./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/eureka_05.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/eureka_05.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 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 15:20:00,592 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 15:20:00,651 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 15:20:00,655 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 15:20:00,656 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 15:20:00,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 15:20:00,687 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 15:20:00,688 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 15:20:00,688 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 15:20:00,688 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 15:20:00,689 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 15:20:00,689 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 15:20:00,692 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 15:20:00,696 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 15:20:00,697 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 15:20:00,697 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 15:20:00,697 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 15:20:00,697 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 15:20:00,698 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 15:20:00,698 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 15:20:00,698 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 15:20:00,699 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 15:20:00,700 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 15:20:00,700 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 15:20:00,700 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 15:20:00,700 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 15:20:00,700 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 15:20:00,701 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 15:20:00,701 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 15:20:00,701 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 15:20:00,701 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 15:20:00,701 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 15:20:00,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:20:00,702 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 15:20:00,702 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 15:20:00,702 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 15:20:00,702 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 15:20:00,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 15:20:00,703 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 15:20:00,703 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 15:20:00,704 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 15:20:00,705 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 15:20:00,706 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 15:20:01,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 15:20:01,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 15:20:01,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 15:20:01,068 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 15:20:01,068 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 15:20:01,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/eureka_05.i [2024-09-12 15:20:02,639 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 15:20:02,861 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 15:20:02,862 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_05.i [2024-09-12 15:20:02,870 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/57aa0659e/6d2cfb6bc95549e0bf14c15bf3693a60/FLAG881d19f92 [2024-09-12 15:20:02,888 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/57aa0659e/6d2cfb6bc95549e0bf14c15bf3693a60 [2024-09-12 15:20:02,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 15:20:02,894 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 15:20:02,895 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 15:20:02,895 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 15:20:02,901 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 15:20:02,902 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:20:02" (1/1) ... [2024-09-12 15:20:02,903 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d033820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:02, skipping insertion in model container [2024-09-12 15:20:02,903 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:20:02" (1/1) ... [2024-09-12 15:20:02,923 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 15:20:03,086 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_05.i[810,823] [2024-09-12 15:20:03,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:20:03,128 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 15:20:03,141 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_05.i[810,823] [2024-09-12 15:20:03,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:20:03,172 INFO L204 MainTranslator]: Completed translation [2024-09-12 15:20:03,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03 WrapperNode [2024-09-12 15:20:03,173 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 15:20:03,175 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 15:20:03,175 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 15:20:03,175 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 15:20:03,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (1/1) ... [2024-09-12 15:20:03,190 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (1/1) ... [2024-09-12 15:20:03,203 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 15:20:03,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 15:20:03,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 15:20:03,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 15:20:03,205 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 15:20:03,216 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (1/1) ... [2024-09-12 15:20:03,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (1/1) ... [2024-09-12 15:20:03,219 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (1/1) ... [2024-09-12 15:20:03,238 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 2, 11]. 73 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5]. The 3 writes are split as follows [0, 1, 2]. [2024-09-12 15:20:03,241 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (1/1) ... [2024-09-12 15:20:03,241 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (1/1) ... [2024-09-12 15:20:03,247 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (1/1) ... [2024-09-12 15:20:03,255 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (1/1) ... [2024-09-12 15:20:03,259 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (1/1) ... [2024-09-12 15:20:03,260 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (1/1) ... [2024-09-12 15:20:03,266 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 15:20:03,267 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 15:20:03,271 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 15:20:03,271 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 15:20:03,272 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (1/1) ... [2024-09-12 15:20:03,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:20:03,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:03,307 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) [2024-09-12 15:20:03,310 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 [2024-09-12 15:20:03,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 15:20:03,366 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 15:20:03,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 15:20:03,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 15:20:03,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 15:20:03,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-12 15:20:03,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-12 15:20:03,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-12 15:20:03,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-12 15:20:03,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-12 15:20:03,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 15:20:03,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 15:20:03,369 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2024-09-12 15:20:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2024-09-12 15:20:03,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 15:20:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 15:20:03,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-12 15:20:03,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-12 15:20:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-12 15:20:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 15:20:03,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 15:20:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-12 15:20:03,469 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 15:20:03,472 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 15:20:03,673 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-12 15:20:03,674 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 15:20:03,704 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 15:20:03,705 INFO L318 CfgBuilder]: Removed 4 assume(true) statements. [2024-09-12 15:20:03,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:20:03 BoogieIcfgContainer [2024-09-12 15:20:03,705 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 15:20:03,707 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 15:20:03,707 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 15:20:03,711 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 15:20:03,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 03:20:02" (1/3) ... [2024-09-12 15:20:03,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14be1847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:20:03, skipping insertion in model container [2024-09-12 15:20:03,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:20:03" (2/3) ... [2024-09-12 15:20:03,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14be1847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:20:03, skipping insertion in model container [2024-09-12 15:20:03,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:20:03" (3/3) ... [2024-09-12 15:20:03,717 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2024-09-12 15:20:03,735 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 15:20:03,735 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 15:20:03,787 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 15:20:03,794 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;@f070e59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 15:20:03,794 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 15:20:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:20:03,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 15:20:03,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:03,807 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:03,808 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:03,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2080310768, now seen corresponding path program 1 times [2024-09-12 15:20:03,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:03,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765145039] [2024-09-12 15:20:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:03,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:04,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:04,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:20:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:20:04,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:04,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765145039] [2024-09-12 15:20:04,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765145039] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:20:04,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:20:04,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 15:20:04,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975817354] [2024-09-12 15:20:04,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:20:04,115 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 15:20:04,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 15:20:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 15:20:04,146 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:20:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:04,377 INFO L93 Difference]: Finished difference Result 65 states and 92 transitions. [2024-09-12 15:20:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:20:04,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-12 15:20:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:04,389 INFO L225 Difference]: With dead ends: 65 [2024-09-12 15:20:04,390 INFO L226 Difference]: Without dead ends: 36 [2024-09-12 15:20:04,398 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:20:04,402 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:04,404 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 7 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:20:04,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-12 15:20:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2024-09-12 15:20:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:20:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-09-12 15:20:04,450 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2024-09-12 15:20:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:04,450 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-09-12 15:20:04,451 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:20:04,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-09-12 15:20:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 15:20:04,452 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:04,452 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:04,453 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 15:20:04,453 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:04,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:04,454 INFO L85 PathProgramCache]: Analyzing trace with hash 156377847, now seen corresponding path program 1 times [2024-09-12 15:20:04,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:04,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260817512] [2024-09-12 15:20:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:04,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:04,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:04,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:20:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:20:04,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:04,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260817512] [2024-09-12 15:20:04,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260817512] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:20:04,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:20:04,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:20:04,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969552527] [2024-09-12 15:20:04,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:20:04,648 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:20:04,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:04,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:20:04,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:20:04,649 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:20:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:04,827 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2024-09-12 15:20:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:20:04,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-12 15:20:04,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:04,832 INFO L225 Difference]: With dead ends: 56 [2024-09-12 15:20:04,832 INFO L226 Difference]: Without dead ends: 37 [2024-09-12 15:20:04,833 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-12 15:20:04,834 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:04,838 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 5 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:20:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-12 15:20:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2024-09-12 15:20:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:20:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-12 15:20:04,858 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2024-09-12 15:20:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:04,860 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-12 15:20:04,860 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:20:04,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:04,861 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-12 15:20:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-12 15:20:04,862 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:04,862 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:04,862 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 15:20:04,863 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:04,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:04,864 INFO L85 PathProgramCache]: Analyzing trace with hash 364897058, now seen corresponding path program 1 times [2024-09-12 15:20:04,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:04,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261182534] [2024-09-12 15:20:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:04,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:04,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:04,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-12 15:20:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:20:04,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:04,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261182534] [2024-09-12 15:20:04,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261182534] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:04,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040033690] [2024-09-12 15:20:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:04,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:04,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:04,983 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) [2024-09-12 15:20:04,985 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 15:20:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:05,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-12 15:20:05,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:20:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:20:05,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:20:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:20:05,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040033690] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:20:05,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:20:05,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2024-09-12 15:20:05,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097473803] [2024-09-12 15:20:05,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:20:05,136 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 15:20:05,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:05,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 15:20:05,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:20:05,138 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:20:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:05,403 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-12 15:20:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 15:20:05,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2024-09-12 15:20:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:05,405 INFO L225 Difference]: With dead ends: 65 [2024-09-12 15:20:05,405 INFO L226 Difference]: Without dead ends: 46 [2024-09-12 15:20:05,406 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:20:05,407 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:05,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 7 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:20:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-12 15:20:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2024-09-12 15:20:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:20:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-09-12 15:20:05,424 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2024-09-12 15:20:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:05,424 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-09-12 15:20:05,424 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:20:05,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:05,425 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-09-12 15:20:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-12 15:20:05,425 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:05,425 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:05,442 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 15:20:05,631 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 [2024-09-12 15:20:05,632 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:05,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:05,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1764338249, now seen corresponding path program 2 times [2024-09-12 15:20:05,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:05,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697534989] [2024-09-12 15:20:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:05,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:05,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:05,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:20:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 15:20:05,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:05,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697534989] [2024-09-12 15:20:05,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697534989] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:20:05,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:20:05,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-12 15:20:05,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198640414] [2024-09-12 15:20:05,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:20:05,801 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 15:20:05,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:05,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 15:20:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-12 15:20:05,806 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:20:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:05,975 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-09-12 15:20:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 15:20:05,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2024-09-12 15:20:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:05,977 INFO L225 Difference]: With dead ends: 46 [2024-09-12 15:20:05,977 INFO L226 Difference]: Without dead ends: 34 [2024-09-12 15:20:05,977 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-09-12 15:20:05,979 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 75 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:05,981 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 7 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:20:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-12 15:20:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-09-12 15:20:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:20:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-09-12 15:20:05,996 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2024-09-12 15:20:05,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:05,997 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-09-12 15:20:05,997 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:20:05,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:05,998 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-09-12 15:20:05,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 15:20:05,998 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:05,999 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:05,999 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-12 15:20:05,999 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:05,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:05,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1674322940, now seen corresponding path program 1 times [2024-09-12 15:20:06,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:06,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050276377] [2024-09-12 15:20:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:06,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:06,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:06,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:20:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 15:20:06,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:06,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050276377] [2024-09-12 15:20:06,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050276377] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:06,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819082539] [2024-09-12 15:20:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:06,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:06,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:06,160 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) [2024-09-12 15:20:06,164 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 15:20:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:06,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 15:20:06,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:20:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 15:20:06,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:20:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 15:20:06,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819082539] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:20:06,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:20:06,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-12 15:20:06,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764176512] [2024-09-12 15:20:06,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:20:06,377 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 15:20:06,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:06,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 15:20:06,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:20:06,378 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:20:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:06,905 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-09-12 15:20:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 15:20:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2024-09-12 15:20:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:06,907 INFO L225 Difference]: With dead ends: 70 [2024-09-12 15:20:06,907 INFO L226 Difference]: Without dead ends: 50 [2024-09-12 15:20:06,908 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2024-09-12 15:20:06,908 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 109 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:06,909 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 13 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:20:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-12 15:20:06,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2024-09-12 15:20:06,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:20:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-12 15:20:06,925 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2024-09-12 15:20:06,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:06,926 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-12 15:20:06,926 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:20:06,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-12 15:20:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-12 15:20:06,927 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:06,927 INFO L216 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:06,945 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 15:20:07,128 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:07,129 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:07,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2009987497, now seen corresponding path program 1 times [2024-09-12 15:20:07,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:07,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034703863] [2024-09-12 15:20:07,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:07,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:07,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:07,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:20:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 15:20:07,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:07,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034703863] [2024-09-12 15:20:07,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034703863] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:07,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731662406] [2024-09-12 15:20:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:07,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:07,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:07,247 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) [2024-09-12 15:20:07,248 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 15:20:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:07,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-12 15:20:07,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:20:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 15:20:07,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:20:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 15:20:07,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731662406] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:20:07,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:20:07,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2024-09-12 15:20:07,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384710241] [2024-09-12 15:20:07,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:20:07,565 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 15:20:07,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:07,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 15:20:07,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-09-12 15:20:07,566 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:20:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:08,120 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2024-09-12 15:20:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:20:08,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2024-09-12 15:20:08,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:08,123 INFO L225 Difference]: With dead ends: 83 [2024-09-12 15:20:08,124 INFO L226 Difference]: Without dead ends: 66 [2024-09-12 15:20:08,124 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 15:20:08,125 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 290 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:08,125 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 13 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:20:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-12 15:20:08,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-09-12 15:20:08,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 54 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:20:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-12 15:20:08,145 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 28 [2024-09-12 15:20:08,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:08,145 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-12 15:20:08,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:20:08,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-12 15:20:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 15:20:08,147 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:08,148 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:08,164 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 15:20:08,348 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 15:20:08,349 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:08,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:08,349 INFO L85 PathProgramCache]: Analyzing trace with hash 752690779, now seen corresponding path program 2 times [2024-09-12 15:20:08,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:08,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443487569] [2024-09-12 15:20:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:08,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:08,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:08,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:20:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-12 15:20:08,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:08,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443487569] [2024-09-12 15:20:08,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443487569] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:08,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617958993] [2024-09-12 15:20:08,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:20:08,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:08,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:08,605 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) [2024-09-12 15:20:08,607 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 15:20:08,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:20:08,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:20:08,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 15:20:08,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:20:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-12 15:20:08,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:20:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-12 15:20:09,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617958993] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:20:09,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:20:09,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 19 [2024-09-12 15:20:09,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483133189] [2024-09-12 15:20:09,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:20:09,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 15:20:09,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 15:20:09,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-09-12 15:20:09,145 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:20:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:09,404 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2024-09-12 15:20:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 15:20:09,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2024-09-12 15:20:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:09,405 INFO L225 Difference]: With dead ends: 84 [2024-09-12 15:20:09,406 INFO L226 Difference]: Without dead ends: 72 [2024-09-12 15:20:09,406 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2024-09-12 15:20:09,407 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 137 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:09,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 8 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:20:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-12 15:20:09,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-12 15:20:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:20:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2024-09-12 15:20:09,426 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 58 [2024-09-12 15:20:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:09,427 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2024-09-12 15:20:09,427 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:20:09,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2024-09-12 15:20:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 15:20:09,429 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:09,429 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:09,449 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 15:20:09,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:09,631 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:09,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1101248827, now seen corresponding path program 3 times [2024-09-12 15:20:09,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:09,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121141277] [2024-09-12 15:20:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:09,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:09,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:09,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:20:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-12 15:20:09,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:09,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121141277] [2024-09-12 15:20:09,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121141277] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:09,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371450541] [2024-09-12 15:20:09,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:20:09,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:09,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:09,905 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) [2024-09-12 15:20:09,906 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 15:20:09,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 15:20:09,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:20:09,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 15:20:09,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:20:10,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 15:20:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-09-12 15:20:10,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:20:10,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371450541] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:20:10,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:20:10,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2024-09-12 15:20:10,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463459310] [2024-09-12 15:20:10,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:20:10,330 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 15:20:10,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:10,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 15:20:10,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2024-09-12 15:20:10,332 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:20:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:10,512 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2024-09-12 15:20:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 15:20:10,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2024-09-12 15:20:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:10,514 INFO L225 Difference]: With dead ends: 81 [2024-09-12 15:20:10,515 INFO L226 Difference]: Without dead ends: 79 [2024-09-12 15:20:10,516 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-09-12 15:20:10,517 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:10,517 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 107 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:20:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-12 15:20:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2024-09-12 15:20:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 69 states have internal predecessors, (87), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:20:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2024-09-12 15:20:10,548 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 64 [2024-09-12 15:20:10,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:10,550 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2024-09-12 15:20:10,550 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:20:10,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2024-09-12 15:20:10,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-12 15:20:10,555 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:10,556 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:10,574 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 15:20:10,756 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-12 15:20:10,757 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:10,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:10,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2042194420, now seen corresponding path program 1 times [2024-09-12 15:20:10,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:10,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102966561] [2024-09-12 15:20:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:10,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:10,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:10,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:20:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:11,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:20:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 2 proven. 147 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:20:11,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:11,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102966561] [2024-09-12 15:20:11,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102966561] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:11,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629120416] [2024-09-12 15:20:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:11,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:11,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:11,086 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) [2024-09-12 15:20:11,088 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 15:20:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:11,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 15:20:11,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:20:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 27 proven. 120 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:20:11,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:20:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 29 proven. 120 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:20:11,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629120416] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:20:11,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:20:11,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 21 [2024-09-12 15:20:11,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290053865] [2024-09-12 15:20:11,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:20:11,676 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 15:20:11,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:11,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 15:20:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:20:11,677 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 19 states have internal predecessors, (89), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:20:12,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:12,097 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2024-09-12 15:20:12,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:20:12,098 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 19 states have internal predecessors, (89), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 71 [2024-09-12 15:20:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:12,100 INFO L225 Difference]: With dead ends: 106 [2024-09-12 15:20:12,100 INFO L226 Difference]: Without dead ends: 81 [2024-09-12 15:20:12,101 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:20:12,101 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 168 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:12,102 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 10 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:20:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-12 15:20:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-09-12 15:20:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 70 states have internal predecessors, (88), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:20:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-09-12 15:20:12,129 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 71 [2024-09-12 15:20:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:12,129 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-09-12 15:20:12,130 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 19 states have internal predecessors, (89), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:20:12,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-09-12 15:20:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-12 15:20:12,131 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:12,131 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:12,147 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 15:20:12,332 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:12,332 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:12,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:12,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2083039638, now seen corresponding path program 2 times [2024-09-12 15:20:12,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:12,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790259369] [2024-09-12 15:20:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:12,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:12,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:12,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:20:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:13,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:20:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-09-12 15:20:13,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:13,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790259369] [2024-09-12 15:20:13,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790259369] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:13,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699778996] [2024-09-12 15:20:13,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:20:13,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:13,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:13,271 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) [2024-09-12 15:20:13,273 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 15:20:13,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:20:13,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:20:13,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 15:20:13,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:20:13,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:20:13,458 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 15 treesize of output 7 [2024-09-12 15:20:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-12 15:20:13,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:20:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2024-09-12 15:20:14,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699778996] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:20:14,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:20:14,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2024-09-12 15:20:14,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552802719] [2024-09-12 15:20:14,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:20:14,173 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 15:20:14,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:14,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 15:20:14,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:20:14,175 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 26 states have internal predecessors, (75), 5 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-12 15:20:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:14,778 INFO L93 Difference]: Finished difference Result 153 states and 187 transitions. [2024-09-12 15:20:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 15:20:14,779 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 26 states have internal predecessors, (75), 5 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 74 [2024-09-12 15:20:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:14,781 INFO L225 Difference]: With dead ends: 153 [2024-09-12 15:20:14,782 INFO L226 Difference]: Without dead ends: 93 [2024-09-12 15:20:14,783 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 15:20:14,784 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 135 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:14,784 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 4 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:20:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-12 15:20:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2024-09-12 15:20:14,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 73 states have internal predecessors, (91), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:20:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2024-09-12 15:20:14,820 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 74 [2024-09-12 15:20:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:14,820 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2024-09-12 15:20:14,820 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 26 states have internal predecessors, (75), 5 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-12 15:20:14,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2024-09-12 15:20:14,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-12 15:20:14,822 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:14,822 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:14,839 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 15:20:15,022 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:15,023 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:15,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:15,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2123714388, now seen corresponding path program 1 times [2024-09-12 15:20:15,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:15,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453512138] [2024-09-12 15:20:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:15,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:15,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:15,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:20:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:16,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:20:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 119 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-09-12 15:20:16,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:16,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453512138] [2024-09-12 15:20:16,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453512138] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:16,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433861649] [2024-09-12 15:20:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:16,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:16,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:16,604 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) [2024-09-12 15:20:16,605 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 15:20:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:16,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-12 15:20:16,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:20:16,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:20:16,816 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 15 treesize of output 7 [2024-09-12 15:20:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-09-12 15:20:17,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:20:18,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433861649] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:18,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:20:18,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 37 [2024-09-12 15:20:18,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817860137] [2024-09-12 15:20:18,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:20:18,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-12 15:20:18,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:18,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-12 15:20:18,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:20:18,016 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 34 states have internal predecessors, (73), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:20:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:21,742 INFO L93 Difference]: Finished difference Result 308 states and 421 transitions. [2024-09-12 15:20:21,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-12 15:20:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 34 states have internal predecessors, (73), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2024-09-12 15:20:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:21,745 INFO L225 Difference]: With dead ends: 308 [2024-09-12 15:20:21,745 INFO L226 Difference]: Without dead ends: 251 [2024-09-12 15:20:21,747 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1277, Invalid=7465, Unknown=0, NotChecked=0, Total=8742 [2024-09-12 15:20:21,748 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 255 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:21,748 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 17 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 15:20:21,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-12 15:20:21,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 177. [2024-09-12 15:20:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 167 states have (on average 1.4191616766467066) internal successors, (237), 168 states have internal predecessors, (237), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:20:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 246 transitions. [2024-09-12 15:20:21,828 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 246 transitions. Word has length 74 [2024-09-12 15:20:21,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:21,828 INFO L474 AbstractCegarLoop]: Abstraction has 177 states and 246 transitions. [2024-09-12 15:20:21,829 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 34 states have internal predecessors, (73), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:20:21,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 246 transitions. [2024-09-12 15:20:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-12 15:20:21,831 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:21,831 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:21,848 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 15:20:22,035 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:22,036 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:22,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1727352234, now seen corresponding path program 2 times [2024-09-12 15:20:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:22,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985381598] [2024-09-12 15:20:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:22,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:22,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:22,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:20:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:24,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:20:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 15:20:24,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:24,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985381598] [2024-09-12 15:20:24,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985381598] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:24,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431006256] [2024-09-12 15:20:24,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:20:24,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:24,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:24,078 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) [2024-09-12 15:20:24,079 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 15:20:24,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:20:24,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:20:24,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:20:24,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:20:24,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:20:24,242 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 15 treesize of output 7 [2024-09-12 15:20:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-09-12 15:20:24,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:20:25,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431006256] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:25,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:20:25,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 13] total 42 [2024-09-12 15:20:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610736463] [2024-09-12 15:20:25,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:20:25,005 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 15:20:25,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 15:20:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 15:20:25,006 INFO L87 Difference]: Start difference. First operand 177 states and 246 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 39 states have internal predecessors, (84), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:20:29,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:29,383 INFO L93 Difference]: Finished difference Result 532 states and 764 transitions. [2024-09-12 15:20:29,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-12 15:20:29,384 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 39 states have internal predecessors, (84), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2024-09-12 15:20:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:29,386 INFO L225 Difference]: With dead ends: 532 [2024-09-12 15:20:29,386 INFO L226 Difference]: Without dead ends: 374 [2024-09-12 15:20:29,392 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4558 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2068, Invalid=12938, Unknown=0, NotChecked=0, Total=15006 [2024-09-12 15:20:29,393 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 461 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:29,394 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 22 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 15:20:29,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-09-12 15:20:29,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 269. [2024-09-12 15:20:29,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 259 states have (on average 1.4517374517374517) internal successors, (376), 260 states have internal predecessors, (376), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:20:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 385 transitions. [2024-09-12 15:20:29,554 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 385 transitions. Word has length 74 [2024-09-12 15:20:29,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:29,554 INFO L474 AbstractCegarLoop]: Abstraction has 269 states and 385 transitions. [2024-09-12 15:20:29,554 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 39 states have internal predecessors, (84), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:20:29,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 385 transitions. [2024-09-12 15:20:29,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-12 15:20:29,556 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:29,556 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:29,569 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 15:20:29,757 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-12 15:20:29,757 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:29,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:29,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1688407464, now seen corresponding path program 3 times [2024-09-12 15:20:29,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:29,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323064597] [2024-09-12 15:20:29,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:29,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:30,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:30,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:20:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:32,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:20:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 15:20:32,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:32,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323064597] [2024-09-12 15:20:32,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323064597] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:32,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304904500] [2024-09-12 15:20:32,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:20:32,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:32,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:32,094 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) [2024-09-12 15:20:32,105 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 15:20:32,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 15:20:32,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:20:32,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:20:32,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:20:32,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-09-12 15:20:32,221 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 30 treesize of output 29 [2024-09-12 15:20:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-12 15:20:32,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:20:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-12 15:20:32,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304904500] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:20:32,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:20:32,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 11, 10] total 49 [2024-09-12 15:20:32,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030942322] [2024-09-12 15:20:32,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:20:32,957 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-12 15:20:32,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-12 15:20:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2151, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 15:20:32,959 INFO L87 Difference]: Start difference. First operand 269 states and 385 transitions. Second operand has 49 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 9 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-12 15:20:36,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:36,796 INFO L93 Difference]: Finished difference Result 466 states and 651 transitions. [2024-09-12 15:20:36,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-09-12 15:20:36,796 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 9 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 74 [2024-09-12 15:20:36,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:36,799 INFO L225 Difference]: With dead ends: 466 [2024-09-12 15:20:36,799 INFO L226 Difference]: Without dead ends: 416 [2024-09-12 15:20:36,802 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1199, Invalid=10791, Unknown=0, NotChecked=0, Total=11990 [2024-09-12 15:20:36,802 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 240 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:36,802 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 20 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 15:20:36,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2024-09-12 15:20:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 319. [2024-09-12 15:20:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 307 states have (on average 1.4234527687296417) internal successors, (437), 308 states have internal predecessors, (437), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:20:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 448 transitions. [2024-09-12 15:20:36,948 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 448 transitions. Word has length 74 [2024-09-12 15:20:36,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:36,948 INFO L474 AbstractCegarLoop]: Abstraction has 319 states and 448 transitions. [2024-09-12 15:20:36,949 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 9 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-12 15:20:36,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 448 transitions. [2024-09-12 15:20:36,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-12 15:20:36,950 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:36,950 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:36,967 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 15:20:37,151 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-12 15:20:37,151 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:37,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:37,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1248576269, now seen corresponding path program 4 times [2024-09-12 15:20:37,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:37,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963646749] [2024-09-12 15:20:37,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:37,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:37,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:37,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:20:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:38,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:20:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:38,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:20:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-09-12 15:20:38,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:38,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963646749] [2024-09-12 15:20:38,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963646749] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:38,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359039227] [2024-09-12 15:20:38,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:20:38,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:38,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:38,581 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) [2024-09-12 15:20:38,583 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 15:20:38,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:20:38,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:20:38,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-12 15:20:38,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:20:38,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:20:38,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 17 [2024-09-12 15:20:39,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:20:39,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 33 [2024-09-12 15:20:39,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:20:39,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 33 [2024-09-12 15:20:39,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:20:39,232 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 36 treesize of output 12 [2024-09-12 15:20:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 49 proven. 165 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 15:20:39,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:20:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 145 proven. 51 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-12 15:20:39,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359039227] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:20:39,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:20:39,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 14] total 51 [2024-09-12 15:20:39,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583403878] [2024-09-12 15:20:39,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:20:39,742 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-12 15:20:39,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:39,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-12 15:20:39,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2370, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 15:20:39,744 INFO L87 Difference]: Start difference. First operand 319 states and 448 transitions. Second operand has 51 states, 51 states have (on average 2.4705882352941178) internal successors, (126), 49 states have internal predecessors, (126), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-12 15:20:48,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:20:48,840 INFO L93 Difference]: Finished difference Result 1288 states and 1838 transitions. [2024-09-12 15:20:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2024-09-12 15:20:48,840 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.4705882352941178) internal successors, (126), 49 states have internal predecessors, (126), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 81 [2024-09-12 15:20:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:20:48,845 INFO L225 Difference]: With dead ends: 1288 [2024-09-12 15:20:48,845 INFO L226 Difference]: Without dead ends: 1023 [2024-09-12 15:20:48,849 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11173 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2783, Invalid=29797, Unknown=0, NotChecked=0, Total=32580 [2024-09-12 15:20:48,850 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 844 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:20:48,851 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 26 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3016 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-12 15:20:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2024-09-12 15:20:49,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 568. [2024-09-12 15:20:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 556 states have (on average 1.4550359712230216) internal successors, (809), 557 states have internal predecessors, (809), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:20:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 820 transitions. [2024-09-12 15:20:49,185 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 820 transitions. Word has length 81 [2024-09-12 15:20:49,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:20:49,185 INFO L474 AbstractCegarLoop]: Abstraction has 568 states and 820 transitions. [2024-09-12 15:20:49,186 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.4705882352941178) internal successors, (126), 49 states have internal predecessors, (126), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-12 15:20:49,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:49,186 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 820 transitions. [2024-09-12 15:20:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-12 15:20:49,188 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:20:49,188 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:20:49,201 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-12 15:20:49,388 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 15:20:49,388 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:20:49,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:20:49,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1736737935, now seen corresponding path program 5 times [2024-09-12 15:20:49,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:20:49,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487258625] [2024-09-12 15:20:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:20:49,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:20:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:49,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:20:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:49,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:20:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:50,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:20:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:50,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:20:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:20:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 82 proven. 133 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 15:20:50,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:20:50,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487258625] [2024-09-12 15:20:50,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487258625] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:20:50,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061104211] [2024-09-12 15:20:50,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:20:50,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:20:50,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:20:50,826 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) [2024-09-12 15:20:50,827 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 15:20:50,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-12 15:20:50,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:20:50,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-12 15:20:50,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:20:51,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:20:51,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 41 [2024-09-12 15:20:51,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:20:51,260 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 48 treesize of output 12 [2024-09-12 15:20:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 148 proven. 46 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-12 15:20:51,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:20:51,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 93 [2024-09-12 15:20:51,867 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-09-12 15:20:51,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 113 treesize of output 112 [2024-09-12 15:20:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 158 proven. 30 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-12 15:20:52,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061104211] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:20:52,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:20:52,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16, 14] total 54 [2024-09-12 15:20:52,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927670171] [2024-09-12 15:20:52,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:20:52,112 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-12 15:20:52,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:20:52,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-12 15:20:52,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2593, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:20:52,114 INFO L87 Difference]: Start difference. First operand 568 states and 820 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 52 states have internal predecessors, (110), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-12 15:21:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:21:02,148 INFO L93 Difference]: Finished difference Result 1950 states and 2785 transitions. [2024-09-12 15:21:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2024-09-12 15:21:02,149 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 52 states have internal predecessors, (110), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 81 [2024-09-12 15:21:02,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:21:02,157 INFO L225 Difference]: With dead ends: 1950 [2024-09-12 15:21:02,157 INFO L226 Difference]: Without dead ends: 1648 [2024-09-12 15:21:02,162 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15196 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=4514, Invalid=40218, Unknown=0, NotChecked=0, Total=44732 [2024-09-12 15:21:02,163 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 333 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 3029 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:21:02,163 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 34 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3029 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-12 15:21:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2024-09-12 15:21:02,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1046. [2024-09-12 15:21:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1034 states have (on average 1.369439071566731) internal successors, (1416), 1035 states have internal predecessors, (1416), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:21:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1427 transitions. [2024-09-12 15:21:02,945 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1427 transitions. Word has length 81 [2024-09-12 15:21:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:21:02,946 INFO L474 AbstractCegarLoop]: Abstraction has 1046 states and 1427 transitions. [2024-09-12 15:21:02,946 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 52 states have internal predecessors, (110), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-12 15:21:02,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:21:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1427 transitions. [2024-09-12 15:21:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-12 15:21:02,950 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:21:02,950 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:21:02,966 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-12 15:21:03,150 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 15:21:03,150 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:21:03,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:21:03,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1342371149, now seen corresponding path program 6 times [2024-09-12 15:21:03,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:21:03,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692182641] [2024-09-12 15:21:03,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:21:03,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:21:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:03,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:21:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:03,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:21:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:03,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:21:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:03,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:21:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 4 proven. 126 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-12 15:21:03,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:21:03,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692182641] [2024-09-12 15:21:03,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692182641] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:21:03,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492049561] [2024-09-12 15:21:03,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:21:03,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:21:03,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:21:03,773 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) [2024-09-12 15:21:03,774 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 15:21:03,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 15:21:03,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:21:03,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:21:03,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:21:03,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:21:03,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2024-09-12 15:21:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-09-12 15:21:04,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:21:04,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492049561] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:21:04,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:21:04,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2024-09-12 15:21:04,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107688981] [2024-09-12 15:21:04,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:21:04,296 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 15:21:04,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:21:04,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 15:21:04,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2024-09-12 15:21:04,297 INFO L87 Difference]: Start difference. First operand 1046 states and 1427 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 19 states have internal predecessors, (62), 4 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:21:05,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:21:05,978 INFO L93 Difference]: Finished difference Result 2690 states and 3701 transitions. [2024-09-12 15:21:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 15:21:05,978 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 19 states have internal predecessors, (62), 4 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 81 [2024-09-12 15:21:05,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:21:05,984 INFO L225 Difference]: With dead ends: 2690 [2024-09-12 15:21:05,984 INFO L226 Difference]: Without dead ends: 790 [2024-09-12 15:21:05,987 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 15:21:05,987 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 129 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:21:05,988 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 5 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:21:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2024-09-12 15:21:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 790. [2024-09-12 15:21:06,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 778 states have (on average 1.3907455012853471) internal successors, (1082), 779 states have internal predecessors, (1082), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:21:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1093 transitions. [2024-09-12 15:21:06,490 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1093 transitions. Word has length 81 [2024-09-12 15:21:06,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:21:06,491 INFO L474 AbstractCegarLoop]: Abstraction has 790 states and 1093 transitions. [2024-09-12 15:21:06,491 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 19 states have internal predecessors, (62), 4 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:21:06,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:21:06,491 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1093 transitions. [2024-09-12 15:21:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-12 15:21:06,493 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:21:06,493 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:21:06,508 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-12 15:21:06,694 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 15:21:06,694 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:21:06,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:21:06,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1136122385, now seen corresponding path program 7 times [2024-09-12 15:21:06,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:21:06,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461602038] [2024-09-12 15:21:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:21:06,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:21:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:07,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:21:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:07,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:21:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:07,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:21:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:07,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:21:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 46 proven. 136 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-12 15:21:07,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:21:07,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461602038] [2024-09-12 15:21:07,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461602038] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:21:07,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847924644] [2024-09-12 15:21:07,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:21:07,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:21:07,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:21:07,837 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) [2024-09-12 15:21:07,839 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 15:21:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:07,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:21:07,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:21:08,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:21:08,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 27 [2024-09-12 15:21:08,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:21:08,310 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 28 treesize of output 12 [2024-09-12 15:21:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 49 proven. 134 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-09-12 15:21:08,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:21:08,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 93 [2024-09-12 15:21:08,611 INFO L349 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2024-09-12 15:21:08,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 105 treesize of output 112 [2024-09-12 15:21:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 130 proven. 9 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-09-12 15:21:08,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847924644] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:21:08,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:21:08,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 10] total 42 [2024-09-12 15:21:08,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243411272] [2024-09-12 15:21:08,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:21:08,832 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 15:21:08,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:21:08,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 15:21:08,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1578, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:21:08,833 INFO L87 Difference]: Start difference. First operand 790 states and 1093 transitions. Second operand has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 40 states have internal predecessors, (108), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-12 15:21:12,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:21:12,128 INFO L93 Difference]: Finished difference Result 1707 states and 2354 transitions. [2024-09-12 15:21:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-09-12 15:21:12,129 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 40 states have internal predecessors, (108), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 81 [2024-09-12 15:21:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:21:12,136 INFO L225 Difference]: With dead ends: 1707 [2024-09-12 15:21:12,136 INFO L226 Difference]: Without dead ends: 1040 [2024-09-12 15:21:12,139 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2314 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=869, Invalid=7687, Unknown=0, NotChecked=0, Total=8556 [2024-09-12 15:21:12,140 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 302 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:21:12,140 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 15 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 15:21:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2024-09-12 15:21:12,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 863. [2024-09-12 15:21:12,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 851 states have (on average 1.3748531139835487) internal successors, (1170), 852 states have internal predecessors, (1170), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:21:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1181 transitions. [2024-09-12 15:21:12,782 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1181 transitions. Word has length 81 [2024-09-12 15:21:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:21:12,782 INFO L474 AbstractCegarLoop]: Abstraction has 863 states and 1181 transitions. [2024-09-12 15:21:12,783 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 40 states have internal predecessors, (108), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-12 15:21:12,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:21:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1181 transitions. [2024-09-12 15:21:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-12 15:21:12,785 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:21:12,786 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:21:12,803 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-12 15:21:12,986 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-12 15:21:12,986 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:21:12,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:21:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2052240977, now seen corresponding path program 8 times [2024-09-12 15:21:12,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:21:12,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521272689] [2024-09-12 15:21:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:21:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:21:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:13,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:21:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:13,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:21:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:14,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:21:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:14,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:21:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 9 proven. 202 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-12 15:21:14,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:21:14,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521272689] [2024-09-12 15:21:14,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521272689] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:21:14,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133262947] [2024-09-12 15:21:14,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:21:14,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:21:14,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:21:14,611 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) [2024-09-12 15:21:14,612 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 15:21:14,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:21:14,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:21:14,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-12 15:21:14,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:21:14,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:21:14,793 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 15 treesize of output 7 [2024-09-12 15:21:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 15:21:15,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:21:16,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133262947] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:21:16,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:21:16,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 44 [2024-09-12 15:21:16,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274939593] [2024-09-12 15:21:16,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:21:16,019 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:21:16,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:21:16,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:21:16,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1802, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:21:16,020 INFO L87 Difference]: Start difference. First operand 863 states and 1181 transitions. Second operand has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 41 states have internal predecessors, (103), 4 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:21:29,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:21:29,590 INFO L93 Difference]: Finished difference Result 3464 states and 4829 transitions. [2024-09-12 15:21:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-09-12 15:21:29,590 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 41 states have internal predecessors, (103), 4 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 81 [2024-09-12 15:21:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:21:29,598 INFO L225 Difference]: With dead ends: 3464 [2024-09-12 15:21:29,598 INFO L226 Difference]: Without dead ends: 1944 [2024-09-12 15:21:29,621 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11769 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=3323, Invalid=28897, Unknown=0, NotChecked=0, Total=32220 [2024-09-12 15:21:29,622 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 525 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:21:29,622 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 5 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-12 15:21:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2024-09-12 15:21:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1563. [2024-09-12 15:21:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1551 states have (on average 1.38749194068343) internal successors, (2152), 1552 states have internal predecessors, (2152), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:21:30,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2163 transitions. [2024-09-12 15:21:30,842 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2163 transitions. Word has length 81 [2024-09-12 15:21:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:21:30,842 INFO L474 AbstractCegarLoop]: Abstraction has 1563 states and 2163 transitions. [2024-09-12 15:21:30,842 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 41 states have internal predecessors, (103), 4 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:21:30,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:21:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2163 transitions. [2024-09-12 15:21:30,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-12 15:21:30,846 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:21:30,846 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:21:30,863 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-12 15:21:31,047 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-12 15:21:31,047 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:21:31,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:21:31,047 INFO L85 PathProgramCache]: Analyzing trace with hash 184241557, now seen corresponding path program 9 times [2024-09-12 15:21:31,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:21:31,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923067044] [2024-09-12 15:21:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:21:31,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:21:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:31,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:21:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:31,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:21:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:33,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:21:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:33,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:21:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 10 proven. 212 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 15:21:33,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:21:33,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923067044] [2024-09-12 15:21:33,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923067044] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:21:33,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259389062] [2024-09-12 15:21:33,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:21:33,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:21:33,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:21:33,423 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) [2024-09-12 15:21:33,424 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 15:21:33,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 15:21:33,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:21:33,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:21:33,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:21:33,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 15:21:33,644 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-09-12 15:21:33,644 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 1 case distinctions, treesize of input 21 treesize of output 20 [2024-09-12 15:21:33,707 INFO L349 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2024-09-12 15:21:33,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2024-09-12 15:21:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-09-12 15:21:34,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:21:35,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 14 [2024-09-12 15:21:35,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-12 15:21:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2024-09-12 15:21:35,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259389062] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:21:35,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:21:35,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 15, 14] total 58 [2024-09-12 15:21:35,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5131008] [2024-09-12 15:21:35,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:21:35,107 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-12 15:21:35,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:21:35,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-12 15:21:35,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3048, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 15:21:35,108 INFO L87 Difference]: Start difference. First operand 1563 states and 2163 transitions. Second operand has 58 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 11 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-12 15:21:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:21:50,749 INFO L93 Difference]: Finished difference Result 2963 states and 4108 transitions. [2024-09-12 15:21:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-09-12 15:21:50,750 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 11 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 81 [2024-09-12 15:21:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:21:50,761 INFO L225 Difference]: With dead ends: 2963 [2024-09-12 15:21:50,761 INFO L226 Difference]: Without dead ends: 2618 [2024-09-12 15:21:50,764 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 139 SyntacticMatches, 9 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11932 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=4270, Invalid=32402, Unknown=0, NotChecked=0, Total=36672 [2024-09-12 15:21:50,764 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 313 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3131 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 3261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 3131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:21:50,765 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 30 Invalid, 3261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 3131 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-12 15:21:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2024-09-12 15:21:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2234. [2024-09-12 15:21:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2220 states have (on average 1.381981981981982) internal successors, (3068), 2221 states have internal predecessors, (3068), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:21:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 3081 transitions. [2024-09-12 15:21:52,820 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 3081 transitions. Word has length 81 [2024-09-12 15:21:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:21:52,821 INFO L474 AbstractCegarLoop]: Abstraction has 2234 states and 3081 transitions. [2024-09-12 15:21:52,821 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 11 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-12 15:21:52,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:21:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 3081 transitions. [2024-09-12 15:21:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 15:21:52,826 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:21:52,826 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:21:52,844 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-12 15:21:53,027 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:21:53,027 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:21:53,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:21:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1521296884, now seen corresponding path program 10 times [2024-09-12 15:21:53,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:21:53,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751218751] [2024-09-12 15:21:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:21:53,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:21:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:53,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:21:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:53,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:21:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:53,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:21:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:53,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:21:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:53,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:21:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:21:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-12 15:21:53,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:21:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751218751] [2024-09-12 15:21:53,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751218751] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:21:53,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012224077] [2024-09-12 15:21:53,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:21:53,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:21:53,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:21:53,755 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) [2024-09-12 15:21:53,756 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 15:21:53,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:21:53,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:21:53,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-12 15:21:53,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:21:53,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-09-12 15:21:53,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2024-09-12 15:21:53,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:21:53,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 49 [2024-09-12 15:21:53,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:21:53,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 63 [2024-09-12 15:21:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 17 proven. 90 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2024-09-12 15:21:55,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:21:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2024-09-12 15:21:55,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012224077] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:21:55,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:21:55,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 14] total 45 [2024-09-12 15:21:55,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796028915] [2024-09-12 15:21:55,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:21:55,353 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-12 15:21:55,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:21:55,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-12 15:21:55,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1731, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:21:55,355 INFO L87 Difference]: Start difference. First operand 2234 states and 3081 transitions. Second operand has 45 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 40 states have internal predecessors, (87), 16 states have call successors, (19), 7 states have call predecessors, (19), 4 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-12 15:21:59,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:21:59,002 INFO L93 Difference]: Finished difference Result 2247 states and 3095 transitions. [2024-09-12 15:21:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:21:59,002 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 40 states have internal predecessors, (87), 16 states have call successors, (19), 7 states have call predecessors, (19), 4 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 88 [2024-09-12 15:21:59,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:21:59,013 INFO L225 Difference]: With dead ends: 2247 [2024-09-12 15:21:59,014 INFO L226 Difference]: Without dead ends: 2245 [2024-09-12 15:21:59,015 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=825, Invalid=5027, Unknown=0, NotChecked=0, Total=5852 [2024-09-12 15:21:59,016 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 162 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:21:59,016 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 42 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 15:21:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2024-09-12 15:22:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2241. [2024-09-12 15:22:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2225 states have (on average 1.381123595505618) internal successors, (3073), 2226 states have internal predecessors, (3073), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 15:22:01,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 3088 transitions. [2024-09-12 15:22:01,284 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 3088 transitions. Word has length 88 [2024-09-12 15:22:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:22:01,284 INFO L474 AbstractCegarLoop]: Abstraction has 2241 states and 3088 transitions. [2024-09-12 15:22:01,284 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 40 states have internal predecessors, (87), 16 states have call successors, (19), 7 states have call predecessors, (19), 4 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-12 15:22:01,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:22:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 3088 transitions. [2024-09-12 15:22:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-12 15:22:01,290 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:22:01,290 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:22:01,307 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-12 15:22:01,493 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:22:01,494 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:22:01,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:22:01,494 INFO L85 PathProgramCache]: Analyzing trace with hash -238741709, now seen corresponding path program 11 times [2024-09-12 15:22:01,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:22:01,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094168634] [2024-09-12 15:22:01,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:22:01,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:22:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:01,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:22:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:01,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:22:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:03,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:22:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:03,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:22:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:03,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:22:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:03,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-12 15:22:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 14 proven. 211 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-12 15:22:03,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:22:03,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094168634] [2024-09-12 15:22:03,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094168634] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:22:03,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097746114] [2024-09-12 15:22:03,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:22:03,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:22:03,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:22:03,589 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) [2024-09-12 15:22:03,591 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 15:22:03,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-12 15:22:03,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:22:03,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-12 15:22:03,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:22:03,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 15:22:03,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:03,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-09-12 15:22:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:03,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:03,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:22:03,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-09-12 15:22:04,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:22:04,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-09-12 15:22:04,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 15:22:04,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 15:22:04,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-09-12 15:22:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-09-12 15:22:06,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:22:07,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-09-12 15:22:07,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-09-12 15:22:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2024-09-12 15:22:07,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097746114] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:22:07,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:22:07,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 13] total 54 [2024-09-12 15:22:07,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598138668] [2024-09-12 15:22:07,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:22:07,660 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-12 15:22:07,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:22:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-12 15:22:07,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2669, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:22:07,661 INFO L87 Difference]: Start difference. First operand 2241 states and 3088 transitions. Second operand has 54 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 15 states have call successors, (19), 7 states have call predecessors, (19), 4 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-12 15:22:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:22:33,861 INFO L93 Difference]: Finished difference Result 3433 states and 4683 transitions. [2024-09-12 15:22:33,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2024-09-12 15:22:33,862 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 15 states have call successors, (19), 7 states have call predecessors, (19), 4 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 95 [2024-09-12 15:22:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:22:33,874 INFO L225 Difference]: With dead ends: 3433 [2024-09-12 15:22:33,875 INFO L226 Difference]: Without dead ends: 3040 [2024-09-12 15:22:33,878 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 166 SyntacticMatches, 14 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12789 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=4200, Invalid=34412, Unknown=0, NotChecked=0, Total=38612 [2024-09-12 15:22:33,879 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 244 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 4831 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 4947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:22:33,879 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 36 Invalid, 4947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4831 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-12 15:22:33,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2024-09-12 15:22:36,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 2557. [2024-09-12 15:22:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 2539 states have (on average 1.3796770382040173) internal successors, (3503), 2540 states have internal predecessors, (3503), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:22:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 3520 transitions. [2024-09-12 15:22:36,752 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 3520 transitions. Word has length 95 [2024-09-12 15:22:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:22:36,752 INFO L474 AbstractCegarLoop]: Abstraction has 2557 states and 3520 transitions. [2024-09-12 15:22:36,752 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 15 states have call successors, (19), 7 states have call predecessors, (19), 4 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-12 15:22:36,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:22:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 3520 transitions. [2024-09-12 15:22:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-09-12 15:22:36,758 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:22:36,758 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:22:36,777 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-12 15:22:36,960 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-12 15:22:36,960 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:22:36,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:22:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1785967466, now seen corresponding path program 1 times [2024-09-12 15:22:36,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:22:36,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840357996] [2024-09-12 15:22:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:22:36,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:22:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:37,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:22:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:37,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:22:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:37,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:22:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:37,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:22:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:37,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:22:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:37,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-12 15:22:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:37,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-12 15:22:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-09-12 15:22:37,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:22:37,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840357996] [2024-09-12 15:22:37,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840357996] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:22:37,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074694929] [2024-09-12 15:22:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:22:37,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:22:37,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:22:37,098 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) [2024-09-12 15:22:37,099 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 15:22:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:22:37,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 15:22:37,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:22:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-09-12 15:22:37,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:22:37,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074694929] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:22:37,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:22:37,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2024-09-12 15:22:37,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885455859] [2024-09-12 15:22:37,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:22:37,268 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 15:22:37,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:22:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 15:22:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:22:37,268 INFO L87 Difference]: Start difference. First operand 2557 states and 3520 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-12 15:22:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:22:39,995 INFO L93 Difference]: Finished difference Result 2559 states and 3522 transitions. [2024-09-12 15:22:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 15:22:39,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 102 [2024-09-12 15:22:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:22:39,999 INFO L225 Difference]: With dead ends: 2559 [2024-09-12 15:22:40,000 INFO L226 Difference]: Without dead ends: 0 [2024-09-12 15:22:40,003 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:22:40,004 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:22:40,004 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:22:40,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-12 15:22:40,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-12 15:22:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-12 15:22:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-12 15:22:40,009 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2024-09-12 15:22:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:22:40,010 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-12 15:22:40,010 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-12 15:22:40,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:22:40,010 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-12 15:22:40,010 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-12 15:22:40,013 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-12 15:22:40,031 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-12 15:22:40,213 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-12 15:22:40,216 INFO L408 BasicCegarLoop]: Path program histogram: [11, 3, 2, 2, 1, 1, 1, 1] [2024-09-12 15:22:40,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-12 15:23:26,524 WARN L293 SmtUtils]: Spent 46.04s on a formula simplification. DAG size of input: 831 DAG size of output: 977 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or)