09-20 13:15:59,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2024-09-20 13:15:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 13:15:59,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:59,703 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] [2024-09-20 13:15:59,726 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 13:15:59,904 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 [2024-09-20 13:15:59,905 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:59,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash -127824258, now seen corresponding path program 1 times [2024-09-20 13:15:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:59,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237601117] [2024-09-20 13:15:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:59,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:15:59,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026271789] [2024-09-20 13:15:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:59,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:59,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:15:59,950 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) [2024-09-20 13:15:59,951 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:16:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:00,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-20 13:16:00,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:16:00,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:16:00,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:00,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:00,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:00,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:16:00,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:16:00,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-20 13:16:00,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:16:00,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:00,679 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 34 treesize of output 34 [2024-09-20 13:16:00,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:00,691 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 58 treesize of output 46 [2024-09-20 13:16:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:16:00,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:01,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:01,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237601117] [2024-09-20 13:16:01,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:01,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026271789] [2024-09-20 13:16:01,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026271789] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:01,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:01,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-20 13:16:01,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521547866] [2024-09-20 13:16:01,241 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:01,241 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 13:16:01,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:01,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 13:16:01,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:16:01,243 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 15 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 13:16:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:02,234 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2024-09-20 13:16:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 13:16:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2024-09-20 13:16:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:02,237 INFO L225 Difference]: With dead ends: 104 [2024-09-20 13:16:02,238 INFO L226 Difference]: Without dead ends: 102 [2024-09-20 13:16:02,238 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2024-09-20 13:16:02,239 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:02,240 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 244 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 13:16:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-20 13:16:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2024-09-20 13:16:02,265 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) [2024-09-20 13:16:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2024-09-20 13:16:02,266 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 42 [2024-09-20 13:16:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:02,266 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2024-09-20 13:16:02,266 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 13:16:02,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2024-09-20 13:16:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 13:16:02,267 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:02,267 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] [2024-09-20 13:16:02,287 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 13:16:02,468 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 [2024-09-20 13:16:02,468 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:02,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:02,469 INFO L85 PathProgramCache]: Analyzing trace with hash -782540599, now seen corresponding path program 1 times [2024-09-20 13:16:02,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:02,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664668257] [2024-09-20 13:16:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:02,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:16:02,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851585410] [2024-09-20 13:16:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:02,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:02,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:16:02,503 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) [2024-09-20 13:16:02,505 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:16:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:02,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-09-20 13:16:02,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:16:02,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:02,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:02,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:02,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:16:02,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:02,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:16:03,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:03,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2024-09-20 13:16:07,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:16:07,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-20 13:16:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:16:07,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:07,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:07,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664668257] [2024-09-20 13:16:07,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:07,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851585410] [2024-09-20 13:16:07,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851585410] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:07,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:07,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-20 13:16:07,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779563159] [2024-09-20 13:16:07,989 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:07,990 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 13:16:07,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:07,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 13:16:07,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=476, Unknown=1, NotChecked=0, Total=552 [2024-09-20 13:16:07,990 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-20 13:16:12,782 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] [2024-09-20 13:16:17,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:21,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:21,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:21,051 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2024-09-20 13:16:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 13:16:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2024-09-20 13:16:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:21,053 INFO L225 Difference]: With dead ends: 130 [2024-09-20 13:16:21,053 INFO L226 Difference]: Without dead ends: 128 [2024-09-20 13:16:21,053 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=176, Invalid=1013, Unknown=1, NotChecked=0, Total=1190 [2024-09-20 13:16:21,054 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 79 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 43 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:21,054 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 251 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 539 Invalid, 5 Unknown, 0 Unchecked, 12.6s Time] [2024-09-20 13:16:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-09-20 13:16:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2024-09-20 13:16:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 82 states have internal predecessors, (88), 27 states have call successors, (27), 17 states have call predecessors, (27), 19 states have return successors, (35), 25 states have call predecessors, (35), 23 states have call successors, (35) [2024-09-20 13:16:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 150 transitions. [2024-09-20 13:16:21,080 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 150 transitions. Word has length 48 [2024-09-20 13:16:21,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:21,081 INFO L474 AbstractCegarLoop]: Abstraction has 124 states and 150 transitions. [2024-09-20 13:16:21,081 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-20 13:16:21,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:21,081 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 150 transitions. [2024-09-20 13:16:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-20 13:16:21,085 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:21,085 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] [2024-09-20 13:16:21,091 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 13:16:21,285 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 [2024-09-20 13:16:21,286 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:21,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash 46413415, now seen corresponding path program 1 times [2024-09-20 13:16:21,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:21,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898544237] [2024-09-20 13:16:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:21,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:16:21,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453192201] [2024-09-20 13:16:21,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:21,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:21,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:16:21,365 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) [2024-09-20 13:16:21,366 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:16:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:21,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-20 13:16:21,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:16:21,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:21,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:21,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:22,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:16:22,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 13:16:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 13:16:22,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 13:16:22,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:22,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898544237] [2024-09-20 13:16:22,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:22,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453192201] [2024-09-20 13:16:22,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453192201] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:16:22,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:16:22,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2024-09-20 13:16:22,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213515195] [2024-09-20 13:16:22,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:22,580 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 13:16:22,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:22,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 13:16:22,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:16:22,580 INFO L87 Difference]: Start difference. First operand 124 states and 150 transitions. Second operand has 20 states, 15 states have (on average 3.466666666666667) internal successors, (52), 18 states have internal predecessors, (52), 11 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 13:16:23,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:23,269 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2024-09-20 13:16:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 13:16:23,270 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 3.466666666666667) internal successors, (52), 18 states have internal predecessors, (52), 11 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) Word has length 66 [2024-09-20 13:16:23,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:23,271 INFO L225 Difference]: With dead ends: 135 [2024-09-20 13:16:23,272 INFO L226 Difference]: Without dead ends: 133 [2024-09-20 13:16:23,272 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 109 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2024-09-20 13:16:23,272 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:23,272 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 310 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 13:16:23,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-20 13:16:23,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2024-09-20 13:16:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 86 states have internal predecessors, (92), 27 states have call successors, (27), 18 states have call predecessors, (27), 21 states have return successors, (37), 26 states have call predecessors, (37), 23 states have call successors, (37) [2024-09-20 13:16:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 156 transitions. [2024-09-20 13:16:23,317 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 156 transitions. Word has length 66 [2024-09-20 13:16:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:23,317 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 156 transitions. [2024-09-20 13:16:23,321 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 3.466666666666667) internal successors, (52), 18 states have internal predecessors, (52), 11 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 13:16:23,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 156 transitions. [2024-09-20 13:16:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 13:16:23,323 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:23,323 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] [2024-09-20 13:16:23,369 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 13:16:23,523 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 [2024-09-20 13:16:23,524 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:23,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:23,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1885035655, now seen corresponding path program 1 times [2024-09-20 13:16:23,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:23,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353831530] [2024-09-20 13:16:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:23,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:16:23,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606422129] [2024-09-20 13:16:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:23,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:23,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:16:23,550 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) [2024-09-20 13:16:23,551 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:16:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:23,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-20 13:16:23,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:16:23,667 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 [2024-09-20 13:16:23,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:23,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:23,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:23,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 13:16:24,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-20 13:16:24,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 13:16:24,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 13:16:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 13:16:24,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:32,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:32,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353831530] [2024-09-20 13:16:32,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:32,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606422129] [2024-09-20 13:16:32,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606422129] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:32,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:32,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-20 13:16:32,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259664709] [2024-09-20 13:16:32,263 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:32,264 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 13:16:32,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:32,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 13:16:32,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=125, Unknown=1, NotChecked=0, Total=156 [2024-09-20 13:16:32,265 INFO L87 Difference]: Start difference. First operand 130 states and 156 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 13:16:32,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:32,732 INFO L93 Difference]: Finished difference Result 147 states and 172 transitions. [2024-09-20 13:16:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 13:16:32,732 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2024-09-20 13:16:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:32,733 INFO L225 Difference]: With dead ends: 147 [2024-09-20 13:16:32,733 INFO L226 Difference]: Without dead ends: 143 [2024-09-20 13:16:32,734 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=67, Invalid=238, Unknown=1, NotChecked=0, Total=306 [2024-09-20 13:16:32,734 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:32,734 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 103 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 319 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 13:16:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-20 13:16:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2024-09-20 13:16:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 92 states have internal predecessors, (98), 28 states have call successors, (28), 20 states have call predecessors, (28), 23 states have return successors, (39), 27 states have call predecessors, (39), 24 states have call successors, (39) [2024-09-20 13:16:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2024-09-20 13:16:32,771 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 58 [2024-09-20 13:16:32,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:32,771 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2024-09-20 13:16:32,771 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 13:16:32,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2024-09-20 13:16:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-20 13:16:32,772 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:32,772 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] [2024-09-20 13:16:32,786 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 13:16:32,975 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 13:16:32,976 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:32,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1428903809, now seen corresponding path program 1 times [2024-09-20 13:16:32,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:32,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256077543] [2024-09-20 13:16:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:32,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:33,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:16:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:33,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:16:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:33,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:16:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:33,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:16:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:33,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 13:16:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:33,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:16:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:33,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 13:16:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:33,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 13:16:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 13:16:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256077543] [2024-09-20 13:16:33,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256077543] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:16:33,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:16:33,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 13:16:33,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84066985] [2024-09-20 13:16:33,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:16:33,252 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:16:33,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:33,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:16:33,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-20 13:16:33,253 INFO L87 Difference]: Start difference. First operand 140 states and 165 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) [2024-09-20 13:16:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:33,494 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2024-09-20 13:16:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:16:33,494 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 [2024-09-20 13:16:33,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:33,497 INFO L225 Difference]: With dead ends: 173 [2024-09-20 13:16:33,498 INFO L226 Difference]: Without dead ends: 123 [2024-09-20 13:16:33,499 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:16:33,499 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:33,499 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 110 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:16:33,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-20 13:16:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2024-09-20 13:16:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 79 states have internal predecessors, (83), 25 states have call successors, (25), 18 states have call predecessors, (25), 19 states have return successors, (28), 23 states have call predecessors, (28), 21 states have call successors, (28) [2024-09-20 13:16:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2024-09-20 13:16:33,532 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 59 [2024-09-20 13:16:33,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:33,533 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2024-09-20 13:16:33,533 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) [2024-09-20 13:16:33,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2024-09-20 13:16:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-20 13:16:33,534 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:33,534 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] [2024-09-20 13:16:33,534 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-20 13:16:33,534 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:33,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:33,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1617999346, now seen corresponding path program 1 times [2024-09-20 13:16:33,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:33,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109646155] [2024-09-20 13:16:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:33,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:16:33,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714515330] [2024-09-20 13:16:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:33,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:33,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:16:33,588 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) [2024-09-20 13:16:33,589 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 13:16:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:33,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-20 13:16:33,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:16:33,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:33,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:33,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:16:33,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:33,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:33,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 13:16:34,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:16:34,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:34,611 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 41 [2024-09-20 13:16:34,616 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 [2024-09-20 13:16:34,630 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 [2024-09-20 13:16:34,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 26 [2024-09-20 13:16:34,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-20 13:16:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-20 13:16:34,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:35,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:35,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109646155] [2024-09-20 13:16:35,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:35,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714515330] [2024-09-20 13:16:35,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714515330] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:35,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:35,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-20 13:16:35,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870531346] [2024-09-20 13:16:35,757 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:35,757 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 13:16:35,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:35,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 13:16:35,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2024-09-20 13:16:35,758 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand has 19 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2024-09-20 13:16:40,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:45,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:49,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:49,259 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2024-09-20 13:16:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 13:16:49,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 [2024-09-20 13:16:49,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:49,260 INFO L225 Difference]: With dead ends: 159 [2024-09-20 13:16:49,260 INFO L226 Difference]: Without dead ends: 155 [2024-09-20 13:16:49,261 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 13:16:49,261 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 56 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 35 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:49,261 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 329 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 834 Invalid, 5 Unknown, 0 Unchecked, 13.0s Time] [2024-09-20 13:16:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-20 13:16:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2024-09-20 13:16:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 92 states have internal predecessors, (97), 28 states have call successors, (28), 21 states have call predecessors, (28), 23 states have return successors, (35), 27 states have call predecessors, (35), 24 states have call successors, (35) [2024-09-20 13:16:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2024-09-20 13:16:49,300 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 72 [2024-09-20 13:16:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:49,300 INFO L474 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2024-09-20 13:16:49,300 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2024-09-20 13:16:49,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2024-09-20 13:16:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-20 13:16:49,302 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:49,302 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] [2024-09-20 13:16:49,309 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 13:16:49,502 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:49,503 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:49,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:49,503 INFO L85 PathProgramCache]: Analyzing trace with hash -851672613, now seen corresponding path program 2 times [2024-09-20 13:16:49,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:49,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673995097] [2024-09-20 13:16:49,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:49,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:16:49,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258628905] [2024-09-20 13:16:49,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:16:49,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:49,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:16:49,559 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) [2024-09-20 13:16:49,560 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 13:16:49,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:16:49,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:16:49,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-20 13:16:49,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:16:49,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:16:49,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:49,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:16:49,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:16:50,161 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 [2024-09-20 13:16:50,170 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 [2024-09-20 13:16:50,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 13:16:50,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:16:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 54 proven. 25 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-20 13:16:50,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:51,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:51,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673995097] [2024-09-20 13:16:51,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:51,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258628905] [2024-09-20 13:16:51,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258628905] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:51,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:51,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-20 13:16:51,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102198504] [2024-09-20 13:16:51,119 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:51,119 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 13:16:51,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:51,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 13:16:51,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-09-20 13:16:51,120 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 17 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-20 13:16:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:52,094 INFO L93 Difference]: Finished difference Result 180 states and 203 transitions. [2024-09-20 13:16:52,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 13:16:52,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 96 [2024-09-20 13:16:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:52,096 INFO L225 Difference]: With dead ends: 180 [2024-09-20 13:16:52,096 INFO L226 Difference]: Without dead ends: 176 [2024-09-20 13:16:52,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 13:16:52,097 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 27 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:52,097 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 286 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 801 Invalid, 2 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 13:16:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-09-20 13:16:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2024-09-20 13:16:52,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 93 states have internal predecessors, (98), 28 states have call successors, (28), 21 states have call predecessors, (28), 24 states have return successors, (37), 28 states have call predecessors, (37), 24 states have call successors, (37) [2024-09-20 13:16:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 163 transitions. [2024-09-20 13:16:52,138 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 163 transitions. Word has length 96 [2024-09-20 13:16:52,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:52,138 INFO L474 AbstractCegarLoop]: Abstraction has 143 states and 163 transitions. [2024-09-20 13:16:52,138 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-20 13:16:52,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 163 transitions. [2024-09-20 13:16:52,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 13:16:52,139 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:52,139 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] [2024-09-20 13:16:52,152 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 13:16:52,343 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:52,344 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:52,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:52,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2096548347, now seen corresponding path program 1 times [2024-09-20 13:16:52,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:52,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248452490] [2024-09-20 13:16:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:52,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:52,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:16:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:52,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:16:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:52,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:16:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:52,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:16:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:52,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 13:16:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:52,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:16:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:52,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 13:16:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:52,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:16:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:52,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 13:16:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:53,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-20 13:16:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:16:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 13:16:53,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:53,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248452490] [2024-09-20 13:16:53,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248452490] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:16:53,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:16:53,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-20 13:16:53,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102022080] [2024-09-20 13:16:53,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:16:53,006 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 13:16:53,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:53,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 13:16:53,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:16:53,007 INFO L87 Difference]: Start difference. First operand 143 states and 163 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) [2024-09-20 13:16:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:53,565 INFO L93 Difference]: Finished difference Result 151 states and 171 transitions. [2024-09-20 13:16:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 13:16:53,566 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 [2024-09-20 13:16:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:53,568 INFO L225 Difference]: With dead ends: 151 [2024-09-20 13:16:53,568 INFO L226 Difference]: Without dead ends: 125 [2024-09-20 13:16:53,569 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 [2024-09-20 13:16:53,569 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:53,570 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 125 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 13:16:53,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-20 13:16:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-09-20 13:16:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 81 states have internal predecessors, (86), 25 states have call successors, (25), 18 states have call predecessors, (25), 21 states have return successors, (33), 25 states have call predecessors, (33), 21 states have call successors, (33) [2024-09-20 13:16:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2024-09-20 13:16:53,619 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 64 [2024-09-20 13:16:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:53,619 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2024-09-20 13:16:53,620 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) [2024-09-20 13:16:53,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2024-09-20 13:16:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-20 13:16:53,621 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:53,621 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] [2024-09-20 13:16:53,621 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-20 13:16:53,621 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:53,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:53,622 INFO L85 PathProgramCache]: Analyzing trace with hash 129307780, now seen corresponding path program 3 times [2024-09-20 13:16:53,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:53,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110814657] [2024-09-20 13:16:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:53,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:16:53,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792985957] [2024-09-20 13:16:53,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:16:53,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:53,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:16:53,699 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) [2024-09-20 13:16:53,710 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:16:53,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 13:16:53,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:16:53,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 143 conjuncts are in the unsatisfiable core [2024-09-20 13:16:53,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:16:53,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:16:54,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:54,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:54,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:16:54,507 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 [2024-09-20 13:16:54,512 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 [2024-09-20 13:16:54,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 13:16:54,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:16:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 72 proven. 40 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2024-09-20 13:16:54,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:55,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:55,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110814657] [2024-09-20 13:16:55,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:55,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792985957] [2024-09-20 13:16:55,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792985957] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:55,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:55,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-20 13:16:55,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052253038] [2024-09-20 13:16:55,732 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:55,732 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 13:16:55,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:55,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 13:16:55,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2024-09-20 13:16:55,733 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 17 states have internal predecessors, (35), 10 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-20 13:16:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:56,781 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2024-09-20 13:16:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 13:16:56,782 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 17 states have internal predecessors, (35), 10 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) Word has length 120 [2024-09-20 13:16:56,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:56,783 INFO L225 Difference]: With dead ends: 161 [2024-09-20 13:16:56,783 INFO L226 Difference]: Without dead ends: 157 [2024-09-20 13:16:56,783 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 13:16:56,784 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 39 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:56,784 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 365 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 921 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 13:16:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-20 13:16:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 127. [2024-09-20 13:16:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 82 states have internal predecessors, (87), 25 states have call successors, (25), 18 states have call predecessors, (25), 22 states have return successors, (35), 26 states have call predecessors, (35), 21 states have call successors, (35) [2024-09-20 13:16:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2024-09-20 13:16:56,825 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 120 [2024-09-20 13:16:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:56,827 INFO L474 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2024-09-20 13:16:56,827 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 17 states have internal predecessors, (35), 10 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-20 13:16:56,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2024-09-20 13:16:56,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-09-20 13:16:56,829 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:56,829 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] [2024-09-20 13:16:56,838 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 13:16:57,029 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 [2024-09-20 13:16:57,030 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:57,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:57,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2139308563, now seen corresponding path program 4 times [2024-09-20 13:16:57,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:57,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128445141] [2024-09-20 13:16:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:57,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:16:57,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238632859] [2024-09-20 13:16:57,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:16:57,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:57,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:16:57,102 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) [2024-09-20 13:16:57,104 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 13:16:57,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:16:57,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:16:57,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-09-20 13:16:57,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:16:57,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:16:57,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:57,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:16:57,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:16:57,947 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 [2024-09-20 13:16:57,957 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 [2024-09-20 13:16:58,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 13:16:58,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:16:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 90 proven. 57 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2024-09-20 13:16:58,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:59,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:59,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128445141] [2024-09-20 13:16:59,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:59,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238632859] [2024-09-20 13:16:59,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238632859] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:59,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:59,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-20 13:16:59,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468945637] [2024-09-20 13:16:59,516 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:59,516 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 13:16:59,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:59,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 13:16:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2024-09-20 13:16:59,517 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand has 18 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 10 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-20 13:17:00,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:17:00,557 INFO L93 Difference]: Finished difference Result 163 states and 186 transitions. [2024-09-20 13:17:00,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 13:17:00,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 10 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) Word has length 144 [2024-09-20 13:17:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:17:00,558 INFO L225 Difference]: With dead ends: 163 [2024-09-20 13:17:00,558 INFO L226 Difference]: Without dead ends: 159 [2024-09-20 13:17:00,559 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2024-09-20 13:17:00,559 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 43 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:17:00,559 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 308 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 13:17:00,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-20 13:17:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 129. [2024-09-20 13:17:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 80 states have (on average 1.1) internal successors, (88), 83 states have internal predecessors, (88), 25 states have call successors, (25), 18 states have call predecessors, (25), 23 states have return successors, (37), 27 states have call predecessors, (37), 21 states have call successors, (37) [2024-09-20 13:17:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2024-09-20 13:17:00,599 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 144 [2024-09-20 13:17:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:17:00,599 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2024-09-20 13:17:00,599 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 10 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-20 13:17:00,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:17:00,600 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2024-09-20 13:17:00,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-09-20 13:17:00,600 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:17:00,601 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] [2024-09-20 13:17:00,612 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 13:17:00,804 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 [2024-09-20 13:17:00,805 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:17:00,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:17:00,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1377710570, now seen corresponding path program 5 times [2024-09-20 13:17:00,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:17:00,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145913138] [2024-09-20 13:17:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:17:00,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:17:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:17:00,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769711256] [2024-09-20 13:17:00,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:17:00,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:17:00,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:17:00,877 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) [2024-09-20 13:17:00,878 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 13:17:01,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-20 13:17:01,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:17:01,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 213 conjuncts are in the unsatisfiable core [2024-09-20 13:17:01,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:17:01,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:17:01,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:17:01,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:17:01,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 13:17:02,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:17:02,196 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 [2024-09-20 13:17:02,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 13:17:02,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:17:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 110 proven. 178 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2024-09-20 13:17:02,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:17:04,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:17:04,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-20 13:17:17,971 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_31_to_38_0_#in~B.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_61| Int) (|v_func_to_recursive_line_31_to_38_0_#in~B.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_61| Int) (|v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_73| Int)) (let ((.cse2 (mod (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_38_0_#in~B.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_38_0_#in~B.offset_BEFORE_CALL_13|) 4294967296))) (or (= (select (select (store |c_#memory_int#1| c_func_to_recursive_line_31_to_38_0_~d.base (let ((.cse0 (select |c_#memory_int#1| c_func_to_recursive_line_31_to_38_0_~d.base))) (store .cse0 c_func_to_recursive_line_31_to_38_0_~d.offset (* 8 (select .cse0 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_73|) |v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_73|) (* (select (select (store |c_#memory_int#4| c_func_to_recursive_line_31_to_38_0_~p.base (let ((.cse1 (select |c_#memory_int#4| c_func_to_recursive_line_31_to_38_0_~p.base))) (store .cse1 c_func_to_recursive_line_31_to_38_0_~p.offset (* 8 (select .cse1 c_func_to_recursive_line_31_to_38_0_~p.offset))))) |v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_61|) |v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_61|) .cse2)) (not (= (* (select (select (store |c_old(#memory_int#4)| |c_func_to_recursive_line_31_to_38_0_#in~p.base| (let ((.cse3 (select |c_old(#memory_int#4)| |c_func_to_recursive_line_31_to_38_0_#in~p.base|))) (store .cse3 |c_func_to_recursive_line_31_to_38_0_#in~p.offset| (* (select .cse3 |c_func_to_recursive_line_31_to_38_0_#in~p.offset|) 16)))) |v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_61|) |v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_61|) .cse2) (select (select (store |c_old(#memory_int#1)| |c_func_to_recursive_line_31_to_38_0_#in~d.base| (let ((.cse4 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_31_to_38_0_#in~d.base|))) (store .cse4 |c_func_to_recursive_line_31_to_38_0_#in~d.offset| (* (select .cse4 |c_func_to_recursive_line_31_to_38_0_#in~d.offset|) 16)))) |v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_73|) |v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_73|)))))) is different from false [2024-09-20 13:17:18,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:17:18,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145913138] [2024-09-20 13:17:18,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:17:18,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769711256] [2024-09-20 13:17:18,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769711256] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:17:18,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:17:18,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-20 13:17:18,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864553613] [2024-09-20 13:17:18,003 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:17:18,003 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 13:17:18,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:17:18,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 13:17:18,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=892, Unknown=2, NotChecked=60, Total=1056 [2024-09-20 13:17:18,004 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 24 states, 18 states have (on average 2.611111111111111) internal successors, (47), 21 states have internal predecessors, (47), 13 states have call successors, (20), 5 states have call predecessors, (20), 9 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-20 13:17:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:17:19,401 INFO L93 Difference]: Finished difference Result 165 states and 189 transitions. [2024-09-20 13:17:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 13:17:19,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.611111111111111) internal successors, (47), 21 states have internal predecessors, (47), 13 states have call successors, (20), 5 states have call predecessors, (20), 9 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) Word has length 168 [2024-09-20 13:17:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:17:19,403 INFO L225 Difference]: With dead ends: 165 [2024-09-20 13:17:19,404 INFO L226 Difference]: Without dead ends: 161 [2024-09-20 13:17:19,404 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=197, Invalid=1611, Unknown=2, NotChecked=82, Total=1892 [2024-09-20 13:17:19,404 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 13:17:19,405 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 366 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1013 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 13:17:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-20 13:17:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 131. [2024-09-20 13:17:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 84 states have internal predecessors, (89), 25 states have call successors, (25), 18 states have call predecessors, (25), 24 states have return successors, (39), 28 states have call predecessors, (39), 21 states have call successors, (39) [2024-09-20 13:17:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2024-09-20 13:17:19,460 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 168 [2024-09-20 13:17:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:17:19,460 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2024-09-20 13:17:19,460 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.611111111111111) internal successors, (47), 21 states have internal predecessors, (47), 13 states have call successors, (20), 5 states have call predecessors, (20), 9 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-20 13:17:19,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:17:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2024-09-20 13:17:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-20 13:17:19,461 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:17:19,461 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] [2024-09-20 13:17:19,471 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 13:17:19,662 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 [2024-09-20 13:17:19,662 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:17:19,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:17:19,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2080657482, now seen corresponding path program 1 times [2024-09-20 13:17:19,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:17:19,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095434753] [2024-09-20 13:17:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:17:19,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:17:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:17:19,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964646526] [2024-09-20 13:17:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:17:19,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:17:19,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:17:19,717 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) [2024-09-20 13:17:19,717 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 13:17:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:17:19,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 210 conjuncts are in the unsatisfiable core [2024-09-20 13:17:19,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:17:19,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:17:19,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:17:19,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-20 13:17:19,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:17:19,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:17:19,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:17:19,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 13:17:20,758 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 [2024-09-20 13:17:20,775 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 [2024-09-20 13:17:21,656 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 [2024-09-20 13:17:21,673 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 [2024-09-20 13:17:21,819 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-20 13:17:21,819 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 [2024-09-20 13:17:21,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2024-09-20 13:17:21,887 INFO L349 Elim1Store]: treesize reduction 60, result has 47.8 percent of original size [2024-09-20 13:17:21,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 110 [2024-09-20 13:17:22,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:17:22,377 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 137 treesize of output 177 [2024-09-20 13:17:22,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2024-09-20 13:17:22,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:17:22,465 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 86 treesize of output 178 [2024-09-20 13:17:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-20 13:17:22,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:17:24,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:17:24,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095434753] [2024-09-20 13:17:24,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:17:24,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964646526] [2024-09-20 13:17:24,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964646526] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:17:24,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:17:24,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-20 13:17:24,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775733834] [2024-09-20 13:17:24,773 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:17:24,773 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 13:17:24,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:17:24,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 13:17:24,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 13:17:24,774 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 25 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 11 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 13:17:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:17:28,424 INFO L93 Difference]: Finished difference Result 185 states and 220 transitions. [2024-09-20 13:17:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 13:17:28,424 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 11 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) Word has length 83 [2024-09-20 13:17:28,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:17:28,426 INFO L225 Difference]: With dead ends: 185 [2024-09-20 13:17:28,427 INFO L226 Difference]: Without dead ends: 183 [2024-09-20 13:17:28,427 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=223, Invalid=2129, Unknown=0, NotChecked=0, Total=2352 [2024-09-20 13:17:28,427 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 70 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 32 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:17:28,428 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 381 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1247 Invalid, 4 Unknown, 0 Unchecked, 2.2s Time] [2024-09-20 13:17:28,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-09-20 13:17:28,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2024-09-20 13:17:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.1142857142857143) internal successors, (117), 109 states have internal predecessors, (117), 31 states have call successors, (31), 23 states have call predecessors, (31), 30 states have return successors, (50), 34 states have call predecessors, (50), 27 states have call successors, (50) [2024-09-20 13:17:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2024-09-20 13:17:28,515 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 83 [2024-09-20 13:17:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:17:28,516 INFO L474 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2024-09-20 13:17:28,516 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 11 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 13:17:28,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:17:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2024-09-20 13:17:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-09-20 13:17:28,517 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:17:28,517 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] [2024-09-20 13:17:28,531 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 13:17:28,717 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 [2024-09-20 13:17:28,717 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:17:28,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:17:28,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1356764415, now seen corresponding path program 6 times [2024-09-20 13:17:28,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:17:28,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521631368] [2024-09-20 13:17:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:17:28,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:17:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:17:28,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32499515] [2024-09-20 13:17:28,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 13:17:28,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:17:28,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:17:28,798 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) [2024-09-20 13:17:28,801 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 13:17:29,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-09-20 13:17:29,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:17:29,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 240 conjuncts are in the unsatisfiable core [2024-09-20 13:17:29,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:17:29,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:17:29,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:17:29,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:17:29,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 13:17:31,230 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 [2024-09-20 13:17:31,237 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 [2024-09-20 13:17:31,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 13:17:31,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:17:31,594 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 [2024-09-20 13:17:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 111 proven. 231 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked. [2024-09-20 13:17:31,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:17:37,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:17:37,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-20 13:18:42,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:18:42,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521631368] [2024-09-20 13:18:42,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:18:42,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32499515] [2024-09-20 13:18:42,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32499515] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:18:42,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:18:42,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2024-09-20 13:18:42,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894967352] [2024-09-20 13:18:42,010 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:18:42,010 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 13:18:42,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:18:42,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 13:18:42,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1331, Unknown=14, NotChecked=0, Total=1482 [2024-09-20 13:18:42,011 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand has 29 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (19), 6 states have call predecessors, (19), 12 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2024-09-20 13:18:46,075 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] [2024-09-20 13:18:49,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:18:49,512 INFO L93 Difference]: Finished difference Result 203 states and 237 transitions. [2024-09-20 13:18:49,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 13:18:49,513 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (19), 6 states have call predecessors, (19), 12 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) Word has length 192 [2024-09-20 13:18:49,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:18:49,514 INFO L225 Difference]: With dead ends: 203 [2024-09-20 13:18:49,514 INFO L226 Difference]: Without dead ends: 199 [2024-09-20 13:18:49,515 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 69.8s TimeCoverageRelationStatistics Valid=246, Invalid=2190, Unknown=14, NotChecked=0, Total=2450 [2024-09-20 13:18:49,515 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:18:49,515 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 503 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1479 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2024-09-20 13:18:49,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-20 13:18:49,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 169. [2024-09-20 13:18:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 110 states have internal predecessors, (118), 31 states have call successors, (31), 23 states have call predecessors, (31), 31 states have return successors, (52), 35 states have call predecessors, (52), 27 states have call successors, (52) [2024-09-20 13:18:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 201 transitions. [2024-09-20 13:18:49,595 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 201 transitions. Word has length 192 [2024-09-20 13:18:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:18:49,595 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 201 transitions. [2024-09-20 13:18:49,595 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (19), 6 states have call predecessors, (19), 12 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2024-09-20 13:18:49,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:18:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 201 transitions. [2024-09-20 13:18:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-20 13:18:49,596 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:18:49,596 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] [2024-09-20 13:18:49,608 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 13:18:49,796 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 [2024-09-20 13:18:49,797 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:18:49,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:18:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1725790163, now seen corresponding path program 2 times [2024-09-20 13:18:49,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:18:49,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502625301] [2024-09-20 13:18:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:18:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:18:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:18:49,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205750307] [2024-09-20 13:18:49,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:18:49,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:18:49,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:18:49,852 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) [2024-09-20 13:18:49,853 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 13:18:50,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:18:50,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:18:50,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 214 conjuncts are in the unsatisfiable core [2024-09-20 13:18:50,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:18:50,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:18:50,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:18:50,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:18:50,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:18:50,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:18:50,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:18:50,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:18:51,763 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 [2024-09-20 13:18:51,772 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 [2024-09-20 13:18:52,780 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 19 treesize of output 11 [2024-09-20 13:18:52,793 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 [2024-09-20 13:18:52,938 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-20 13:18:52,939 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 50 treesize of output 59 [2024-09-20 13:18:52,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2024-09-20 13:18:53,032 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-20 13:18:53,033 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 [2024-09-20 13:18:53,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:18:53,407 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 49 treesize of output 45 [2024-09-20 13:18:53,475 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:18:53,475 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 108 treesize of output 160 [2024-09-20 13:18:53,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:18:53,572 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 164 treesize of output 236 [2024-09-20 13:18:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-09-20 13:18:53,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:19:02,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:19:02,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502625301] [2024-09-20 13:19:02,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:19:02,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205750307] [2024-09-20 13:19:02,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205750307] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:19:02,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:19:02,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-20 13:19:02,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213878903] [2024-09-20 13:19:02,496 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:19:02,496 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 13:19:02,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:19:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 13:19:02,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1019, Unknown=1, NotChecked=0, Total=1122 [2024-09-20 13:19:02,497 INFO L87 Difference]: Start difference. First operand 169 states and 201 transitions. Second operand has 24 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-20 13:19:06,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:19:06,494 INFO L93 Difference]: Finished difference Result 223 states and 268 transitions. [2024-09-20 13:19:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 13:19:06,494 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 107 [2024-09-20 13:19:06,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:19:06,496 INFO L225 Difference]: With dead ends: 223 [2024-09-20 13:19:06,496 INFO L226 Difference]: Without dead ends: 221 [2024-09-20 13:19:06,496 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=166, Invalid=1639, Unknown=1, NotChecked=0, Total=1806 [2024-09-20 13:19:06,497 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 72 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 41 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:19:06,497 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 449 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1242 Invalid, 3 Unknown, 0 Unchecked, 2.5s Time] [2024-09-20 13:19:06,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-09-20 13:19:06,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 169. [2024-09-20 13:19:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 110 states have internal predecessors, (118), 31 states have call successors, (31), 23 states have call predecessors, (31), 31 states have return successors, (52), 35 states have call predecessors, (52), 27 states have call successors, (52) [2024-09-20 13:19:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 201 transitions. [2024-09-20 13:19:06,602 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 201 transitions. Word has length 107 [2024-09-20 13:19:06,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:19:06,602 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 201 transitions. [2024-09-20 13:19:06,602 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-20 13:19:06,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:19:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 201 transitions. [2024-09-20 13:19:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-20 13:19:06,603 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:19:06,603 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] [2024-09-20 13:19:06,611 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-20 13:19:06,803 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 [2024-09-20 13:19:06,804 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:19:06,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:19:06,804 INFO L85 PathProgramCache]: Analyzing trace with hash -986625217, now seen corresponding path program 1 times [2024-09-20 13:19:06,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:19:06,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286466477] [2024-09-20 13:19:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:19:06,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:19:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:19:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:19:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:19:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:19:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 13:19:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:19:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 13:19:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:19:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 13:19:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:19:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-20 13:19:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:19:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-20 13:19:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-20 13:19:07,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:19:07,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286466477] [2024-09-20 13:19:07,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286466477] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:19:07,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980806287] [2024-09-20 13:19:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:19:07,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:19:07,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:19:07,940 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) [2024-09-20 13:19:07,941 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 13:19:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:08,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-20 13:19:08,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:19:08,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-20 13:19:08,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-20 13:19:08,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-09-20 13:19:08,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:19:09,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:19:09,747 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 [2024-09-20 13:19:09,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 25 [2024-09-20 13:19:09,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 13:19:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 109 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 13:19:09,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:19:12,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980806287] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:19:12,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:19:12,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2024-09-20 13:19:12,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307363944] [2024-09-20 13:19:12,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:19:12,206 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 13:19:12,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:19:12,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 13:19:12,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 13:19:12,207 INFO L87 Difference]: Start difference. First operand 169 states and 201 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) [2024-09-20 13:19:17,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:19:21,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:19:25,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:19:29,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:19:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:19:29,924 INFO L93 Difference]: Finished difference Result 214 states and 254 transitions. [2024-09-20 13:19:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 13:19:29,924 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 89 [2024-09-20 13:19:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:19:29,925 INFO L225 Difference]: With dead ends: 214 [2024-09-20 13:19:29,925 INFO L226 Difference]: Without dead ends: 166 [2024-09-20 13:19:29,926 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 13:19:29,926 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 43 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:19:29,927 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 206 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 738 Invalid, 5 Unknown, 0 Unchecked, 17.0s Time] [2024-09-20 13:19:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-20 13:19:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2024-09-20 13:19:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 104 states have (on average 1.0961538461538463) internal successors, (114), 107 states have internal predecessors, (114), 29 states have call successors, (29), 23 states have call predecessors, (29), 30 states have return successors, (45), 33 states have call predecessors, (45), 25 states have call successors, (45) [2024-09-20 13:19:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2024-09-20 13:19:30,030 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 89 [2024-09-20 13:19:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:19:30,030 INFO L474 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2024-09-20 13:19:30,030 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-09-20 13:19:30,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:19:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2024-09-20 13:19:30,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-09-20 13:19:30,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:19:30,031 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:19:30,045 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 13:19:30,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 13:19:30,232 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:19:30,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:19:30,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2048484008, now seen corresponding path program 7 times [2024-09-20 13:19:30,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:19:30,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835343516] [2024-09-20 13:19:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:19:30,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:19:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:19:30,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894252812] [2024-09-20 13:19:30,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 13:19:30,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:19:30,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:19:30,314 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:19:30,321 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 13:19:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:19:31,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 262 conjuncts are in the unsatisfiable core [2024-09-20 13:19:31,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:19:31,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:19:31,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-20 13:19:31,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 13:19:32,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 13:19:32,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 13:19:34,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 13:19:34,869 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 36 treesize of output 24 [2024-09-20 13:19:34,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 13:19:34,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 13:19:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 257 proven. 77 refuted. 0 times theorem prover too weak. 1245 trivial. 0 not checked. [2024-09-20 13:19:35,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:19:45,547 WARN L293 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-20 13:19:55,405 WARN L293 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 302] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-20 13:20:01,629 WARN L293 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 302] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-20 13:20:14,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:20:14,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 105 [2024-09-20 13:20:14,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:20:14,402 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 134 treesize of output 125 [2024-09-20 13:20:14,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:20:14,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835343516] [2024-09-20 13:20:14,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:20:14,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894252812] [2024-09-20 13:20:14,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894252812] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:20:14,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:20:14,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-20 13:20:14,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053538844] [2024-09-20 13:20:14,745 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:20:14,745 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 13:20:14,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:20:14,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 13:20:14,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2024-09-20 13:20:14,746 INFO L87 Difference]: Start difference. First operand 164 states and 188 transitions. Second operand has 21 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 10 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-20 13:20:24,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []