./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d115e09498e3f278fd539730f0fa55e0745770e0304e10455a14000311085b68 --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 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 15:18:28,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 15:18:28,297 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 15:18:28,303 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 15:18:28,305 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 15:18:28,330 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 15:18:28,330 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 15:18:28,331 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 15:18:28,331 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 15:18:28,332 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 15:18:28,332 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 15:18:28,332 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 15:18:28,333 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 15:18:28,333 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 15:18:28,334 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 15:18:28,334 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 15:18:28,334 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 15:18:28,335 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 15:18:28,335 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 15:18:28,335 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 15:18:28,336 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 15:18:28,339 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 15:18:28,340 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 15:18:28,340 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 15:18:28,340 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 15:18:28,341 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 15:18:28,341 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 15:18:28,341 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 15:18:28,341 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 15:18:28,342 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 15:18:28,342 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 15:18:28,342 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 15:18:28,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:18:28,343 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 15:18:28,343 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 15:18:28,343 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 15:18:28,343 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 15:18:28,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 15:18:28,344 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 15:18:28,344 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 15:18:28,344 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 15:18:28,349 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 15:18:28,349 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d115e09498e3f278fd539730f0fa55e0745770e0304e10455a14000311085b68 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 15:18:28,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 15:18:28,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 15:18:28,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 15:18:28,690 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 15:18:28,691 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 15:18:28,692 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c [2024-10-15 15:18:30,095 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 15:18:30,280 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 15:18:30,280 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c [2024-10-15 15:18:30,288 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4869224b9/2793279ce6424c339f12421526695660/FLAG8e5d1e3cf [2024-10-15 15:18:30,676 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4869224b9/2793279ce6424c339f12421526695660 [2024-10-15 15:18:30,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 15:18:30,679 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 15:18:30,680 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 15:18:30,680 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 15:18:30,685 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 15:18:30,686 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:30,686 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a0e965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30, skipping insertion in model container [2024-10-15 15:18:30,687 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:30,706 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 15:18:30,887 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c[1137,1150] [2024-10-15 15:18:30,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:18:30,932 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 15:18:30,947 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c[1137,1150] [2024-10-15 15:18:30,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:18:30,989 INFO L204 MainTranslator]: Completed translation [2024-10-15 15:18:30,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30 WrapperNode [2024-10-15 15:18:30,989 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 15:18:30,990 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 15:18:30,991 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 15:18:30,991 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 15:18:30,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:31,012 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:31,024 INFO L138 Inliner]: procedures = 16, calls = 76, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 15:18:31,024 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 15:18:31,027 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 15:18:31,027 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 15:18:31,027 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 15:18:31,037 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:31,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:31,041 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:31,059 INFO L175 MemorySlicer]: Split 46 memory accesses to 8 slices as follows [2, 4, 4, 8, 7, 7, 8, 6]. 17 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0]. The 13 writes are split as follows [0, 2, 2, 3, 1, 2, 1, 2]. [2024-10-15 15:18:31,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:31,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:31,068 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:31,069 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:31,071 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:31,072 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:31,075 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 15:18:31,076 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 15:18:31,076 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 15:18:31,076 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 15:18:31,077 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (1/1) ... [2024-10-15 15:18:31,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:18:31,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:18:31,106 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) [2024-10-15 15:18:31,112 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 [2024-10-15 15:18:31,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 15:18:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 15:18:31,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 15:18:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 15:18:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-15 15:18:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-15 15:18:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-15 15:18:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-15 15:18:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-15 15:18:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-15 15:18:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-15 15:18:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-15 15:18:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-15 15:18:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-15 15:18:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-15 15:18:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-15 15:18:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-15 15:18:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-15 15:18:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-15 15:18:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-15 15:18:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 15:18:31,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 15:18:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 15:18:31,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 15:18:31,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-15 15:18:31,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-15 15:18:31,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-15 15:18:31,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-15 15:18:31,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-15 15:18:31,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-15 15:18:31,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-15 15:18:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-15 15:18:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_41_0 [2024-10-15 15:18:31,170 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_41_0 [2024-10-15 15:18:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 15:18:31,170 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 15:18:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-15 15:18:31,280 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 15:18:31,284 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 15:18:31,517 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-10-15 15:18:31,518 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 15:18:31,544 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 15:18:31,548 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-15 15:18:31,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:18:31 BoogieIcfgContainer [2024-10-15 15:18:31,549 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 15:18:31,551 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 15:18:31,551 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 15:18:31,555 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 15:18:31,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:18:30" (1/3) ... [2024-10-15 15:18:31,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe21645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:18:31, skipping insertion in model container [2024-10-15 15:18:31,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:30" (2/3) ... [2024-10-15 15:18:31,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe21645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:18:31, skipping insertion in model container [2024-10-15 15:18:31,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:18:31" (3/3) ... [2024-10-15 15:18:31,558 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_bresenham-ll.c [2024-10-15 15:18:31,576 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 15:18:31,576 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 15:18:31,627 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 15:18:31,632 INFO L333 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;@6d44d65a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 15:18:31,633 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 15:18:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-15 15:18:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-15 15:18:31,643 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:18:31,644 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:18:31,644 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:18:31,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:31,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1584617207, now seen corresponding path program 1 times [2024-10-15 15:18:31,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:18:31,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710248890] [2024-10-15 15:18:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:31,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:18:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:18:31,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831820353] [2024-10-15 15:18:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:31,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:31,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:18:31,953 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) [2024-10-15 15:18:31,955 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 15:18:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:32,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-10-15 15:18:32,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:18:32,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:32,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:32,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:32,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:32,252 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 25 treesize of output 19 [2024-10-15 15:18:32,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-10-15 15:18:32,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:18:32,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:18:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:18:32,511 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:18:32,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:18:32,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710248890] [2024-10-15 15:18:32,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:18:32,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831820353] [2024-10-15 15:18:32,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831820353] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:18:32,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:18:32,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:18:32,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379532004] [2024-10-15 15:18:32,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:18:32,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:18:32,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:18:32,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:18:32,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:18:32,548 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 15:18:32,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:18:32,812 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2024-10-15 15:18:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:18:32,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-10-15 15:18:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:18:32,826 INFO L225 Difference]: With dead ends: 63 [2024-10-15 15:18:32,826 INFO L226 Difference]: Without dead ends: 37 [2024-10-15 15:18:32,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:18:32,837 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:18:32,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 114 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:18:32,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-15 15:18:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-10-15 15:18:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-15 15:18:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-10-15 15:18:32,947 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 12 [2024-10-15 15:18:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:18:32,948 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-10-15 15:18:32,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 15:18:32,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-10-15 15:18:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-15 15:18:32,950 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:18:32,950 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:18:32,968 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 15:18:33,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-15 15:18:33,155 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:18:33,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:33,156 INFO L85 PathProgramCache]: Analyzing trace with hash 404436698, now seen corresponding path program 1 times [2024-10-15 15:18:33,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:18:33,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078594328] [2024-10-15 15:18:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:33,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:18:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:18:33,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664249096] [2024-10-15 15:18:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:33,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:33,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:18:33,237 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) [2024-10-15 15:18:33,239 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 15:18:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:33,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-15 15:18:33,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:18:33,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:33,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:33,405 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 25 treesize of output 19 [2024-10-15 15:18:33,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-10-15 15:18:33,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-10-15 15:18:33,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:18:33,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:18:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:18:33,611 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:18:33,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:18:33,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078594328] [2024-10-15 15:18:33,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:18:33,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664249096] [2024-10-15 15:18:33,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664249096] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:18:33,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:18:33,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-15 15:18:33,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465636131] [2024-10-15 15:18:33,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:18:33,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 15:18:33,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:18:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 15:18:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-15 15:18:33,616 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 15:18:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:18:33,789 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2024-10-15 15:18:33,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 15:18:33,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-10-15 15:18:33,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:18:33,792 INFO L225 Difference]: With dead ends: 45 [2024-10-15 15:18:33,794 INFO L226 Difference]: Without dead ends: 35 [2024-10-15 15:18:33,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-15 15:18:33,796 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:18:33,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:18:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-15 15:18:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-15 15:18:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-15 15:18:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-10-15 15:18:33,813 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2024-10-15 15:18:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:18:33,813 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-10-15 15:18:33,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 15:18:33,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-10-15 15:18:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-15 15:18:33,815 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:18:33,816 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:18:33,832 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-15 15:18:34,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:34,017 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:18:34,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:34,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1939087400, now seen corresponding path program 1 times [2024-10-15 15:18:34,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:18:34,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250410597] [2024-10-15 15:18:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:34,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:18:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:18:34,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670177132] [2024-10-15 15:18:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:34,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:34,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:18:34,130 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) [2024-10-15 15:18:34,131 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 15:18:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:34,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 148 conjuncts are in the unsatisfiable core [2024-10-15 15:18:34,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:18:34,374 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 25 treesize of output 19 [2024-10-15 15:18:34,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:34,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:34,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:34,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:34,770 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 43 treesize of output 31 [2024-10-15 15:18:38,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:18:39,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-10-15 15:18:39,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:18:39,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-10-15 15:18:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:18:39,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:18:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:18:39,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:18:39,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250410597] [2024-10-15 15:18:39,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:18:39,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670177132] [2024-10-15 15:18:39,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670177132] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:18:39,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:18:39,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2024-10-15 15:18:39,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722018006] [2024-10-15 15:18:39,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:18:39,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 15:18:39,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:18:39,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 15:18:39,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=520, Unknown=1, NotChecked=0, Total=600 [2024-10-15 15:18:39,950 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 25 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 15:18:41,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:18:41,270 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-10-15 15:18:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-15 15:18:41,271 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-10-15 15:18:41,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:18:41,272 INFO L225 Difference]: With dead ends: 56 [2024-10-15 15:18:41,272 INFO L226 Difference]: Without dead ends: 52 [2024-10-15 15:18:41,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=169, Invalid=952, Unknown=1, NotChecked=0, Total=1122 [2024-10-15 15:18:41,274 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 15:18:41,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 158 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 15:18:41,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-15 15:18:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-10-15 15:18:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-10-15 15:18:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2024-10-15 15:18:41,317 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 24 [2024-10-15 15:18:41,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:18:41,318 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2024-10-15 15:18:41,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 15:18:41,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:41,318 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2024-10-15 15:18:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 15:18:41,320 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:18:41,320 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:18:41,335 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-15 15:18:41,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-15 15:18:41,521 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:18:41,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:41,522 INFO L85 PathProgramCache]: Analyzing trace with hash 674694001, now seen corresponding path program 1 times [2024-10-15 15:18:41,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:18:41,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463747566] [2024-10-15 15:18:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:41,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:18:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:18:41,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275957942] [2024-10-15 15:18:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:41,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:41,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:18:41,604 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) [2024-10-15 15:18:41,606 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 15:18:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:41,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-10-15 15:18:41,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:18:41,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:41,849 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 25 treesize of output 19 [2024-10-15 15:18:41,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:41,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:41,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:41,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-10-15 15:18:42,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:42,684 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 52 treesize of output 36 [2024-10-15 15:18:42,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:18:42,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-10-15 15:18:42,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-15 15:18:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-15 15:18:42,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:18:44,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:18:44,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463747566] [2024-10-15 15:18:44,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:18:44,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275957942] [2024-10-15 15:18:44,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275957942] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:18:44,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:18:44,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-15 15:18:44,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796273280] [2024-10-15 15:18:44,333 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:18:44,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 15:18:44,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:18:44,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 15:18:44,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-10-15 15:18:44,334 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-15 15:18:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:18:44,972 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2024-10-15 15:18:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 15:18:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2024-10-15 15:18:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:18:44,974 INFO L225 Difference]: With dead ends: 59 [2024-10-15 15:18:44,974 INFO L226 Difference]: Without dead ends: 49 [2024-10-15 15:18:44,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-10-15 15:18:44,976 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:18:44,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 54 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:18:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-15 15:18:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-15 15:18:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2024-10-15 15:18:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2024-10-15 15:18:44,997 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 36 [2024-10-15 15:18:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:18:44,997 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2024-10-15 15:18:44,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-15 15:18:44,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2024-10-15 15:18:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 15:18:44,999 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:18:44,999 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:18:45,018 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 15:18:45,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:45,204 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:18:45,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1097395827, now seen corresponding path program 1 times [2024-10-15 15:18:45,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:18:45,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685353818] [2024-10-15 15:18:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:45,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:18:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:18:45,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834560745] [2024-10-15 15:18:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:45,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:45,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:18:45,303 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) [2024-10-15 15:18:45,305 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 15:18:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:45,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-10-15 15:18:45,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:18:45,498 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 25 treesize of output 19 [2024-10-15 15:18:45,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:45,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:45,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:45,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-10-15 15:18:45,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:46,106 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 50 treesize of output 39 [2024-10-15 15:18:46,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:18:46,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-10-15 15:18:46,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-15 15:18:46,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-15 15:18:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-15 15:18:46,252 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:18:46,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2024-10-15 15:18:46,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:18:46,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685353818] [2024-10-15 15:18:46,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:18:46,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834560745] [2024-10-15 15:18:46,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834560745] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:18:46,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:18:46,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-15 15:18:46,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362874090] [2024-10-15 15:18:46,955 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:18:46,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 15:18:46,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:18:46,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 15:18:46,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-10-15 15:18:46,968 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-15 15:18:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:18:47,451 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2024-10-15 15:18:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 15:18:47,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2024-10-15 15:18:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:18:47,453 INFO L225 Difference]: With dead ends: 57 [2024-10-15 15:18:47,454 INFO L226 Difference]: Without dead ends: 51 [2024-10-15 15:18:47,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-10-15 15:18:47,455 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:18:47,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:18:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-15 15:18:47,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2024-10-15 15:18:47,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-10-15 15:18:47,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2024-10-15 15:18:47,475 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 36 [2024-10-15 15:18:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:18:47,476 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2024-10-15 15:18:47,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-15 15:18:47,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2024-10-15 15:18:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-15 15:18:47,478 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:18:47,478 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:18:47,497 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 15:18:47,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:47,679 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:18:47,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:47,679 INFO L85 PathProgramCache]: Analyzing trace with hash 18206728, now seen corresponding path program 2 times [2024-10-15 15:18:47,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:18:47,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759175659] [2024-10-15 15:18:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:47,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:18:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:18:47,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143584641] [2024-10-15 15:18:47,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:18:47,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:47,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:18:47,770 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) [2024-10-15 15:18:47,773 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 15:18:47,984 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:18:47,984 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:18:47,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-10-15 15:18:47,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:18:48,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:48,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:48,007 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 25 treesize of output 19 [2024-10-15 15:18:48,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:48,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-10-15 15:18:48,645 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 43 treesize of output 31 [2024-10-15 15:18:48,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:18:48,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-10-15 15:18:48,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:18:48,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-10-15 15:18:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:18:48,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:18:50,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:18:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759175659] [2024-10-15 15:18:50,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:18:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143584641] [2024-10-15 15:18:50,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143584641] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:18:50,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:18:50,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-15 15:18:50,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643898966] [2024-10-15 15:18:50,044 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:18:50,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 15:18:50,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:18:50,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 15:18:50,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2024-10-15 15:18:50,046 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 16 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-15 15:18:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:18:50,457 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2024-10-15 15:18:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 15:18:50,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2024-10-15 15:18:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:18:50,459 INFO L225 Difference]: With dead ends: 59 [2024-10-15 15:18:50,459 INFO L226 Difference]: Without dead ends: 53 [2024-10-15 15:18:50,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-10-15 15:18:50,460 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:18:50,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 94 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:18:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-15 15:18:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-10-15 15:18:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-10-15 15:18:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-10-15 15:18:50,480 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 50 [2024-10-15 15:18:50,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:18:50,480 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-10-15 15:18:50,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-15 15:18:50,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-10-15 15:18:50,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-15 15:18:50,482 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:18:50,482 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:18:50,497 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 15:18:50,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:50,683 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:18:50,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:50,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1787231606, now seen corresponding path program 1 times [2024-10-15 15:18:50,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:18:50,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913531311] [2024-10-15 15:18:50,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:50,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:18:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:52,274 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:18:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:52,290 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:18:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:53,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:18:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:53,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:18:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:53,947 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:18:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:53,954 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:18:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:54,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:18:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 15:18:54,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:18:54,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913531311] [2024-10-15 15:18:54,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913531311] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:18:54,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466828501] [2024-10-15 15:18:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:54,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:54,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:18:54,199 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) [2024-10-15 15:18:54,201 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 15:18:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:54,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-10-15 15:18:54,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:18:54,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:54,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:54,408 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 25 treesize of output 19 [2024-10-15 15:18:54,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:54,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-10-15 15:18:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-15 15:18:55,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:18:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:18:57,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466828501] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:18:57,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:18:57,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 19] total 48 [2024-10-15 15:18:57,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38918312] [2024-10-15 15:18:57,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:18:57,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 15:18:57,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:18:57,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 15:18:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2023, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 15:18:57,573 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 48 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 42 states have internal predecessors, (65), 19 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-15 15:18:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:18:58,900 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-10-15 15:18:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 15:18:58,901 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 42 states have internal predecessors, (65), 19 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) Word has length 50 [2024-10-15 15:18:58,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:18:58,902 INFO L225 Difference]: With dead ends: 63 [2024-10-15 15:18:58,902 INFO L226 Difference]: Without dead ends: 57 [2024-10-15 15:18:58,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=358, Invalid=2948, Unknown=0, NotChecked=0, Total=3306 [2024-10-15 15:18:58,904 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:18:58,904 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 15:18:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-15 15:18:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2024-10-15 15:18:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2024-10-15 15:18:58,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-10-15 15:18:58,927 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 50 [2024-10-15 15:18:58,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:18:58,927 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-10-15 15:18:58,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 42 states have internal predecessors, (65), 19 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-15 15:18:58,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:58,928 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-10-15 15:18:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-15 15:18:58,929 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:18:58,929 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:18:58,946 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 15:18:59,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:59,133 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:18:59,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:59,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1663730188, now seen corresponding path program 2 times [2024-10-15 15:18:59,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:18:59,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002317360] [2024-10-15 15:18:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:59,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:18:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:18:59,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984747451] [2024-10-15 15:18:59,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:18:59,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:59,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:18:59,189 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) [2024-10-15 15:18:59,191 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 15:18:59,588 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:18:59,588 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:18:59,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 227 conjuncts are in the unsatisfiable core [2024-10-15 15:18:59,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:18:59,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:59,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:59,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:18:59,618 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 25 treesize of output 19 [2024-10-15 15:18:59,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:18:59,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2510 treesize of output 2478 [2024-10-15 15:18:59,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-10-15 15:19:00,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:19:00,884 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 21 treesize of output 17 [2024-10-15 15:19:00,901 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 21 treesize of output 17 [2024-10-15 15:19:03,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2024-10-15 15:19:03,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:19:03,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:19:03,751 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:19:03,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2024-10-15 15:19:03,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:19:03,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 50 [2024-10-15 15:19:03,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:19:03,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:19:03,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2024-10-15 15:19:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:19:03,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:15,990 WARN L286 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 193 (called from [L 275] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-10-15 15:19:30,495 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse13 (select |c_old(#memory_int#5)| |c_func_to_recursive_line_0_to_41_0_#in~x.base|)) (.cse16 (select (select |c_#memory_int#6| |c_func_to_recursive_line_0_to_41_0_#in~Y.base|) |c_func_to_recursive_line_0_to_41_0_#in~Y.offset|)) (.cse7 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_0_to_41_0_#in~v.base|)) (.cse11 (select |c_old(#memory_int#7)| |c_func_to_recursive_line_0_to_41_0_#in~y.base|))) (let ((.cse12 (select .cse11 |c_func_to_recursive_line_0_to_41_0_#in~y.offset|)) (.cse0 (select (select |c_#memory_int#4| |c_func_to_recursive_line_0_to_41_0_#in~X.base|) |c_func_to_recursive_line_0_to_41_0_#in~X.offset|)) (.cse9 (select .cse7 |c_func_to_recursive_line_0_to_41_0_#in~v.offset|)) (.cse8 (* .cse16 2)) (.cse1 (select .cse13 |c_func_to_recursive_line_0_to_41_0_#in~x.offset|)) (.cse2 (forall ((|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_18| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_26| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_18| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_26| Int)) (let ((.cse17 (select (select |c_#memory_int#7| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_8|)) (.cse19 (select (select |c_#memory_int#5| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_26|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_26|))) (= (let ((.cse18 (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_18|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_18|))) (+ (* .cse17 2) (* (* .cse18 .cse19) 2) (* .cse18 2))) (+ (* 2 (* .cse17 .cse19)) (select (select |c_#memory_int#3| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_22|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_22|) (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_22|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_22|))))))) (and (or (= .cse0 .cse1) .cse2) (forall ((|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_18| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_26| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_18| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_26| Int)) (let ((.cse3 (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_18|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_18|))) (let ((.cse6 (* .cse3 2)) (.cse10 (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_22|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_22|))) (or (not (let ((.cse4 (select (select (store |c_old(#memory_int#5)| |c_func_to_recursive_line_0_to_41_0_#in~x.base| (store .cse13 |c_func_to_recursive_line_0_to_41_0_#in~x.offset| (+ .cse1 1))) |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_26|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_26|)) (.cse5 (select (select (store |c_old(#memory_int#7)| |c_func_to_recursive_line_0_to_41_0_#in~y.base| (store .cse11 |c_func_to_recursive_line_0_to_41_0_#in~y.offset| (+ .cse12 1))) |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_8|))) (= (+ (* 2 (* .cse3 .cse4)) (* 2 .cse5) .cse6) (+ (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_0_to_41_0_#in~v.base| (store .cse7 |c_func_to_recursive_line_0_to_41_0_#in~v.offset| (+ .cse8 .cse9 (* .cse0 (- 2))))) |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_22|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_22|) .cse10 (* (* .cse4 .cse5) 2))))) (let ((.cse14 (select (select |c_#memory_int#7| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_8|)) (.cse15 (select (select |c_#memory_int#5| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_26|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_26|))) (= (+ (* .cse14 2) (* (* .cse3 .cse15) 2) .cse6) (+ (* 2 (* .cse14 .cse15)) (select (select |c_#memory_int#3| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_22|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_22|) .cse10))))))) (or (= (+ (* 2 (* .cse0 .cse12)) .cse0 .cse9) (+ .cse8 (* 2 (* .cse16 .cse1)))) .cse2)))) is different from false [2024-10-15 15:19:32,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:32,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002317360] [2024-10-15 15:19:32,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:32,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984747451] [2024-10-15 15:19:32,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984747451] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:32,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:19:32,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-10-15 15:19:32,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442221672] [2024-10-15 15:19:32,145 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:19:32,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 15:19:32,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:32,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 15:19:32,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=833, Unknown=1, NotChecked=58, Total=992 [2024-10-15 15:19:32,147 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 24 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-15 15:19:37,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:37,392 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2024-10-15 15:19:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-15 15:19:37,394 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2024-10-15 15:19:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:37,395 INFO L225 Difference]: With dead ends: 61 [2024-10-15 15:19:37,395 INFO L226 Difference]: Without dead ends: 55 [2024-10-15 15:19:37,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=190, Invalid=1535, Unknown=1, NotChecked=80, Total=1806 [2024-10-15 15:19:37,396 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:37,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 92 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-10-15 15:19:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-15 15:19:37,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-10-15 15:19:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2024-10-15 15:19:37,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-10-15 15:19:37,425 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 50 [2024-10-15 15:19:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:37,425 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-10-15 15:19:37,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-15 15:19:37,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-10-15 15:19:37,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-15 15:19:37,427 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:37,427 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:19:37,442 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-15 15:19:37,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:37,628 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:37,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1233714779, now seen corresponding path program 3 times [2024-10-15 15:19:37,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:37,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345814974] [2024-10-15 15:19:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:37,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:37,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215199448] [2024-10-15 15:19:37,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 15:19:37,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:37,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:37,704 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) [2024-10-15 15:19:37,705 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 15:19:39,079 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 15:19:39,079 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:19:39,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 288 conjuncts are in the unsatisfiable core [2024-10-15 15:19:39,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:39,108 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 25 treesize of output 19 [2024-10-15 15:19:39,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:19:39,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:19:39,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:19:39,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:19:39,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-10-15 15:19:40,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:19:41,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:41,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:19:42,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:19:42,249 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 65 treesize of output 50 [2024-10-15 15:19:42,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:19:42,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-10-15 15:19:42,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:19:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 15:19:42,541 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:50,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2024-10-15 15:19:50,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2024-10-15 15:19:50,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2024-10-15 15:19:55,015 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse12 (select |c_old(#memory_int#5)| |c_func_to_recursive_line_0_to_41_0_#in~x.base|)) (.cse11 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_0_to_41_0_#in~v.base|))) (let ((.cse0 (forall ((|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_29| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_25| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_29| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_25| Int)) (let ((.cse16 (select (select |c_#memory_int#5| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_34|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_34|)) (.cse15 (select (select |c_#memory_int#7| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_15|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_15|))) (= (let ((.cse14 (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_25|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_25|))) (+ (* 2 .cse14) (* 2 .cse15) (* 2 (* .cse16 .cse14)))) (+ (select (select |c_#memory_int#3| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_29|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_29|) (* 2 (* .cse16 .cse15)) (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_30|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_30|)))))) (.cse1 (select (select |c_#memory_int#4| |c_func_to_recursive_line_0_to_41_0_#in~X.base|) |c_func_to_recursive_line_0_to_41_0_#in~X.offset|)) (.cse3 (select .cse11 |c_func_to_recursive_line_0_to_41_0_#in~v.offset|)) (.cse2 (select .cse12 |c_func_to_recursive_line_0_to_41_0_#in~x.offset|))) (and (or .cse0 (= .cse1 (+ .cse2 1))) (or .cse0 (= (mod (+ .cse1 .cse3) 2) 0)) (forall ((|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_29| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_25| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_34| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_29| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_25| Int)) (let ((.cse7 (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_25|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_25|))) (let ((.cse8 (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_30|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_30|)) (.cse4 (* 2 .cse7))) (or (let ((.cse6 (select (select |c_#memory_int#5| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_34|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_34|)) (.cse5 (select (select |c_#memory_int#7| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_15|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_15|))) (= (+ .cse4 (* 2 .cse5) (* 2 (* .cse6 .cse7))) (+ (select (select |c_#memory_int#3| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_29|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_29|) (* 2 (* .cse6 .cse5)) .cse8))) (not (let ((.cse9 (select (select (store |c_old(#memory_int#7)| |c_func_to_recursive_line_0_to_41_0_#in~y.base| (let ((.cse13 (select |c_old(#memory_int#7)| |c_func_to_recursive_line_0_to_41_0_#in~y.base|))) (store .cse13 |c_func_to_recursive_line_0_to_41_0_#in~y.offset| (+ (select .cse13 |c_func_to_recursive_line_0_to_41_0_#in~y.offset|) 2)))) |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_15|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_15|)) (.cse10 (select (select (store |c_old(#memory_int#5)| |c_func_to_recursive_line_0_to_41_0_#in~x.base| (store .cse12 |c_func_to_recursive_line_0_to_41_0_#in~x.offset| (+ .cse2 2))) |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_34|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_34|))) (= (+ (* 2 (* .cse9 .cse10)) (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_0_to_41_0_#in~v.base| (store .cse11 |c_func_to_recursive_line_0_to_41_0_#in~v.offset| (+ (* (select (select |c_#memory_int#6| |c_func_to_recursive_line_0_to_41_0_#in~Y.base|) |c_func_to_recursive_line_0_to_41_0_#in~Y.offset|) 4) (* .cse1 (- 4)) .cse3))) |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_29|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_29|) .cse8) (+ .cse4 (* .cse9 2) (* 2 (* .cse7 .cse10))))))))))))) is different from false [2024-10-15 15:19:58,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:58,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345814974] [2024-10-15 15:19:58,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:58,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215199448] [2024-10-15 15:19:58,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215199448] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:58,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:19:58,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-10-15 15:19:58,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105046541] [2024-10-15 15:19:58,232 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:19:58,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 15:19:58,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:58,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 15:19:58,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=962, Unknown=1, NotChecked=62, Total=1122 [2024-10-15 15:19:58,234 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-15 15:20:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:03,676 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2024-10-15 15:20:03,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 15:20:03,677 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 64 [2024-10-15 15:20:03,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:03,678 INFO L225 Difference]: With dead ends: 63 [2024-10-15 15:20:03,679 INFO L226 Difference]: Without dead ends: 57 [2024-10-15 15:20:03,679 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=183, Invalid=1800, Unknown=1, NotChecked=86, Total=2070 [2024-10-15 15:20:03,680 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:03,680 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 149 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-10-15 15:20:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-15 15:20:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-10-15 15:20:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2024-10-15 15:20:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-10-15 15:20:03,714 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 64 [2024-10-15 15:20:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:03,714 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-10-15 15:20:03,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-15 15:20:03,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:03,714 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-10-15 15:20:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-15 15:20:03,715 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:03,715 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:03,728 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-15 15:20:03,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-15 15:20:03,916 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:03,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:03,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1218196061, now seen corresponding path program 2 times [2024-10-15 15:20:03,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:03,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021025096] [2024-10-15 15:20:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:03,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:04,978 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:20:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:05,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:20:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:06,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:20:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:06,181 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:20:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:06,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:20:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:06,958 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:20:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:07,557 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:20:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:07,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:20:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:07,582 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:20:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-15 15:20:07,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:07,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021025096] [2024-10-15 15:20:07,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021025096] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:07,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271300573] [2024-10-15 15:20:07,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:20:07,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:07,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:07,586 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) [2024-10-15 15:20:07,588 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 15:20:07,859 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:20:07,860 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:20:07,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-10-15 15:20:07,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:07,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:20:07,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:20:07,902 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 25 treesize of output 19 [2024-10-15 15:20:07,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-10-15 15:20:09,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-10-15 15:20:09,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-15 15:20:11,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-10-15 15:20:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 15:20:12,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:15,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-10-15 15:20:17,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-10-15 15:20:17,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-10-15 15:20:18,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-15 15:20:21,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-10-15 15:20:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 15:20:22,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271300573] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:20:22,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:20:22,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 25] total 54 [2024-10-15 15:20:22,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374769030] [2024-10-15 15:20:22,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:22,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-10-15 15:20:22,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:22,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-10-15 15:20:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2585, Unknown=0, NotChecked=0, Total=2862 [2024-10-15 15:20:22,700 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 54 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 46 states have internal predecessors, (80), 22 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 17 states have call predecessors, (23), 21 states have call successors, (23) [2024-10-15 15:20:28,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:28,869 INFO L93 Difference]: Finished difference Result 82 states and 120 transitions. [2024-10-15 15:20:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 15:20:28,870 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 46 states have internal predecessors, (80), 22 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 17 states have call predecessors, (23), 21 states have call successors, (23) Word has length 64 [2024-10-15 15:20:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:28,871 INFO L225 Difference]: With dead ends: 82 [2024-10-15 15:20:28,871 INFO L226 Difference]: Without dead ends: 76 [2024-10-15 15:20:28,872 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=514, Invalid=3908, Unknown=0, NotChecked=0, Total=4422 [2024-10-15 15:20:28,873 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:28,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 158 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-10-15 15:20:28,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-15 15:20:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2024-10-15 15:20:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 10 states have call successors, (10), 8 states have call predecessors, (10), 12 states have return successors, (28), 13 states have call predecessors, (28), 8 states have call successors, (28) [2024-10-15 15:20:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2024-10-15 15:20:28,912 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 64 [2024-10-15 15:20:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:28,912 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2024-10-15 15:20:28,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 46 states have internal predecessors, (80), 22 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 17 states have call predecessors, (23), 21 states have call successors, (23) [2024-10-15 15:20:28,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2024-10-15 15:20:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-10-15 15:20:28,914 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:28,914 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:28,931 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-15 15:20:29,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-15 15:20:29,115 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:29,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:29,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1426423102, now seen corresponding path program 4 times [2024-10-15 15:20:29,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:29,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875301941] [2024-10-15 15:20:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:29,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:29,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047850668] [2024-10-15 15:20:29,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 15:20:29,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:29,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:29,179 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) [2024-10-15 15:20:29,183 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process