./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/vogal-1.i --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 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/vogal-1.i -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 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --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-6908dde-m [2024-09-24 22:58:41,041 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 22:58:41,102 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 22:58:41,107 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 22:58:41,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 22:58:41,128 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 22:58:41,128 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 22:58:41,129 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 22:58:41,129 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 22:58:41,130 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 22:58:41,130 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 22:58:41,131 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 22:58:41,131 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 22:58:41,131 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 22:58:41,132 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 22:58:41,133 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 22:58:41,133 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 22:58:41,133 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 22:58:41,133 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 22:58:41,134 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 22:58:41,134 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 22:58:41,134 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 22:58:41,135 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 22:58:41,135 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 22:58:41,136 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 22:58:41,136 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 22:58:41,137 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 22:58:41,138 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 22:58:41,138 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 22:58:41,138 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 22:58:41,138 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 22:58:41,138 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 22:58:41,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 22:58:41,138 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 22:58:41,139 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 22:58:41,139 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 22:58:41,139 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 22:58:41,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 22:58:41,139 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 22:58:41,139 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 22:58:41,139 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 22:58:41,140 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 22:58:41,140 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 22:58:41,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 22:58:41,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 22:58:41,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 22:58:41,359 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 22:58:41,360 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 22:58:41,360 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/vogal-1.i [2024-09-24 22:58:42,540 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 22:58:42,706 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 22:58:42,707 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/vogal-1.i [2024-09-24 22:58:42,715 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/19fc0aa99/e6c28d90b3984a9abf4e113298b6317f/FLAGc25272f0e [2024-09-24 22:58:42,727 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/19fc0aa99/e6c28d90b3984a9abf4e113298b6317f [2024-09-24 22:58:42,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 22:58:42,730 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 22:58:42,730 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 22:58:42,730 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 22:58:42,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 22:58:42,739 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:42,740 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309ad44d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42, skipping insertion in model container [2024-09-24 22:58:42,740 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:42,755 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 22:58:42,865 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/loops/vogal-1.i[895,908] [2024-09-24 22:58:42,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 22:58:42,887 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 22:58:42,896 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/loops/vogal-1.i[895,908] [2024-09-24 22:58:42,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 22:58:42,925 INFO L204 MainTranslator]: Completed translation [2024-09-24 22:58:42,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42 WrapperNode [2024-09-24 22:58:42,925 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 22:58:42,926 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 22:58:42,927 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 22:58:42,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 22:58:42,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:42,938 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:42,945 INFO L138 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 22:58:42,946 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 22:58:42,946 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 22:58:42,946 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 22:58:42,946 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 22:58:42,954 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:42,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:42,956 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:42,979 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [6, 2, 13]. 62 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [0, 2, 11]. The 1 writes are split as follows [1, 0, 0]. [2024-09-24 22:58:42,983 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:42,983 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:42,992 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:42,998 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:42,999 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:43,000 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:43,005 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 22:58:43,006 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 22:58:43,006 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 22:58:43,006 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 22:58:43,007 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (1/1) ... [2024-09-24 22:58:43,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 22:58:43,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:43,040 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) [2024-09-24 22:58:43,042 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 [2024-09-24 22:58:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 22:58:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 22:58:43,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 22:58:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 22:58:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-24 22:58:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-24 22:58:43,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-24 22:58:43,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-24 22:58:43,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-24 22:58:43,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-24 22:58:43,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 22:58:43,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 22:58:43,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 22:58:43,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 22:58:43,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-24 22:58:43,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-24 22:58:43,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-24 22:58:43,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 22:58:43,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 22:58:43,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-24 22:58:43,135 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 22:58:43,137 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 22:58:43,306 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-09-24 22:58:43,306 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 22:58:43,321 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 22:58:43,321 INFO L317 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-24 22:58:43,321 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:58:43 BoogieIcfgContainer [2024-09-24 22:58:43,321 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 22:58:43,323 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 22:58:43,323 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 22:58:43,326 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 22:58:43,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:58:42" (1/3) ... [2024-09-24 22:58:43,326 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b98e09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:58:43, skipping insertion in model container [2024-09-24 22:58:43,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:42" (2/3) ... [2024-09-24 22:58:43,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b98e09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:58:43, skipping insertion in model container [2024-09-24 22:58:43,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:58:43" (3/3) ... [2024-09-24 22:58:43,328 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2024-09-24 22:58:43,341 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 22:58:43,341 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 22:58:43,383 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 22:58:43,388 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;@5ae635d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 22:58:43,388 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 22:58:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 22:58:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-24 22:58:43,396 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:43,397 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:43,397 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:43,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:43,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1308321975, now seen corresponding path program 1 times [2024-09-24 22:58:43,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:43,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2624490] [2024-09-24 22:58:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:43,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:43,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 22:58:43,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:43,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2624490] [2024-09-24 22:58:43,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2624490] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 22:58:43,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 22:58:43,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-24 22:58:43,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141344368] [2024-09-24 22:58:43,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:58:43,562 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-24 22:58:43,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:43,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-24 22:58:43,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 22:58:43,582 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:43,603 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2024-09-24 22:58:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-24 22:58:43,605 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-24 22:58:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:43,619 INFO L225 Difference]: With dead ends: 64 [2024-09-24 22:58:43,619 INFO L226 Difference]: Without dead ends: 28 [2024-09-24 22:58:43,621 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 22:58:43,623 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:43,624 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 22:58:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-24 22:58:43,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-09-24 22:58:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2024-09-24 22:58:43,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2024-09-24 22:58:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:43,666 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2024-09-24 22:58:43,667 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:43,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:43,667 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2024-09-24 22:58:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-24 22:58:43,668 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:43,668 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:43,668 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 22:58:43,669 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:43,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash 516425503, now seen corresponding path program 1 times [2024-09-24 22:58:43,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:43,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768193906] [2024-09-24 22:58:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:43,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:43,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 22:58:43,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:43,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768193906] [2024-09-24 22:58:43,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768193906] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 22:58:43,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 22:58:43,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 22:58:43,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762834538] [2024-09-24 22:58:43,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:58:43,847 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 22:58:43,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:43,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 22:58:43,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 22:58:43,848 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:43,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:43,886 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2024-09-24 22:58:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 22:58:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-24 22:58:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:43,889 INFO L225 Difference]: With dead ends: 63 [2024-09-24 22:58:43,890 INFO L226 Difference]: Without dead ends: 41 [2024-09-24 22:58:43,890 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 22:58:43,891 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:43,891 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 48 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 22:58:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-24 22:58:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2024-09-24 22:58:43,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-09-24 22:58:43,898 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2024-09-24 22:58:43,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:43,898 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-09-24 22:58:43,899 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:43,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-09-24 22:58:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-24 22:58:43,901 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:43,901 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:43,901 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 22:58:43,901 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:43,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash 22246406, now seen corresponding path program 1 times [2024-09-24 22:58:43,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:43,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981878918] [2024-09-24 22:58:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:43,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:44,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 22:58:44,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:44,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981878918] [2024-09-24 22:58:44,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981878918] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:44,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780032238] [2024-09-24 22:58:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:44,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:44,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:44,057 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) [2024-09-24 22:58:44,059 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 22:58:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:44,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-24 22:58:44,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 22:58:44,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 22:58:44,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780032238] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 22:58:44,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 22:58:44,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2024-09-24 22:58:44,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69928810] [2024-09-24 22:58:44,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:58:44,192 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 22:58:44,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:44,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 22:58:44,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-24 22:58:44,194 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:44,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:44,237 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-24 22:58:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 22:58:44,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-24 22:58:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:44,239 INFO L225 Difference]: With dead ends: 53 [2024-09-24 22:58:44,239 INFO L226 Difference]: Without dead ends: 48 [2024-09-24 22:58:44,239 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-24 22:58:44,241 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:44,242 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 138 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 22:58:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-24 22:58:44,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2024-09-24 22:58:44,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2024-09-24 22:58:44,253 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 20 [2024-09-24 22:58:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:44,253 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2024-09-24 22:58:44,253 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:44,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2024-09-24 22:58:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-24 22:58:44,254 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:44,254 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:44,268 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 22:58:44,455 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 [2024-09-24 22:58:44,455 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:44,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:44,456 INFO L85 PathProgramCache]: Analyzing trace with hash 260967679, now seen corresponding path program 1 times [2024-09-24 22:58:44,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:44,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945277105] [2024-09-24 22:58:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:44,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:44,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 22:58:44,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:44,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945277105] [2024-09-24 22:58:44,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945277105] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:44,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84313359] [2024-09-24 22:58:44,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:44,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:44,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:44,564 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) [2024-09-24 22:58:44,566 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 22:58:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:44,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 22:58:44,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 22:58:44,646 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 22:58:44,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84313359] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 22:58:44,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 22:58:44,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-09-24 22:58:44,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730145816] [2024-09-24 22:58:44,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:58:44,647 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-24 22:58:44,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:44,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-24 22:58:44,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-24 22:58:44,648 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:44,685 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2024-09-24 22:58:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-24 22:58:44,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-24 22:58:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:44,687 INFO L225 Difference]: With dead ends: 74 [2024-09-24 22:58:44,688 INFO L226 Difference]: Without dead ends: 45 [2024-09-24 22:58:44,688 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-24 22:58:44,689 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:44,690 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 22:58:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-24 22:58:44,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-24 22:58:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2024-09-24 22:58:44,700 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 26 [2024-09-24 22:58:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:44,700 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2024-09-24 22:58:44,700 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:44,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2024-09-24 22:58:44,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-24 22:58:44,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:44,701 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:44,715 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-24 22:58:44,905 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 [2024-09-24 22:58:44,909 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:44,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:44,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1671267723, now seen corresponding path program 1 times [2024-09-24 22:58:44,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:44,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573097254] [2024-09-24 22:58:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:44,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:45,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 22:58:45,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573097254] [2024-09-24 22:58:45,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573097254] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612522774] [2024-09-24 22:58:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:45,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:45,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:45,071 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) [2024-09-24 22:58:45,079 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 22:58:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:45,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-24 22:58:45,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 22:58:45,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:45,361 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-24 22:58:45,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 30 [2024-09-24 22:58:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 22:58:45,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612522774] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:45,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-24 22:58:45,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2024-09-24 22:58:45,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599326245] [2024-09-24 22:58:45,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:58:45,390 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 22:58:45,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:45,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 22:58:45,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-24 22:58:45,392 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:45,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:45,521 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2024-09-24 22:58:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 22:58:45,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-24 22:58:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:45,522 INFO L225 Difference]: With dead ends: 65 [2024-09-24 22:58:45,522 INFO L226 Difference]: Without dead ends: 43 [2024-09-24 22:58:45,522 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-24 22:58:45,523 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:45,523 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 123 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 22:58:45,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-24 22:58:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-24 22:58:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2024-09-24 22:58:45,533 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 27 [2024-09-24 22:58:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:45,533 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2024-09-24 22:58:45,533 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:45,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2024-09-24 22:58:45,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-24 22:58:45,534 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:45,534 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:45,551 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 22:58:45,734 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 [2024-09-24 22:58:45,735 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:45,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:45,735 INFO L85 PathProgramCache]: Analyzing trace with hash -400223430, now seen corresponding path program 1 times [2024-09-24 22:58:45,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:45,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115888137] [2024-09-24 22:58:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:45,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:45,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 22:58:45,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:45,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115888137] [2024-09-24 22:58:45,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115888137] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:45,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599567869] [2024-09-24 22:58:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:45,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:45,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:45,804 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) [2024-09-24 22:58:45,805 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 22:58:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:45,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-24 22:58:45,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:45,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 8 [2024-09-24 22:58:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 22:58:45,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:46,099 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-24 22:58:46,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2024-09-24 22:58:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 22:58:46,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599567869] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:46,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:46,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 7] total 15 [2024-09-24 22:58:46,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748818987] [2024-09-24 22:58:46,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:46,125 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 22:58:46,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:46,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 22:58:46,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-24 22:58:46,126 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:46,269 INFO L93 Difference]: Finished difference Result 124 states and 169 transitions. [2024-09-24 22:58:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-24 22:58:46,269 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-24 22:58:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:46,270 INFO L225 Difference]: With dead ends: 124 [2024-09-24 22:58:46,270 INFO L226 Difference]: Without dead ends: 88 [2024-09-24 22:58:46,270 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2024-09-24 22:58:46,271 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:46,271 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 205 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 22:58:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-24 22:58:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 46. [2024-09-24 22:58:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-09-24 22:58:46,280 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 28 [2024-09-24 22:58:46,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:46,280 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-09-24 22:58:46,280 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:46,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-09-24 22:58:46,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-24 22:58:46,281 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:46,281 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:46,296 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-24 22:58:46,481 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 [2024-09-24 22:58:46,482 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:46,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:46,482 INFO L85 PathProgramCache]: Analyzing trace with hash -461832489, now seen corresponding path program 1 times [2024-09-24 22:58:46,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:46,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119313140] [2024-09-24 22:58:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:46,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:46,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-24 22:58:46,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119313140] [2024-09-24 22:58:46,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119313140] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66043413] [2024-09-24 22:58:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:46,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:46,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:46,554 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) [2024-09-24 22:58:46,555 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 22:58:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:46,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-24 22:58:46,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 22:58:46,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 22:58:46,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66043413] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:46,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-24 22:58:46,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 10] total 19 [2024-09-24 22:58:46,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347662082] [2024-09-24 22:58:46,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:58:46,903 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-24 22:58:46,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:46,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-24 22:58:46,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-09-24 22:58:46,904 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:46,994 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2024-09-24 22:58:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 22:58:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-24 22:58:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:46,995 INFO L225 Difference]: With dead ends: 67 [2024-09-24 22:58:46,995 INFO L226 Difference]: Without dead ends: 47 [2024-09-24 22:58:46,995 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2024-09-24 22:58:46,996 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:46,996 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 125 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 22:58:46,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-24 22:58:47,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-24 22:58:47,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2024-09-24 22:58:47,004 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 30 [2024-09-24 22:58:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:47,004 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2024-09-24 22:58:47,004 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:47,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2024-09-24 22:58:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-24 22:58:47,005 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:47,005 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:47,018 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-24 22:58:47,209 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 [2024-09-24 22:58:47,210 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:47,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1639910757, now seen corresponding path program 1 times [2024-09-24 22:58:47,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:47,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962493886] [2024-09-24 22:58:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:47,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:47,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-24 22:58:47,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:47,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962493886] [2024-09-24 22:58:47,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962493886] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:47,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278742843] [2024-09-24 22:58:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:47,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:47,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:47,288 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) [2024-09-24 22:58:47,289 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 22:58:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:47,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-24 22:58:47,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-24 22:58:47,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-24 22:58:47,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278742843] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:47,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-24 22:58:47,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 7 [2024-09-24 22:58:47,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108052646] [2024-09-24 22:58:47,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:58:47,358 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 22:58:47,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 22:58:47,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-09-24 22:58:47,359 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:47,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:47,381 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2024-09-24 22:58:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 22:58:47,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-24 22:58:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:47,382 INFO L225 Difference]: With dead ends: 82 [2024-09-24 22:58:47,382 INFO L226 Difference]: Without dead ends: 51 [2024-09-24 22:58:47,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-09-24 22:58:47,383 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:47,383 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 22:58:47,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-24 22:58:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-24 22:58:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2024-09-24 22:58:47,392 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 33 [2024-09-24 22:58:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:47,392 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2024-09-24 22:58:47,392 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:47,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2024-09-24 22:58:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-24 22:58:47,393 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:47,393 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:47,406 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-24 22:58:47,597 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:47,598 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:47,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:47,598 INFO L85 PathProgramCache]: Analyzing trace with hash 868410046, now seen corresponding path program 1 times [2024-09-24 22:58:47,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:47,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708044160] [2024-09-24 22:58:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:47,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:47,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-24 22:58:47,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:47,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708044160] [2024-09-24 22:58:47,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708044160] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:47,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337030418] [2024-09-24 22:58:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:47,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:47,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:47,703 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) [2024-09-24 22:58:47,705 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 22:58:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:47,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-24 22:58:47,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-24 22:58:47,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-24 22:58:47,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337030418] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:47,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:47,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2024-09-24 22:58:47,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185491542] [2024-09-24 22:58:47,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:47,807 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-24 22:58:47,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:47,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-24 22:58:47,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-09-24 22:58:47,808 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:48,022 INFO L93 Difference]: Finished difference Result 249 states and 350 transitions. [2024-09-24 22:58:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-24 22:58:48,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-24 22:58:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:48,024 INFO L225 Difference]: With dead ends: 249 [2024-09-24 22:58:48,024 INFO L226 Difference]: Without dead ends: 206 [2024-09-24 22:58:48,025 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2024-09-24 22:58:48,026 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 220 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:48,026 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 151 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 22:58:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-09-24 22:58:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 64. [2024-09-24 22:58:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 59 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2024-09-24 22:58:48,047 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 36 [2024-09-24 22:58:48,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:48,047 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2024-09-24 22:58:48,047 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:48,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2024-09-24 22:58:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-24 22:58:48,049 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:48,049 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:58:48,061 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-24 22:58:48,249 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:48,250 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:48,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash 108884364, now seen corresponding path program 2 times [2024-09-24 22:58:48,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:48,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538551510] [2024-09-24 22:58:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:48,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:48,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 22:58:48,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:48,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538551510] [2024-09-24 22:58:48,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538551510] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:48,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276799262] [2024-09-24 22:58:48,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 22:58:48,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:48,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:48,367 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) [2024-09-24 22:58:48,368 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-24 22:58:48,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 22:58:48,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 22:58:48,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-24 22:58:48,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 22:58:48,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 22:58:48,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276799262] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:48,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:48,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-24 22:58:48,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946994569] [2024-09-24 22:58:48,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:48,498 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-24 22:58:48,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:48,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-24 22:58:48,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-09-24 22:58:48,499 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:48,651 INFO L93 Difference]: Finished difference Result 309 states and 413 transitions. [2024-09-24 22:58:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 22:58:48,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-24 22:58:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:48,653 INFO L225 Difference]: With dead ends: 309 [2024-09-24 22:58:48,653 INFO L226 Difference]: Without dead ends: 254 [2024-09-24 22:58:48,654 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-09-24 22:58:48,654 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 205 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:48,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 264 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 22:58:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-24 22:58:48,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 66. [2024-09-24 22:58:48,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:48,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2024-09-24 22:58:48,675 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 43 [2024-09-24 22:58:48,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:48,676 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2024-09-24 22:58:48,676 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:48,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:48,676 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2024-09-24 22:58:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-24 22:58:48,677 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:48,677 INFO L216 NwaCegarLoop]: trace histogram [5, 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] [2024-09-24 22:58:48,690 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-24 22:58:48,878 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:48,879 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:48,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:48,879 INFO L85 PathProgramCache]: Analyzing trace with hash 974810732, now seen corresponding path program 3 times [2024-09-24 22:58:48,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:48,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854561528] [2024-09-24 22:58:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:48,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:49,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-24 22:58:49,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:49,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854561528] [2024-09-24 22:58:49,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854561528] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:49,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66014441] [2024-09-24 22:58:49,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 22:58:49,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:49,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:49,266 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) [2024-09-24 22:58:49,267 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-24 22:58:49,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 22:58:49,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 22:58:49,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-24 22:58:49,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-24 22:58:49,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-24 22:58:49,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66014441] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:49,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:49,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-09-24 22:58:49,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537645994] [2024-09-24 22:58:49,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:49,637 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-24 22:58:49,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:49,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-24 22:58:49,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-09-24 22:58:49,638 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:49,794 INFO L93 Difference]: Finished difference Result 182 states and 237 transitions. [2024-09-24 22:58:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-24 22:58:49,795 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-24 22:58:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:49,796 INFO L225 Difference]: With dead ends: 182 [2024-09-24 22:58:49,796 INFO L226 Difference]: Without dead ends: 176 [2024-09-24 22:58:49,796 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-09-24 22:58:49,797 INFO L434 NwaCegarLoop]: 98 mSDtfsCounter, 151 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:49,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1046 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 22:58:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-09-24 22:58:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 110. [2024-09-24 22:58:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.3142857142857143) internal successors, (138), 105 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2024-09-24 22:58:49,827 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 45 [2024-09-24 22:58:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:49,827 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2024-09-24 22:58:49,827 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:49,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2024-09-24 22:58:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-24 22:58:49,828 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:49,828 INFO L216 NwaCegarLoop]: trace histogram [5, 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] [2024-09-24 22:58:49,841 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-24 22:58:50,032 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-24 22:58:50,033 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:50,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:50,033 INFO L85 PathProgramCache]: Analyzing trace with hash 581783722, now seen corresponding path program 1 times [2024-09-24 22:58:50,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:50,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395616455] [2024-09-24 22:58:50,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:50,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:50,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 22:58:50,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:50,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395616455] [2024-09-24 22:58:50,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395616455] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:50,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603048161] [2024-09-24 22:58:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:50,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:50,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:50,756 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) [2024-09-24 22:58:50,757 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-24 22:58:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:50,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-24 22:58:50,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:51,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-24 22:58:51,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-24 22:58:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 22:58:51,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:51,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:58:51,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 57 [2024-09-24 22:58:51,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:58:51,480 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 47 treesize of output 35 [2024-09-24 22:58:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-24 22:58:51,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603048161] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:51,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:51,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 13] total 31 [2024-09-24 22:58:51,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796718517] [2024-09-24 22:58:51,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:51,648 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-24 22:58:51,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:51,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-24 22:58:51,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2024-09-24 22:58:51,649 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:55,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:55,240 INFO L93 Difference]: Finished difference Result 538 states and 741 transitions. [2024-09-24 22:58:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-09-24 22:58:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-24 22:58:55,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:55,242 INFO L225 Difference]: With dead ends: 538 [2024-09-24 22:58:55,242 INFO L226 Difference]: Without dead ends: 447 [2024-09-24 22:58:55,245 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2974 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1492, Invalid=8408, Unknown=0, NotChecked=0, Total=9900 [2024-09-24 22:58:55,245 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 482 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:55,245 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 430 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 22:58:55,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2024-09-24 22:58:55,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 228. [2024-09-24 22:58:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.304932735426009) internal successors, (291), 223 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:55,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 295 transitions. [2024-09-24 22:58:55,318 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 295 transitions. Word has length 45 [2024-09-24 22:58:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:55,318 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 295 transitions. [2024-09-24 22:58:55,318 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:55,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:55,318 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 295 transitions. [2024-09-24 22:58:55,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-24 22:58:55,319 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:55,319 INFO L216 NwaCegarLoop]: trace histogram [5, 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] [2024-09-24 22:58:55,331 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-24 22:58:55,519 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-24 22:58:55,520 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:55,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1193665450, now seen corresponding path program 1 times [2024-09-24 22:58:55,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:55,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54102586] [2024-09-24 22:58:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:55,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:58:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:56,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:58:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-24 22:58:56,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:58:56,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54102586] [2024-09-24 22:58:56,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54102586] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:58:56,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52214979] [2024-09-24 22:58:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:56,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:56,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:58:56,067 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) [2024-09-24 22:58:56,068 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-24 22:58:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:58:56,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-24 22:58:56,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:58:56,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:58:56,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 82 [2024-09-24 22:58:56,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:58:56,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 36 [2024-09-24 22:58:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 22:58:57,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:58:57,541 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2024-09-24 22:58:57,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 1 [2024-09-24 22:58:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-24 22:58:57,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52214979] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:58:57,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:58:57,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 13] total 32 [2024-09-24 22:58:57,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955228878] [2024-09-24 22:58:57,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:58:57,544 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-24 22:58:57,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:58:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-24 22:58:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2024-09-24 22:58:57,545 INFO L87 Difference]: Start difference. First operand 228 states and 295 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:58:59,646 INFO L93 Difference]: Finished difference Result 609 states and 805 transitions. [2024-09-24 22:58:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-24 22:58:59,647 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-24 22:58:59,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:58:59,654 INFO L225 Difference]: With dead ends: 609 [2024-09-24 22:58:59,654 INFO L226 Difference]: Without dead ends: 533 [2024-09-24 22:58:59,655 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1175, Invalid=4375, Unknown=0, NotChecked=0, Total=5550 [2024-09-24 22:58:59,655 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 339 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 22:58:59,656 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 231 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 22:58:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2024-09-24 22:58:59,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 219. [2024-09-24 22:58:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.2570093457943925) internal successors, (269), 214 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 273 transitions. [2024-09-24 22:58:59,753 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 273 transitions. Word has length 45 [2024-09-24 22:58:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:58:59,754 INFO L474 AbstractCegarLoop]: Abstraction has 219 states and 273 transitions. [2024-09-24 22:58:59,754 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:58:59,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 273 transitions. [2024-09-24 22:58:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-24 22:58:59,755 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:58:59,755 INFO L216 NwaCegarLoop]: trace histogram [5, 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] [2024-09-24 22:58:59,772 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-24 22:58:59,956 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:58:59,956 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:58:59,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:58:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash 213832426, now seen corresponding path program 1 times [2024-09-24 22:58:59,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:58:59,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516046412] [2024-09-24 22:58:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:58:59,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:59:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:00,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:59:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 22:59:00,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:59:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516046412] [2024-09-24 22:59:00,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516046412] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:59:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124444292] [2024-09-24 22:59:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:59:00,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:59:00,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:59:00,793 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) [2024-09-24 22:59:00,794 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-24 22:59:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:00,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-24 22:59:00,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:59:01,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-24 22:59:01,064 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 15 treesize of output 7 [2024-09-24 22:59:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-24 22:59:01,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:59:01,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:59:01,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 55 [2024-09-24 22:59:01,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:59:01,382 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 45 treesize of output 35 [2024-09-24 22:59:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-24 22:59:01,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124444292] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:59:01,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:59:01,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 33 [2024-09-24 22:59:01,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469822294] [2024-09-24 22:59:01,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:59:01,450 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-24 22:59:01,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:59:01,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-24 22:59:01,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2024-09-24 22:59:01,450 INFO L87 Difference]: Start difference. First operand 219 states and 273 transitions. Second operand has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:59:02,673 INFO L93 Difference]: Finished difference Result 731 states and 934 transitions. [2024-09-24 22:59:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-24 22:59:02,674 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-24 22:59:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:59:02,676 INFO L225 Difference]: With dead ends: 731 [2024-09-24 22:59:02,676 INFO L226 Difference]: Without dead ends: 542 [2024-09-24 22:59:02,680 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=763, Invalid=3397, Unknown=0, NotChecked=0, Total=4160 [2024-09-24 22:59:02,680 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 262 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 22:59:02,681 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 319 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 22:59:02,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2024-09-24 22:59:02,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 410. [2024-09-24 22:59:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 405 states have (on average 1.2864197530864196) internal successors, (521), 405 states have internal predecessors, (521), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 525 transitions. [2024-09-24 22:59:02,874 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 525 transitions. Word has length 45 [2024-09-24 22:59:02,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:59:02,874 INFO L474 AbstractCegarLoop]: Abstraction has 410 states and 525 transitions. [2024-09-24 22:59:02,875 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:02,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:02,875 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 525 transitions. [2024-09-24 22:59:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-24 22:59:02,875 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:59:02,875 INFO L216 NwaCegarLoop]: trace histogram [5, 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] [2024-09-24 22:59:02,887 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-24 22:59:03,076 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-24 22:59:03,076 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:59:03,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash 941187050, now seen corresponding path program 1 times [2024-09-24 22:59:03,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:59:03,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314442555] [2024-09-24 22:59:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:59:03,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:59:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:03,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:59:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 22:59:03,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:59:03,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314442555] [2024-09-24 22:59:03,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314442555] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:59:03,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361137879] [2024-09-24 22:59:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:59:03,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:59:03,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:59:03,931 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) [2024-09-24 22:59:03,932 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-24 22:59:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:03,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-24 22:59:03,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:59:04,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 12 [2024-09-24 22:59:04,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 8 [2024-09-24 22:59:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-24 22:59:04,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:59:04,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:59:04,460 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 24 treesize of output 22 [2024-09-24 22:59:04,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:59:04,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 42 [2024-09-24 22:59:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-24 22:59:04,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361137879] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:59:04,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:59:04,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 33 [2024-09-24 22:59:04,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331410955] [2024-09-24 22:59:04,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:59:04,529 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-24 22:59:04,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:59:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-24 22:59:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2024-09-24 22:59:04,530 INFO L87 Difference]: Start difference. First operand 410 states and 525 transitions. Second operand has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:59:05,590 INFO L93 Difference]: Finished difference Result 660 states and 824 transitions. [2024-09-24 22:59:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-24 22:59:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-24 22:59:05,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:59:05,593 INFO L225 Difference]: With dead ends: 660 [2024-09-24 22:59:05,593 INFO L226 Difference]: Without dead ends: 449 [2024-09-24 22:59:05,594 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=584, Invalid=2496, Unknown=0, NotChecked=0, Total=3080 [2024-09-24 22:59:05,594 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 221 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 22:59:05,594 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 387 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 22:59:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-09-24 22:59:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 316. [2024-09-24 22:59:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 1.2443729903536977) internal successors, (387), 311 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 391 transitions. [2024-09-24 22:59:05,739 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 391 transitions. Word has length 45 [2024-09-24 22:59:05,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:59:05,739 INFO L474 AbstractCegarLoop]: Abstraction has 316 states and 391 transitions. [2024-09-24 22:59:05,739 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:05,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:05,740 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 391 transitions. [2024-09-24 22:59:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-24 22:59:05,740 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:59:05,740 INFO L216 NwaCegarLoop]: trace histogram [5, 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] [2024-09-24 22:59:05,753 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-24 22:59:05,940 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-24 22:59:05,941 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:59:05,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:05,941 INFO L85 PathProgramCache]: Analyzing trace with hash 747408046, now seen corresponding path program 2 times [2024-09-24 22:59:05,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:59:05,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140357153] [2024-09-24 22:59:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:59:05,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:59:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:06,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:59:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-24 22:59:06,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:59:06,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140357153] [2024-09-24 22:59:06,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140357153] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:59:06,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796821180] [2024-09-24 22:59:06,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 22:59:06,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:59:06,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:59:06,690 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) [2024-09-24 22:59:06,691 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-24 22:59:06,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 22:59:06,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 22:59:06,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-24 22:59:06,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:59:07,001 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 20 treesize of output 12 [2024-09-24 22:59:07,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-09-24 22:59:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 22:59:07,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:59:07,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:59:07,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2024-09-24 22:59:07,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 22:59:07,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 42 [2024-09-24 22:59:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-24 22:59:07,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796821180] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:59:07,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:59:07,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 36 [2024-09-24 22:59:07,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938275626] [2024-09-24 22:59:07,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:59:07,357 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-24 22:59:07,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:59:07,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-24 22:59:07,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2024-09-24 22:59:07,358 INFO L87 Difference]: Start difference. First operand 316 states and 391 transitions. Second operand has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 36 states have internal predecessors, (91), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:59:08,242 INFO L93 Difference]: Finished difference Result 521 states and 639 transitions. [2024-09-24 22:59:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-24 22:59:08,243 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 36 states have internal predecessors, (91), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-24 22:59:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:59:08,245 INFO L225 Difference]: With dead ends: 521 [2024-09-24 22:59:08,245 INFO L226 Difference]: Without dead ends: 456 [2024-09-24 22:59:08,245 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=541, Invalid=2009, Unknown=0, NotChecked=0, Total=2550 [2024-09-24 22:59:08,246 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 166 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 22:59:08,246 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 320 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 22:59:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2024-09-24 22:59:08,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 319. [2024-09-24 22:59:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.2292993630573248) internal successors, (386), 314 states have internal predecessors, (386), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 390 transitions. [2024-09-24 22:59:08,407 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 390 transitions. Word has length 45 [2024-09-24 22:59:08,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:59:08,407 INFO L474 AbstractCegarLoop]: Abstraction has 319 states and 390 transitions. [2024-09-24 22:59:08,407 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 36 states have internal predecessors, (91), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:08,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 390 transitions. [2024-09-24 22:59:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-24 22:59:08,408 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:59:08,408 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:59:08,421 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-24 22:59:08,608 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-24 22:59:08,609 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:59:08,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:08,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1628474760, now seen corresponding path program 1 times [2024-09-24 22:59:08,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:59:08,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350783667] [2024-09-24 22:59:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:59:08,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:59:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:09,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:59:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-24 22:59:09,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:59:09,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350783667] [2024-09-24 22:59:09,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350783667] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:59:09,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697283707] [2024-09-24 22:59:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:59:09,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:59:09,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:59:09,108 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) [2024-09-24 22:59:09,110 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-24 22:59:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:09,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-24 22:59:09,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:59:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 22:59:09,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:59:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-24 22:59:09,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697283707] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:59:09,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:59:09,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 15] total 37 [2024-09-24 22:59:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8694126] [2024-09-24 22:59:09,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:59:09,977 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-24 22:59:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:59:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-24 22:59:09,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2024-09-24 22:59:09,978 INFO L87 Difference]: Start difference. First operand 319 states and 390 transitions. Second operand has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:59:10,768 INFO L93 Difference]: Finished difference Result 525 states and 643 transitions. [2024-09-24 22:59:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-24 22:59:10,769 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2024-09-24 22:59:10,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:59:10,771 INFO L225 Difference]: With dead ends: 525 [2024-09-24 22:59:10,771 INFO L226 Difference]: Without dead ends: 449 [2024-09-24 22:59:10,772 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=443, Invalid=1813, Unknown=0, NotChecked=0, Total=2256 [2024-09-24 22:59:10,772 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 146 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 22:59:10,772 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 411 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 22:59:10,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-09-24 22:59:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 299. [2024-09-24 22:59:10,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.2346938775510203) internal successors, (363), 294 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 367 transitions. [2024-09-24 22:59:10,923 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 367 transitions. Word has length 55 [2024-09-24 22:59:10,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:59:10,924 INFO L474 AbstractCegarLoop]: Abstraction has 299 states and 367 transitions. [2024-09-24 22:59:10,924 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:10,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:10,924 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 367 transitions. [2024-09-24 22:59:10,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-24 22:59:10,924 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:59:10,925 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:59:10,937 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-24 22:59:11,125 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-24 22:59:11,125 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:59:11,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash -806948564, now seen corresponding path program 2 times [2024-09-24 22:59:11,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:59:11,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430828742] [2024-09-24 22:59:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:59:11,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:59:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:11,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:59:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-24 22:59:11,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:59:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430828742] [2024-09-24 22:59:11,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430828742] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:59:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079302036] [2024-09-24 22:59:11,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 22:59:11,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:59:11,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:59:11,497 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 22:59:11,499 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-24 22:59:11,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 22:59:11,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 22:59:11,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-24 22:59:11,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:59:11,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 8 [2024-09-24 22:59:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-24 22:59:11,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:59:11,918 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-24 22:59:11,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2024-09-24 22:59:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-24 22:59:11,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079302036] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:59:11,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:59:11,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 11] total 24 [2024-09-24 22:59:11,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006677525] [2024-09-24 22:59:11,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:59:11,944 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-24 22:59:11,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:59:11,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-24 22:59:11,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2024-09-24 22:59:11,945 INFO L87 Difference]: Start difference. First operand 299 states and 367 transitions. Second operand has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:59:12,403 INFO L93 Difference]: Finished difference Result 462 states and 573 transitions. [2024-09-24 22:59:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-24 22:59:12,404 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2024-09-24 22:59:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:59:12,406 INFO L225 Difference]: With dead ends: 462 [2024-09-24 22:59:12,406 INFO L226 Difference]: Without dead ends: 457 [2024-09-24 22:59:12,406 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2024-09-24 22:59:12,406 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 172 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 22:59:12,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 347 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 22:59:12,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2024-09-24 22:59:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 320. [2024-09-24 22:59:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.2190476190476192) internal successors, (384), 315 states have internal predecessors, (384), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 388 transitions. [2024-09-24 22:59:12,577 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 388 transitions. Word has length 56 [2024-09-24 22:59:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:59:12,577 INFO L474 AbstractCegarLoop]: Abstraction has 320 states and 388 transitions. [2024-09-24 22:59:12,577 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:12,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 388 transitions. [2024-09-24 22:59:12,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-24 22:59:12,578 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:59:12,578 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:59:12,592 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-24 22:59:12,778 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:59:12,779 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:59:12,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:12,779 INFO L85 PathProgramCache]: Analyzing trace with hash 828990910, now seen corresponding path program 3 times [2024-09-24 22:59:12,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:59:12,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731162227] [2024-09-24 22:59:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:59:12,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:59:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:13,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:59:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-24 22:59:13,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:59:13,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731162227] [2024-09-24 22:59:13,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731162227] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:59:13,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499290435] [2024-09-24 22:59:13,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 22:59:13,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:59:13,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:59:13,706 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 22:59:13,707 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-24 22:59:13,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-24 22:59:13,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 22:59:13,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-24 22:59:13,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:59:13,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2024-09-24 22:59:13,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-09-24 22:59:14,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-24 22:59:14,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-24 22:59:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-24 22:59:14,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:59:26,558 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-09-24 22:59:26,559 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 68 treesize of output 52 [2024-09-24 22:59:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-24 22:59:34,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499290435] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 22:59:34,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 22:59:34,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 40 [2024-09-24 22:59:34,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124082134] [2024-09-24 22:59:34,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 22:59:34,775 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-24 22:59:34,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:59:34,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-24 22:59:34,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1281, Unknown=4, NotChecked=0, Total=1560 [2024-09-24 22:59:34,776 INFO L87 Difference]: Start difference. First operand 320 states and 388 transitions. Second operand has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 22:59:47,105 WARN L293 SmtUtils]: Spent 12.03s on a formula simplification. DAG size of input: 37 DAG size of output: 35 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 22:59:59,198 WARN L293 SmtUtils]: Spent 12.03s on a formula simplification. DAG size of input: 33 DAG size of output: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:00:11,539 WARN L293 SmtUtils]: Spent 12.03s on a formula simplification. DAG size of input: 49 DAG size of output: 35 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:00:23,840 WARN L293 SmtUtils]: Spent 12.09s on a formula simplification. DAG size of input: 33 DAG size of output: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:00:36,651 WARN L293 SmtUtils]: Spent 12.09s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:00:49,063 WARN L293 SmtUtils]: Spent 12.04s on a formula simplification. DAG size of input: 31 DAG size of output: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:01:01,752 WARN L293 SmtUtils]: Spent 12.11s on a formula simplification. DAG size of input: 35 DAG size of output: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:01:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:01:02,078 INFO L93 Difference]: Finished difference Result 1577 states and 2017 transitions. [2024-09-24 23:01:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-09-24 23:01:02,078 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2024-09-24 23:01:02,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:01:02,082 INFO L225 Difference]: With dead ends: 1577 [2024-09-24 23:01:02,082 INFO L226 Difference]: Without dead ends: 1294 [2024-09-24 23:01:02,083 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 102.3s TimeCoverageRelationStatistics Valid=1252, Invalid=6226, Unknown=4, NotChecked=0, Total=7482 [2024-09-24 23:01:02,084 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 478 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:01:02,084 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 515 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 23:01:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2024-09-24 23:01:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 659. [2024-09-24 23:01:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 654 states have (on average 1.2339449541284404) internal successors, (807), 654 states have internal predecessors, (807), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 811 transitions. [2024-09-24 23:01:02,495 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 811 transitions. Word has length 66 [2024-09-24 23:01:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:01:02,496 INFO L474 AbstractCegarLoop]: Abstraction has 659 states and 811 transitions. [2024-09-24 23:01:02,496 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:02,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:02,496 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 811 transitions. [2024-09-24 23:01:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-24 23:01:02,497 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:01:02,497 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:01:02,511 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-24 23:01:02,697 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:01:02,698 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:01:02,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:02,698 INFO L85 PathProgramCache]: Analyzing trace with hash -289774206, now seen corresponding path program 4 times [2024-09-24 23:01:02,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:01:02,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388862217] [2024-09-24 23:01:02,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:01:02,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:01:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:04,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:01:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-24 23:01:04,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:01:04,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388862217] [2024-09-24 23:01:04,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388862217] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:01:04,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033465559] [2024-09-24 23:01:04,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:01:04,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:01:04,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:01:04,184 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:01:04,184 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-24 23:01:04,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:01:04,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:01:04,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-24 23:01:04,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:01:04,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-24 23:01:04,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-24 23:01:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-24 23:01:04,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:01:05,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 23:01:05,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2024-09-24 23:01:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-24 23:01:05,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033465559] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:01:05,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:01:05,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 15] total 43 [2024-09-24 23:01:05,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332941813] [2024-09-24 23:01:05,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:01:05,475 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-24 23:01:05,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:01:05,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-24 23:01:05,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2024-09-24 23:01:05,477 INFO L87 Difference]: Start difference. First operand 659 states and 811 transitions. Second operand has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 43 states have internal predecessors, (131), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:01:11,721 INFO L93 Difference]: Finished difference Result 2315 states and 2893 transitions. [2024-09-24 23:01:11,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-24 23:01:11,722 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 43 states have internal predecessors, (131), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2024-09-24 23:01:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:01:11,726 INFO L225 Difference]: With dead ends: 2315 [2024-09-24 23:01:11,726 INFO L226 Difference]: Without dead ends: 1301 [2024-09-24 23:01:11,729 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3206 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1680, Invalid=9032, Unknown=0, NotChecked=0, Total=10712 [2024-09-24 23:01:11,729 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 349 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:01:11,730 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 641 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-24 23:01:11,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2024-09-24 23:01:12,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 821. [2024-09-24 23:01:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 816 states have (on average 1.196078431372549) internal successors, (976), 816 states have internal predecessors, (976), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 980 transitions. [2024-09-24 23:01:12,274 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 980 transitions. Word has length 66 [2024-09-24 23:01:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:01:12,274 INFO L474 AbstractCegarLoop]: Abstraction has 821 states and 980 transitions. [2024-09-24 23:01:12,274 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 43 states have internal predecessors, (131), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:12,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 980 transitions. [2024-09-24 23:01:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-24 23:01:12,276 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:01:12,276 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:01:12,288 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-24 23:01:12,476 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:01:12,476 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:01:12,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:12,477 INFO L85 PathProgramCache]: Analyzing trace with hash 571791422, now seen corresponding path program 5 times [2024-09-24 23:01:12,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:01:12,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982193273] [2024-09-24 23:01:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:01:12,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:01:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:13,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:01:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-24 23:01:13,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:01:13,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982193273] [2024-09-24 23:01:13,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982193273] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:01:13,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46533380] [2024-09-24 23:01:13,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:01:13,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:01:13,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:01:13,780 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:01:13,781 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-24 23:01:14,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-24 23:01:14,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:01:14,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-24 23:01:14,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:01:14,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-09-24 23:01:14,946 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 16 treesize of output 8 [2024-09-24 23:01:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 23:01:14,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:01:15,347 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-24 23:01:15,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2024-09-24 23:01:15,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-09-24 23:01:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-24 23:01:15,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46533380] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:01:15,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:01:15,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 14] total 41 [2024-09-24 23:01:15,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142069908] [2024-09-24 23:01:15,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:01:15,464 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-24 23:01:15,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:01:15,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-24 23:01:15,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2024-09-24 23:01:15,465 INFO L87 Difference]: Start difference. First operand 821 states and 980 transitions. Second operand has 41 states, 41 states have (on average 3.048780487804878) internal successors, (125), 41 states have internal predecessors, (125), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:01:19,798 INFO L93 Difference]: Finished difference Result 1930 states and 2325 transitions. [2024-09-24 23:01:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-09-24 23:01:19,798 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.048780487804878) internal successors, (125), 41 states have internal predecessors, (125), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2024-09-24 23:01:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:01:19,802 INFO L225 Difference]: With dead ends: 1930 [2024-09-24 23:01:19,803 INFO L226 Difference]: Without dead ends: 1096 [2024-09-24 23:01:19,804 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2513 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1206, Invalid=7914, Unknown=0, NotChecked=0, Total=9120 [2024-09-24 23:01:19,804 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 370 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-24 23:01:19,805 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 697 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-24 23:01:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2024-09-24 23:01:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 771. [2024-09-24 23:01:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 766 states have (on average 1.154046997389034) internal successors, (884), 766 states have internal predecessors, (884), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 888 transitions. [2024-09-24 23:01:20,312 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 888 transitions. Word has length 66 [2024-09-24 23:01:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:01:20,312 INFO L474 AbstractCegarLoop]: Abstraction has 771 states and 888 transitions. [2024-09-24 23:01:20,312 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.048780487804878) internal successors, (125), 41 states have internal predecessors, (125), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:20,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 888 transitions. [2024-09-24 23:01:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-24 23:01:20,313 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:01:20,314 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:01:20,326 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-24 23:01:20,514 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-24 23:01:20,514 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:01:20,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:20,515 INFO L85 PathProgramCache]: Analyzing trace with hash 378012418, now seen corresponding path program 6 times [2024-09-24 23:01:20,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:01:20,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384575278] [2024-09-24 23:01:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:01:20,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:01:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:22,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:01:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-24 23:01:22,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:01:22,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384575278] [2024-09-24 23:01:22,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384575278] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:01:22,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311212345] [2024-09-24 23:01:22,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:01:22,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:01:22,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:01:22,021 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:01:22,022 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-24 23:01:22,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-24 23:01:22,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:01:22,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-24 23:01:22,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:01:22,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 8 [2024-09-24 23:01:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-24 23:01:22,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:01:23,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 23:01:23,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2024-09-24 23:01:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-24 23:01:23,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311212345] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:01:23,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:01:23,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 15] total 49 [2024-09-24 23:01:23,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830042221] [2024-09-24 23:01:23,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:01:23,495 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-24 23:01:23,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:01:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-24 23:01:23,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2065, Unknown=0, NotChecked=0, Total=2352 [2024-09-24 23:01:23,496 INFO L87 Difference]: Start difference. First operand 771 states and 888 transitions. Second operand has 49 states, 49 states have (on average 2.938775510204082) internal successors, (144), 49 states have internal predecessors, (144), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:01:26,289 INFO L93 Difference]: Finished difference Result 1428 states and 1646 transitions. [2024-09-24 23:01:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-24 23:01:26,289 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.938775510204082) internal successors, (144), 49 states have internal predecessors, (144), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2024-09-24 23:01:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:01:26,294 INFO L225 Difference]: With dead ends: 1428 [2024-09-24 23:01:26,294 INFO L226 Difference]: Without dead ends: 1036 [2024-09-24 23:01:26,296 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=912, Invalid=5894, Unknown=0, NotChecked=0, Total=6806 [2024-09-24 23:01:26,296 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 314 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:01:26,296 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 566 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-24 23:01:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2024-09-24 23:01:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 891. [2024-09-24 23:01:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 886 states have (on average 1.1613995485327313) internal successors, (1029), 886 states have internal predecessors, (1029), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:26,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1033 transitions. [2024-09-24 23:01:26,918 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1033 transitions. Word has length 66 [2024-09-24 23:01:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:01:26,918 INFO L474 AbstractCegarLoop]: Abstraction has 891 states and 1033 transitions. [2024-09-24 23:01:26,919 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.938775510204082) internal successors, (144), 49 states have internal predecessors, (144), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:26,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1033 transitions. [2024-09-24 23:01:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-09-24 23:01:26,920 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:01:26,920 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 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] [2024-09-24 23:01:26,933 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-24 23:01:27,121 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-24 23:01:27,121 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:01:27,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:27,121 INFO L85 PathProgramCache]: Analyzing trace with hash 128915325, now seen corresponding path program 7 times [2024-09-24 23:01:27,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:01:27,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304917192] [2024-09-24 23:01:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:01:27,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:01:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:27,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:01:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-24 23:01:27,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:01:27,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304917192] [2024-09-24 23:01:27,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304917192] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:01:27,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754537571] [2024-09-24 23:01:27,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:01:27,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:01:27,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:01:27,295 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:01:27,296 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-24 23:01:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:27,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-24 23:01:27,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:01:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-24 23:01:27,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:01:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-24 23:01:27,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754537571] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:01:27,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:01:27,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 20 [2024-09-24 23:01:27,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040357669] [2024-09-24 23:01:27,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:01:27,651 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-24 23:01:27,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:01:27,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-24 23:01:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-24 23:01:27,653 INFO L87 Difference]: Start difference. First operand 891 states and 1033 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:28,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:01:28,311 INFO L93 Difference]: Finished difference Result 1187 states and 1339 transitions. [2024-09-24 23:01:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-24 23:01:28,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2024-09-24 23:01:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:01:28,315 INFO L225 Difference]: With dead ends: 1187 [2024-09-24 23:01:28,315 INFO L226 Difference]: Without dead ends: 765 [2024-09-24 23:01:28,315 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-24 23:01:28,316 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:01:28,316 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 270 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:01:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2024-09-24 23:01:28,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 717. [2024-09-24 23:01:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 712 states have (on average 1.1432584269662922) internal successors, (814), 712 states have internal predecessors, (814), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 818 transitions. [2024-09-24 23:01:28,775 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 818 transitions. Word has length 75 [2024-09-24 23:01:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:01:28,776 INFO L474 AbstractCegarLoop]: Abstraction has 717 states and 818 transitions. [2024-09-24 23:01:28,776 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:28,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 818 transitions. [2024-09-24 23:01:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-24 23:01:28,777 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:01:28,777 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 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] [2024-09-24 23:01:28,789 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-24 23:01:28,977 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:01:28,978 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:01:28,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:28,978 INFO L85 PathProgramCache]: Analyzing trace with hash 846171212, now seen corresponding path program 8 times [2024-09-24 23:01:28,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:01:28,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681417262] [2024-09-24 23:01:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:01:28,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:01:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:29,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:01:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-24 23:01:29,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:01:29,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681417262] [2024-09-24 23:01:29,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681417262] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:01:29,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572428181] [2024-09-24 23:01:29,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:01:29,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:01:29,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:01:29,658 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:01:29,659 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-24 23:01:29,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:01:29,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:01:29,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-24 23:01:29,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:01:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-24 23:01:29,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:01:30,293 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-24 23:01:30,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 30 [2024-09-24 23:01:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-24 23:01:30,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572428181] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:01:30,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:01:30,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 29 [2024-09-24 23:01:30,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137742231] [2024-09-24 23:01:30,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:01:30,349 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-24 23:01:30,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:01:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-24 23:01:30,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2024-09-24 23:01:30,350 INFO L87 Difference]: Start difference. First operand 717 states and 818 transitions. Second operand has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:01:31,439 INFO L93 Difference]: Finished difference Result 1073 states and 1216 transitions. [2024-09-24 23:01:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-24 23:01:31,440 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2024-09-24 23:01:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:01:31,443 INFO L225 Difference]: With dead ends: 1073 [2024-09-24 23:01:31,443 INFO L226 Difference]: Without dead ends: 868 [2024-09-24 23:01:31,444 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2024-09-24 23:01:31,444 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 93 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:01:31,444 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 718 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:01:31,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2024-09-24 23:01:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 635. [2024-09-24 23:01:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 630 states have (on average 1.1476190476190475) internal successors, (723), 630 states have internal predecessors, (723), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 727 transitions. [2024-09-24 23:01:31,855 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 727 transitions. Word has length 76 [2024-09-24 23:01:31,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:01:31,855 INFO L474 AbstractCegarLoop]: Abstraction has 635 states and 727 transitions. [2024-09-24 23:01:31,855 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:31,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:31,855 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 727 transitions. [2024-09-24 23:01:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-24 23:01:31,856 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:01:31,856 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:01:31,870 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-24 23:01:32,057 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-24 23:01:32,057 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:01:32,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:32,058 INFO L85 PathProgramCache]: Analyzing trace with hash -984218334, now seen corresponding path program 9 times [2024-09-24 23:01:32,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:01:32,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887170497] [2024-09-24 23:01:32,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:01:32,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:01:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:32,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:01:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-24 23:01:32,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:01:32,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887170497] [2024-09-24 23:01:32,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887170497] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:01:32,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919870945] [2024-09-24 23:01:32,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:01:32,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:01:32,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:01:32,472 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:01:32,473 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-24 23:01:32,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 23:01:32,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:01:32,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-24 23:01:32,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:01:32,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2024-09-24 23:01:32,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-09-24 23:01:32,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 8 [2024-09-24 23:01:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-09-24 23:01:32,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:01:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-24 23:01:33,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919870945] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:01:33,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:01:33,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 11] total 26 [2024-09-24 23:01:33,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416615727] [2024-09-24 23:01:33,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:01:33,289 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-24 23:01:33,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:01:33,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-24 23:01:33,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2024-09-24 23:01:33,290 INFO L87 Difference]: Start difference. First operand 635 states and 727 transitions. Second operand has 26 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:01:34,169 INFO L93 Difference]: Finished difference Result 872 states and 1001 transitions. [2024-09-24 23:01:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-24 23:01:34,170 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2024-09-24 23:01:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:01:34,173 INFO L225 Difference]: With dead ends: 872 [2024-09-24 23:01:34,174 INFO L226 Difference]: Without dead ends: 867 [2024-09-24 23:01:34,174 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2024-09-24 23:01:34,174 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 114 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:01:34,175 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 428 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:01:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2024-09-24 23:01:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 656. [2024-09-24 23:01:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 651 states have (on average 1.1428571428571428) internal successors, (744), 651 states have internal predecessors, (744), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 748 transitions. [2024-09-24 23:01:34,614 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 748 transitions. Word has length 77 [2024-09-24 23:01:34,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:01:34,614 INFO L474 AbstractCegarLoop]: Abstraction has 656 states and 748 transitions. [2024-09-24 23:01:34,614 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:01:34,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:34,614 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 748 transitions. [2024-09-24 23:01:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-24 23:01:34,615 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:01:34,615 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:01:34,630 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-24 23:01:34,819 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-24 23:01:34,820 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:01:34,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:01:34,820 INFO L85 PathProgramCache]: Analyzing trace with hash 698766151, now seen corresponding path program 10 times [2024-09-24 23:01:34,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:01:34,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934766595] [2024-09-24 23:01:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:01:34,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:01:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:35,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:01:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:01:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-24 23:01:35,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:01:35,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934766595] [2024-09-24 23:01:35,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934766595] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:01:35,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78421715] [2024-09-24 23:01:35,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:01:35,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:01:35,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:01:35,028 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:01:35,029 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-24 23:01:35,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:01:35,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:01:35,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-09-24 23:01:35,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:01:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-09-24 23:01:35,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:01:37,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-24 23:01:37,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 84 [2024-09-24 23:01:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 39 proven. 75 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-24 23:01:40,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78421715] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:01:40,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:01:40,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20, 29] total 55 [2024-09-24 23:01:40,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644371298] [2024-09-24 23:01:40,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:01:40,480 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-24 23:01:40,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:01:40,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-24 23:01:40,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2024-09-24 23:01:40,481 INFO L87 Difference]: Start difference. First operand 656 states and 748 transitions. Second operand has 55 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 55 states have internal predecessors, (130), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:03:04,155 WARN L293 SmtUtils]: Spent 1.21m on a formula simplification. DAG size of input: 99 DAG size of output: 83 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)