./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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/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 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 11:56:36,535 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 11:56:36,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 11:56:36,602 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 11:56:36,603 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 11:56:36,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 11:56:36,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 11:56:36,630 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 11:56:36,631 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 11:56:36,631 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 11:56:36,632 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 11:56:36,632 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 11:56:36,633 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 11:56:36,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 11:56:36,633 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 11:56:36,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 11:56:36,634 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 11:56:36,634 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 11:56:36,635 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 11:56:36,635 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 11:56:36,635 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 11:56:36,636 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 11:56:36,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 11:56:36,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 11:56:36,637 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 11:56:36,637 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 11:56:36,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 11:56:36,637 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 11:56:36,638 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 11:56:36,638 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 11:56:36,638 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 11:56:36,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 11:56:36,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 11:56:36,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 11:56:36,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 11:56:36,640 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 11:56:36,640 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 11:56:36,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 11:56:36,641 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 11:56:36,641 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 11:56:36,641 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 11:56:36,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 11:56:36,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 11:56:36,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 11:56:36,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 11:56:36,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 11:56:36,925 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 11:56:36,926 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 11:56:36,927 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/eureka_05.i [2024-09-20 11:56:38,387 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 11:56:38,558 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 11:56:38,558 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_05.i [2024-09-20 11:56:38,566 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/918f1942a/7de378c574224480ad76c41956af97d8/FLAG849fa8839 [2024-09-20 11:56:38,579 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/918f1942a/7de378c574224480ad76c41956af97d8 [2024-09-20 11:56:38,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 11:56:38,582 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 11:56:38,584 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 11:56:38,584 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 11:56:38,590 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 11:56:38,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20811eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38, skipping insertion in model container [2024-09-20 11:56:38,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,613 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 11:56:38,761 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_05.i[810,823] [2024-09-20 11:56:38,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 11:56:38,790 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 11:56:38,805 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_05.i[810,823] [2024-09-20 11:56:38,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 11:56:38,838 INFO L204 MainTranslator]: Completed translation [2024-09-20 11:56:38,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38 WrapperNode [2024-09-20 11:56:38,838 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 11:56:38,840 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 11:56:38,840 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 11:56:38,840 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 11:56:38,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,856 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,863 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 11:56:38,864 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 11:56:38,864 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 11:56:38,865 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 11:56:38,865 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 11:56:38,874 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,881 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,906 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 11, 2]. 73 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 3 writes are split as follows [0, 2, 1]. [2024-09-20 11:56:38,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,918 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,925 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,930 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,931 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,933 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 11:56:38,937 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 11:56:38,937 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 11:56:38,937 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 11:56:38,938 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 11:56:38,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:38,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 11:56:38,977 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 11:56:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 11:56:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 11:56:39,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 11:56:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 11:56:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 11:56:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 11:56:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 11:56:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 11:56:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 11:56:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 11:56:39,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 11:56:39,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 11:56:39,027 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2024-09-20 11:56:39,027 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2024-09-20 11:56:39,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 11:56:39,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 11:56:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 11:56:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 11:56:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 11:56:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 11:56:39,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 11:56:39,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 11:56:39,105 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 11:56:39,107 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 11:56:39,319 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-20 11:56:39,323 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 11:56:39,356 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 11:56:39,356 INFO L318 CfgBuilder]: Removed 4 assume(true) statements. [2024-09-20 11:56:39,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:56:39 BoogieIcfgContainer [2024-09-20 11:56:39,357 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 11:56:39,359 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 11:56:39,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 11:56:39,362 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 11:56:39,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 11:56:38" (1/3) ... [2024-09-20 11:56:39,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a876c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:56:39, skipping insertion in model container [2024-09-20 11:56:39,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (2/3) ... [2024-09-20 11:56:39,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a876c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:56:39, skipping insertion in model container [2024-09-20 11:56:39,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:56:39" (3/3) ... [2024-09-20 11:56:39,364 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2024-09-20 11:56:39,378 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 11:56:39,378 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 11:56:39,429 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 11:56:39,435 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;@3605f9ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 11:56:39,435 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 11:56:39,439 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) [2024-09-20 11:56:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 11:56:39,447 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:39,448 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:39,448 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:39,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:39,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2080310768, now seen corresponding path program 1 times [2024-09-20 11:56:39,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:39,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92228620] [2024-09-20 11:56:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:39,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:39,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:39,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 11:56:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 11:56:39,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:39,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92228620] [2024-09-20 11:56:39,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92228620] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:39,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 11:56:39,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 11:56:39,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895436806] [2024-09-20 11:56:39,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:39,778 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 11:56:39,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:39,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 11:56:39,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 11:56:39,807 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) [2024-09-20 11:56:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:40,043 INFO L93 Difference]: Finished difference Result 65 states and 92 transitions. [2024-09-20 11:56:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 11:56:40,046 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 [2024-09-20 11:56:40,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:40,056 INFO L225 Difference]: With dead ends: 65 [2024-09-20 11:56:40,056 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 11:56:40,060 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 [2024-09-20 11:56:40,067 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 [2024-09-20 11:56:40,068 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] [2024-09-20 11:56:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 11:56:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2024-09-20 11:56:40,107 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) [2024-09-20 11:56:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-09-20 11:56:40,111 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2024-09-20 11:56:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:40,112 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-09-20 11:56:40,112 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) [2024-09-20 11:56:40,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-09-20 11:56:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 11:56:40,115 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:40,115 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:40,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 11:56:40,115 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:40,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash 156377847, now seen corresponding path program 1 times [2024-09-20 11:56:40,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:40,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083476671] [2024-09-20 11:56:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:40,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 11:56:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 11:56:40,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:40,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083476671] [2024-09-20 11:56:40,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083476671] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:40,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 11:56:40,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 11:56:40,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875980964] [2024-09-20 11:56:40,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:40,227 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 11:56:40,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:40,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 11:56:40,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 11:56:40,228 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) [2024-09-20 11:56:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:40,393 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2024-09-20 11:56:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 11:56:40,393 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 [2024-09-20 11:56:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:40,395 INFO L225 Difference]: With dead ends: 56 [2024-09-20 11:56:40,395 INFO L226 Difference]: Without dead ends: 37 [2024-09-20 11:56:40,395 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-20 11:56:40,397 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 [2024-09-20 11:56:40,397 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] [2024-09-20 11:56:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-20 11:56:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2024-09-20 11:56:40,412 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) [2024-09-20 11:56:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-20 11:56:40,413 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2024-09-20 11:56:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:40,413 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-20 11:56:40,413 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) [2024-09-20 11:56:40,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-20 11:56:40,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 11:56:40,415 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:40,415 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:40,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 11:56:40,417 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:40,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:40,418 INFO L85 PathProgramCache]: Analyzing trace with hash 364897058, now seen corresponding path program 1 times [2024-09-20 11:56:40,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:40,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006321106] [2024-09-20 11:56:40,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:40,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 11:56:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 11:56:40,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:40,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006321106] [2024-09-20 11:56:40,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006321106] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:40,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718789468] [2024-09-20 11:56:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:40,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:40,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:40,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:40,568 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 11:56:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-20 11:56:40,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 11:56:40,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 11:56:40,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718789468] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:40,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:40,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2024-09-20 11:56:40,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852356316] [2024-09-20 11:56:40,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:40,741 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 11:56:40,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:40,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 11:56:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-09-20 11:56:40,743 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) [2024-09-20 11:56:41,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:41,034 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-20 11:56:41,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 11:56:41,035 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 [2024-09-20 11:56:41,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:41,036 INFO L225 Difference]: With dead ends: 65 [2024-09-20 11:56:41,036 INFO L226 Difference]: Without dead ends: 46 [2024-09-20 11:56:41,036 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2024-09-20 11:56:41,037 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 [2024-09-20 11:56:41,038 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] [2024-09-20 11:56:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-20 11:56:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2024-09-20 11:56:41,047 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) [2024-09-20 11:56:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-09-20 11:56:41,048 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2024-09-20 11:56:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:41,048 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-09-20 11:56:41,049 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) [2024-09-20 11:56:41,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-09-20 11:56:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 11:56:41,050 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:41,050 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:41,068 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 11:56:41,254 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:41,255 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:41,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:41,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1764338249, now seen corresponding path program 2 times [2024-09-20 11:56:41,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:41,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282260633] [2024-09-20 11:56:41,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:41,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:41,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:41,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 11:56:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 11:56:41,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:41,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282260633] [2024-09-20 11:56:41,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282260633] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:41,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 11:56:41,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 11:56:41,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518831564] [2024-09-20 11:56:41,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:41,413 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 11:56:41,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:41,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 11:56:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 11:56:41,414 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) [2024-09-20 11:56:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:41,584 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-09-20 11:56:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 11:56:41,585 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 [2024-09-20 11:56:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:41,586 INFO L225 Difference]: With dead ends: 46 [2024-09-20 11:56:41,588 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 11:56:41,588 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 [2024-09-20 11:56:41,589 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 [2024-09-20 11:56:41,589 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] [2024-09-20 11:56:41,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 11:56:41,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-09-20 11:56:41,602 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) [2024-09-20 11:56:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-09-20 11:56:41,603 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2024-09-20 11:56:41,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:41,604 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-09-20 11:56:41,604 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) [2024-09-20 11:56:41,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-09-20 11:56:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 11:56:41,605 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:41,605 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] [2024-09-20 11:56:41,605 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 11:56:41,606 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:41,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:41,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1674322940, now seen corresponding path program 1 times [2024-09-20 11:56:41,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:41,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469691799] [2024-09-20 11:56:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:41,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:41,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:41,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 11:56:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 11:56:41,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:41,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469691799] [2024-09-20 11:56:41,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469691799] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:41,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738624008] [2024-09-20 11:56:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:41,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:41,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:41,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:41,766 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 11:56:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:41,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 11:56:41,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 11:56:41,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 11:56:42,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738624008] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:42,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:42,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-20 11:56:42,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511605948] [2024-09-20 11:56:42,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:42,014 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 11:56:42,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:42,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 11:56:42,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-20 11:56:42,015 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) [2024-09-20 11:56:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:42,514 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-09-20 11:56:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 11:56:42,515 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 [2024-09-20 11:56:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:42,516 INFO L225 Difference]: With dead ends: 70 [2024-09-20 11:56:42,516 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 11:56:42,517 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 [2024-09-20 11:56:42,518 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 [2024-09-20 11:56:42,518 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] [2024-09-20 11:56:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 11:56:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2024-09-20 11:56:42,532 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) [2024-09-20 11:56:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-20 11:56:42,534 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2024-09-20 11:56:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:42,535 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-20 11:56:42,535 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) [2024-09-20 11:56:42,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-20 11:56:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 11:56:42,536 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:42,536 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] [2024-09-20 11:56:42,553 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 11:56:42,736 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 [2024-09-20 11:56:42,737 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:42,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:42,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2009987497, now seen corresponding path program 1 times [2024-09-20 11:56:42,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:42,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658732518] [2024-09-20 11:56:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:42,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:42,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:42,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 11:56:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 11:56:42,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:42,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658732518] [2024-09-20 11:56:42,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658732518] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:42,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032699343] [2024-09-20 11:56:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:42,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:42,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:42,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:42,890 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 11:56:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:42,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-20 11:56:42,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 11:56:43,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 11:56:43,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032699343] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:43,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:43,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2024-09-20 11:56:43,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112396746] [2024-09-20 11:56:43,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:43,235 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 11:56:43,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:43,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 11:56:43,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-09-20 11:56:43,237 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) [2024-09-20 11:56:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:43,810 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2024-09-20 11:56:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 11:56:43,810 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 [2024-09-20 11:56:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:43,811 INFO L225 Difference]: With dead ends: 83 [2024-09-20 11:56:43,811 INFO L226 Difference]: Without dead ends: 66 [2024-09-20 11:56:43,812 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 11:56:43,813 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 [2024-09-20 11:56:43,813 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] [2024-09-20 11:56:43,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-20 11:56:43,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-09-20 11:56:43,838 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) [2024-09-20 11:56:43,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-20 11:56:43,841 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 28 [2024-09-20 11:56:43,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:43,842 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-20 11:56:43,842 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) [2024-09-20 11:56:43,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-20 11:56:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 11:56:43,844 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:43,844 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] [2024-09-20 11:56:43,863 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 11:56:44,045 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 [2024-09-20 11:56:44,046 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:44,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:44,046 INFO L85 PathProgramCache]: Analyzing trace with hash 752690779, now seen corresponding path program 2 times [2024-09-20 11:56:44,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:44,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895562986] [2024-09-20 11:56:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:44,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:44,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:44,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 11:56:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-20 11:56:44,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:44,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895562986] [2024-09-20 11:56:44,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895562986] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:44,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22987095] [2024-09-20 11:56:44,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:56:44,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:44,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:44,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:44,323 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 11:56:44,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 11:56:44,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:56:44,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 11:56:44,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-20 11:56:44,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-20 11:56:44,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22987095] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:44,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:44,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 19 [2024-09-20 11:56:44,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736039753] [2024-09-20 11:56:44,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:44,908 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 11:56:44,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:44,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 11:56:44,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-09-20 11:56:44,909 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) [2024-09-20 11:56:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:45,202 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2024-09-20 11:56:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 11:56:45,202 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 [2024-09-20 11:56:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:45,206 INFO L225 Difference]: With dead ends: 84 [2024-09-20 11:56:45,206 INFO L226 Difference]: Without dead ends: 72 [2024-09-20 11:56:45,206 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 [2024-09-20 11:56:45,207 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 [2024-09-20 11:56:45,207 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] [2024-09-20 11:56:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-20 11:56:45,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-20 11:56:45,231 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) [2024-09-20 11:56:45,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2024-09-20 11:56:45,234 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 58 [2024-09-20 11:56:45,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:45,236 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2024-09-20 11:56:45,236 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) [2024-09-20 11:56:45,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2024-09-20 11:56:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 11:56:45,238 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:45,239 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] [2024-09-20 11:56:45,258 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 11:56:45,440 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 [2024-09-20 11:56:45,440 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:45,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:45,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1101248827, now seen corresponding path program 3 times [2024-09-20 11:56:45,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:45,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216728359] [2024-09-20 11:56:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:45,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:45,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:45,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 11:56:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-20 11:56:45,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:45,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216728359] [2024-09-20 11:56:45,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216728359] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:45,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001500099] [2024-09-20 11:56:45,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 11:56:45,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:45,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:45,686 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:45,688 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 11:56:45,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-20 11:56:45,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:56:45,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 11:56:45,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:45,794 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 [2024-09-20 11:56:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-09-20 11:56:46,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 11:56:46,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001500099] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:46,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 11:56:46,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2024-09-20 11:56:46,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479165249] [2024-09-20 11:56:46,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:46,134 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 11:56:46,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:46,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 11:56:46,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2024-09-20 11:56:46,135 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) [2024-09-20 11:56:46,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:46,304 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2024-09-20 11:56:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 11:56:46,304 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 [2024-09-20 11:56:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:46,306 INFO L225 Difference]: With dead ends: 81 [2024-09-20 11:56:46,307 INFO L226 Difference]: Without dead ends: 79 [2024-09-20 11:56:46,308 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-09-20 11:56:46,309 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 [2024-09-20 11:56:46,309 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] [2024-09-20 11:56:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-20 11:56:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2024-09-20 11:56:46,349 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) [2024-09-20 11:56:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2024-09-20 11:56:46,349 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 64 [2024-09-20 11:56:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:46,351 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2024-09-20 11:56:46,351 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) [2024-09-20 11:56:46,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2024-09-20 11:56:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 11:56:46,353 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:46,354 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] [2024-09-20 11:56:46,371 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 11:56:46,558 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 [2024-09-20 11:56:46,559 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:46,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2042194420, now seen corresponding path program 1 times [2024-09-20 11:56:46,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:46,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622111881] [2024-09-20 11:56:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:46,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:46,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:46,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 11:56:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:46,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-20 11:56:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 2 proven. 147 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-20 11:56:46,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:46,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622111881] [2024-09-20 11:56:46,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622111881] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:46,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114840463] [2024-09-20 11:56:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:46,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:46,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:46,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:46,853 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 11:56:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:46,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 11:56:46,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 27 proven. 120 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 11:56:47,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 29 proven. 120 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-20 11:56:47,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114840463] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:47,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:47,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 21 [2024-09-20 11:56:47,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494137882] [2024-09-20 11:56:47,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:47,420 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 11:56:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:47,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 11:56:47,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-09-20 11:56:47,421 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) [2024-09-20 11:56:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:47,901 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2024-09-20 11:56:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 11:56:47,902 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 [2024-09-20 11:56:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:47,904 INFO L225 Difference]: With dead ends: 106 [2024-09-20 11:56:47,904 INFO L226 Difference]: Without dead ends: 81 [2024-09-20 11:56:47,905 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 [2024-09-20 11:56:47,906 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 168 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-09-20 11:56:47,906 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] [2024-09-20 11:56:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-20 11:56:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-09-20 11:56:47,934 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) [2024-09-20 11:56:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-09-20 11:56:47,934 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 71 [2024-09-20 11:56:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:47,935 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-09-20 11:56:47,935 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) [2024-09-20 11:56:47,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-09-20 11:56:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 11:56:47,936 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:47,937 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] [2024-09-20 11:56:47,949 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 11:56:48,137 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:48,137 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:48,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2083039638, now seen corresponding path program 2 times [2024-09-20 11:56:48,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:48,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375181704] [2024-09-20 11:56:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:48,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:49,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:49,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 11:56:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:49,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 11:56:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 2 proven. 142 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-20 11:56:49,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:49,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375181704] [2024-09-20 11:56:49,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375181704] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:49,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834087970] [2024-09-20 11:56:49,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:56:49,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:49,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:49,788 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:49,789 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 11:56:49,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 11:56:49,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:56:49,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 11:56:49,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:50,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:56:50,003 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 [2024-09-20 11:56:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-09-20 11:56:50,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 96 proven. 15 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-09-20 11:56:51,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834087970] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:51,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:51,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 41 [2024-09-20 11:56:51,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62785509] [2024-09-20 11:56:51,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:51,020 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-20 11:56:51,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:51,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-20 11:56:51,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 11:56:51,022 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 37 states have internal predecessors, (92), 6 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) [2024-09-20 11:56:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:52,702 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2024-09-20 11:56:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 11:56:52,703 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 37 states have internal predecessors, (92), 6 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 [2024-09-20 11:56:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:52,704 INFO L225 Difference]: With dead ends: 161 [2024-09-20 11:56:52,705 INFO L226 Difference]: Without dead ends: 101 [2024-09-20 11:56:52,706 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=602, Invalid=3688, Unknown=0, NotChecked=0, Total=4290 [2024-09-20 11:56:52,707 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 216 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:52,707 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 8 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 11:56:52,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-20 11:56:52,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2024-09-20 11:56:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 79 states have internal predecessors, (98), 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) [2024-09-20 11:56:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2024-09-20 11:56:52,743 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 74 [2024-09-20 11:56:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:52,743 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2024-09-20 11:56:52,743 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 37 states have internal predecessors, (92), 6 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) [2024-09-20 11:56:52,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2024-09-20 11:56:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 11:56:52,745 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:52,745 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] [2024-09-20 11:56:52,763 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 11:56:52,949 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:52,950 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:52,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:52,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1642634130, now seen corresponding path program 1 times [2024-09-20 11:56:52,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:52,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545428510] [2024-09-20 11:56:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:52,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:53,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:53,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 11:56:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:53,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 11:56:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 2 proven. 129 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-20 11:56:53,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:53,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545428510] [2024-09-20 11:56:53,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545428510] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:53,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328902537] [2024-09-20 11:56:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:53,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:53,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:53,998 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:53,999 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 11:56:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:54,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 11:56:54,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:54,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:56:54,208 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 [2024-09-20 11:56:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-09-20 11:56:54,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 80 proven. 7 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-09-20 11:56:54,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328902537] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:54,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:54,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 36 [2024-09-20 11:56:54,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093252756] [2024-09-20 11:56:54,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:54,991 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 11:56:54,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 11:56:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 11:56:54,993 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 32 states have internal predecessors, (85), 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) [2024-09-20 11:56:55,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:55,686 INFO L93 Difference]: Finished difference Result 159 states and 193 transitions. [2024-09-20 11:56:55,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 11:56:55,687 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 32 states have internal predecessors, (85), 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 [2024-09-20 11:56:55,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:55,688 INFO L225 Difference]: With dead ends: 159 [2024-09-20 11:56:55,688 INFO L226 Difference]: Without dead ends: 101 [2024-09-20 11:56:55,689 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=377, Invalid=1975, Unknown=0, NotChecked=0, Total=2352 [2024-09-20 11:56:55,690 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 106 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:55,690 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 5 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 11:56:55,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-20 11:56:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2024-09-20 11:56:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 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) [2024-09-20 11:56:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2024-09-20 11:56:55,717 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 74 [2024-09-20 11:56:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:55,717 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2024-09-20 11:56:55,717 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 32 states have internal predecessors, (85), 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) [2024-09-20 11:56:55,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:55,718 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2024-09-20 11:56:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 11:56:55,719 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:55,719 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] [2024-09-20 11:56:55,731 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 11:56:55,919 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 [2024-09-20 11:56:55,919 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:55,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:55,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2086534804, now seen corresponding path program 2 times [2024-09-20 11:56:55,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:55,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175262063] [2024-09-20 11:56:55,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:55,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:56,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:56,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 11:56:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:56,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 11:56:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 11:56:56,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175262063] [2024-09-20 11:56:56,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175262063] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:56,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462280309] [2024-09-20 11:56:56,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:56:56,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:56,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:56,497 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:56,498 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 11:56:56,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 11:56:56,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:56:56,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 11:56:56,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:56,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:56:56,685 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 [2024-09-20 11:56:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-09-20 11:56:56,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2024-09-20 11:56:57,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462280309] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:57,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-20 11:56:57,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17, 8] total 29 [2024-09-20 11:56:57,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651594400] [2024-09-20 11:56:57,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:57,257 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 11:56:57,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:57,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 11:56:57,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-09-20 11:56:57,258 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 11:56:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:57,476 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2024-09-20 11:56:57,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 11:56:57,476 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2024-09-20 11:56:57,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:57,477 INFO L225 Difference]: With dead ends: 158 [2024-09-20 11:56:57,478 INFO L226 Difference]: Without dead ends: 94 [2024-09-20 11:56:57,478 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 11:56:57,479 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:57,479 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 67 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:56:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-20 11:56:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-09-20 11:56:57,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 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) [2024-09-20 11:56:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2024-09-20 11:56:57,511 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 74 [2024-09-20 11:56:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:57,512 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2024-09-20 11:56:57,512 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 11:56:57,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2024-09-20 11:56:57,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 11:56:57,515 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:57,515 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] [2024-09-20 11:56:57,529 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 11:56:57,715 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 [2024-09-20 11:56:57,716 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:57,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:57,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2132308138, now seen corresponding path program 3 times [2024-09-20 11:56:57,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:57,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445093375] [2024-09-20 11:56:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:57,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:58,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:58,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 11:56:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:59,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 11:56:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 2 proven. 142 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-20 11:56:59,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:59,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445093375] [2024-09-20 11:56:59,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445093375] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:59,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810904301] [2024-09-20 11:56:59,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 11:56:59,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:59,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:59,118 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:56:59,120 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 11:56:59,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 11:56:59,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:56:59,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 11:56:59,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:59,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-09-20 11:56:59,254 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 [2024-09-20 11:56:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-20 11:56:59,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-20 11:57:00,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810904301] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:00,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:00,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 10] total 36 [2024-09-20 11:57:00,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866309056] [2024-09-20 11:57:00,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:00,069 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 11:57:00,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:00,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 11:57:00,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 11:57:00,071 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 36 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 10 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) [2024-09-20 11:57:01,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:01,362 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2024-09-20 11:57:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 11:57:01,363 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 10 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 [2024-09-20 11:57:01,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:01,363 INFO L225 Difference]: With dead ends: 151 [2024-09-20 11:57:01,363 INFO L226 Difference]: Without dead ends: 90 [2024-09-20 11:57:01,365 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=447, Invalid=3335, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 11:57:01,365 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 110 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:01,365 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 30 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 11:57:01,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-20 11:57:01,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-09-20 11:57:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 78 states have internal predecessors, (94), 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) [2024-09-20 11:57:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2024-09-20 11:57:01,397 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 74 [2024-09-20 11:57:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:01,397 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2024-09-20 11:57:01,397 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 10 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) [2024-09-20 11:57:01,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2024-09-20 11:57:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-20 11:57:01,398 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:01,398 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:57:01,411 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 11:57:01,598 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 [2024-09-20 11:57:01,599 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:01,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1023722515, now seen corresponding path program 4 times [2024-09-20 11:57:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:01,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045671434] [2024-09-20 11:57:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:01,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:01,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:01,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 11:57:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:03,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 11:57:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:03,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 11:57:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 27 proven. 152 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-20 11:57:03,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:03,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045671434] [2024-09-20 11:57:03,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045671434] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:03,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350464096] [2024-09-20 11:57:03,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 11:57:03,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:03,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:03,334 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:57:03,335 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 11:57:03,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 11:57:03,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:57:03,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-20 11:57:03,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:03,577 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 28 treesize of output 7 [2024-09-20 11:57:03,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:03,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 47 [2024-09-20 11:57:04,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:04,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 17 [2024-09-20 11:57:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 84 proven. 122 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-20 11:57:04,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 164 proven. 24 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-20 11:57:09,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350464096] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:09,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:09,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22, 15] total 60 [2024-09-20 11:57:09,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170665386] [2024-09-20 11:57:09,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:09,129 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-20 11:57:09,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:09,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-20 11:57:09,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=3216, Unknown=1, NotChecked=0, Total=3540 [2024-09-20 11:57:09,131 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 58 states have internal predecessors, (119), 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) [2024-09-20 11:57:18,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:57:23,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:57:35,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:57:40,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:57:46,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:57:50,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:57:54,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:58:02,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:58:06,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:58:11,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:58:37,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:58:41,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:58:46,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 11:59:29,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 12:00:02,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 12:00:20,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 12:00:30,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-20 12:00:34,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]