./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.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 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.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 d93bd48e791c000b7768d0e055259ea6d087a487fbdd17b18765993d4c240b84 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 12:39:13,175 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:39:13,235 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:39:13,238 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:39:13,239 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:39:13,263 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:39:13,264 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:39:13,264 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:39:13,265 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:39:13,265 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:39:13,265 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:39:13,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:39:13,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:39:13,267 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:39:13,268 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:39:13,269 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:39:13,269 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:39:13,269 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:39:13,270 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:39:13,270 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:39:13,272 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:39:13,273 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:39:13,273 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:39:13,273 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:39:13,273 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:39:13,273 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:39:13,273 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:39:13,274 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:39:13,274 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:39:13,274 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:39:13,274 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:39:13,274 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:39:13,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:39:13,275 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:39:13,275 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:39:13,275 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:39:13,275 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:39:13,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:39:13,275 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:39:13,276 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:39:13,276 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:39:13,278 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:39:13,278 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d93bd48e791c000b7768d0e055259ea6d087a487fbdd17b18765993d4c240b84 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:39:13,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:39:13,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:39:13,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:39:13,547 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:39:13,548 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:39:13,549 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c [2024-09-21 12:39:14,896 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:39:15,069 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:39:15,069 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c [2024-09-21 12:39:15,079 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/522dab200/90f99a79629448fdaceabcf2bc392bff/FLAG820372847 [2024-09-21 12:39:15,098 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/522dab200/90f99a79629448fdaceabcf2bc392bff [2024-09-21 12:39:15,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:39:15,104 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:39:15,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:39:15,106 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:39:15,112 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:39:15,112 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,113 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56861c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15, skipping insertion in model container [2024-09-21 12:39:15,113 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,136 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:39:15,291 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_lcm2.c[1061,1074] [2024-09-21 12:39:15,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:39:15,328 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:39:15,341 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_lcm2.c[1061,1074] [2024-09-21 12:39:15,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:39:15,375 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:39:15,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15 WrapperNode [2024-09-21 12:39:15,376 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:39:15,377 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:39:15,377 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:39:15,378 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:39:15,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,391 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,422 INFO L138 Inliner]: procedures = 16, calls = 82, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:39:15,425 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:39:15,426 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:39:15,427 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:39:15,428 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:39:15,437 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,441 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,468 INFO L175 MemorySlicer]: Split 51 memory accesses to 8 slices as follows [2, 7, 7, 7, 6, 6, 8, 8]. 16 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 0, 1, 1, 2, 2, 2, 2]. [2024-09-21 12:39:15,468 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,469 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,476 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,482 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,490 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:39:15,495 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:39:15,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:39:15,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:39:15,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (1/1) ... [2024-09-21 12:39:15,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:39:15,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:39:15,528 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 12:39:15,531 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 12:39:15,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:39:15,572 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 12:39:15,572 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 12:39:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:39:15,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:39:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:39:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 12:39:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-21 12:39:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-21 12:39:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-21 12:39:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-21 12:39:15,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-21 12:39:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-21 12:39:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-21 12:39:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 12:39:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 12:39:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-21 12:39:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-21 12:39:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-21 12:39:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-21 12:39:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-21 12:39:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-21 12:39:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:39:15,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:39:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:39:15,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:39:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 12:39:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 12:39:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-21 12:39:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-21 12:39:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-21 12:39:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-21 12:39:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-21 12:39:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-21 12:39:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:39:15,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:39:15,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 12:39:15,579 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_46_0 [2024-09-21 12:39:15,579 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_46_0 [2024-09-21 12:39:15,684 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:39:15,686 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:39:15,921 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-21 12:39:15,921 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:39:15,951 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:39:15,951 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 12:39:15,952 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:15 BoogieIcfgContainer [2024-09-21 12:39:15,952 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:39:15,954 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:39:15,954 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:39:15,957 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:39:15,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:39:15" (1/3) ... [2024-09-21 12:39:15,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d319eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:15, skipping insertion in model container [2024-09-21 12:39:15,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:15" (2/3) ... [2024-09-21 12:39:15,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d319eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:15, skipping insertion in model container [2024-09-21 12:39:15,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:15" (3/3) ... [2024-09-21 12:39:15,961 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm2.c [2024-09-21 12:39:15,977 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:39:15,977 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:39:16,031 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:39:16,041 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@35baeb81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:39:16,042 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:39:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 12:39:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-21 12:39:16,060 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:39:16,060 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:39:16,061 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:39:16,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:39:16,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1231096965, now seen corresponding path program 1 times [2024-09-21 12:39:16,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:39:16,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529445046] [2024-09-21 12:39:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:39:16,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:39:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:39:16,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:39:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:39:16,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:39:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:39:16,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:39:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:39:16,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:39:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:39:16,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:39:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:39:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 12:39:16,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:39:16,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529445046] [2024-09-21 12:39:16,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529445046] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:39:16,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:39:16,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 12:39:16,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091406128] [2024-09-21 12:39:16,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:39:16,346 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 12:39:16,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:39:16,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 12:39:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 12:39:16,373 INFO L87 Difference]: Start difference. First operand has 39 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 12:39:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:39:16,406 INFO L93 Difference]: Finished difference Result 72 states and 97 transitions. [2024-09-21 12:39:16,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 12:39:16,409 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-21 12:39:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:39:16,415 INFO L225 Difference]: With dead ends: 72 [2024-09-21 12:39:16,416 INFO L226 Difference]: Without dead ends: 35 [2024-09-21 12:39:16,419 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 12:39:16,422 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:39:16,425 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:39:16,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-21 12:39:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-21 12:39:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 12:39:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-09-21 12:39:16,509 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 36 [2024-09-21 12:39:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:39:16,510 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-09-21 12:39:16,510 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 12:39:16,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:39:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-09-21 12:39:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-21 12:39:16,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:39:16,514 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:39:16,514 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:39:16,514 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:39:16,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:39:16,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1757352067, now seen corresponding path program 1 times [2024-09-21 12:39:16,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:39:16,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730303627] [2024-09-21 12:39:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:39:16,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:39:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:39:16,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087392124] [2024-09-21 12:39:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:39:16,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:39:16,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:39:16,630 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:39:16,631 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:39:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:39:16,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-21 12:39:17,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:39:17,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:39:17,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:39:17,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:39:17,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:39:17,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:39:17,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:39:17,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:39:17,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:39:17,253 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 10 [2024-09-21 12:39:17,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:39:17,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:39:17,279 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 10 [2024-09-21 12:39:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 12:39:17,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:39:17,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:39:17,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730303627] [2024-09-21 12:39:17,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:39:17,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087392124] [2024-09-21 12:39:17,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087392124] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:39:17,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:39:17,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-21 12:39:17,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238172142] [2024-09-21 12:39:17,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:39:17,339 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:39:17,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:39:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:39:17,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:39:17,340 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-21 12:39:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:39:17,648 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-09-21 12:39:17,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:39:17,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-21 12:39:17,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:39:17,651 INFO L225 Difference]: With dead ends: 50 [2024-09-21 12:39:17,652 INFO L226 Difference]: Without dead ends: 48 [2024-09-21 12:39:17,652 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:39:17,654 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:39:17,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 182 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:39:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-21 12:39:17,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2024-09-21 12:39:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-21 12:39:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2024-09-21 12:39:17,675 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 36 [2024-09-21 12:39:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:39:17,676 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2024-09-21 12:39:17,676 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-21 12:39:17,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:39:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2024-09-21 12:39:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 12:39:17,678 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:39:17,678 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:39:17,687 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:39:17,882 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:39:17,883 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:39:17,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:39:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash -641452916, now seen corresponding path program 1 times [2024-09-21 12:39:17,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:39:17,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929585311] [2024-09-21 12:39:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:39:17,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:39:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:39:17,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980182222] [2024-09-21 12:39:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:39:17,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:39:17,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:39:17,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:39:17,972 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:39:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:39:18,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-09-21 12:39:18,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:39:18,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:39:18,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:39:18,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:39:18,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:39:18,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:39:18,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:39:18,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:39:18,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:39:18,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:39:18,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:39:18,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-21 12:39:18,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-21 12:39:18,940 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 10 [2024-09-21 12:39:18,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-21 12:39:18,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-21 12:39:18,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-21 12:39:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 12:39:18,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:39:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 12:39:21,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:39:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929585311] [2024-09-21 12:39:21,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:39:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980182222] [2024-09-21 12:39:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980182222] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:39:21,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:39:21,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2024-09-21 12:39:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818169188] [2024-09-21 12:39:21,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:39:21,112 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 12:39:21,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:39:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 12:39:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-09-21 12:39:21,113 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-21 12:39:24,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-21 12:39:27,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-21 12:39:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:39:27,568 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2024-09-21 12:39:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 12:39:27,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2024-09-21 12:39:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:39:27,572 INFO L225 Difference]: With dead ends: 60 [2024-09-21 12:39:27,572 INFO L226 Difference]: Without dead ends: 48 [2024-09-21 12:39:27,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2024-09-21 12:39:27,573 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:39:27,573 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 89 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-09-21 12:39:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-21 12:39:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-21 12:39:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-21 12:39:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2024-09-21 12:39:27,600 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 46 [2024-09-21 12:39:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:39:27,600 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2024-09-21 12:39:27,600 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-21 12:39:27,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:39:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2024-09-21 12:39:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-21 12:39:27,601 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:39:27,601 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:39:27,609 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 12:39:27,802 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:39:27,803 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:39:27,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:39:27,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1100455939, now seen corresponding path program 1 times [2024-09-21 12:39:27,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:39:27,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271279643] [2024-09-21 12:39:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:39:27,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:39:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:39:27,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261864894] [2024-09-21 12:39:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:39:27,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:39:27,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:39:27,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:39:27,863 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:39:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:39:30,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-09-21 12:39:30,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:39:30,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:39:30,510 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 [2024-09-21 12:39:30,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:39:30,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:39:30,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:39:30,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:39:34,653 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((v_func_to_recursive_line_35_to_46_0_~b.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~u.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~u.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~b.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~y.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~y.offset_BEFORE_CALL_1 Int)) (let ((.cse0 (select (select |c_#memory_int#3| v_func_to_recursive_line_35_to_46_0_~b.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~b.offset_BEFORE_CALL_1))) (and (= .cse0 (select (select |c_#memory_int#6| v_func_to_recursive_line_35_to_46_0_~y.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~y.offset_BEFORE_CALL_1)) (= .cse0 (select (select |c_#memory_int#4| v_func_to_recursive_line_35_to_46_0_~u.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~u.offset_BEFORE_CALL_1))))) (exists ((v_func_to_recursive_line_35_to_46_0_~v.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~v.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~x.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~x.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~a.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~a.offset_BEFORE_CALL_1 Int)) (let ((.cse1 (select (select |c_#memory_int#2| v_func_to_recursive_line_35_to_46_0_~a.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~a.offset_BEFORE_CALL_1))) (and (= .cse1 (select (select |c_#memory_int#5| v_func_to_recursive_line_35_to_46_0_~v.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~v.offset_BEFORE_CALL_1)) (= (select (select |c_#memory_int#7| v_func_to_recursive_line_35_to_46_0_~x.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~x.offset_BEFORE_CALL_1) .cse1))))) is different from true [2024-09-21 12:39:34,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-21 12:39:34,817 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 35 treesize of output 21 [2024-09-21 12:39:34,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2024-09-21 12:39:34,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2024-09-21 12:39:34,953 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 [2024-09-21 12:39:34,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-21 12:39:34,962 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 43 treesize of output 27 [2024-09-21 12:39:34,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-21 12:39:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 1 not checked. [2024-09-21 12:39:39,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:39:45,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:39:45,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271279643] [2024-09-21 12:39:45,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:39:45,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261864894] [2024-09-21 12:39:45,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261864894] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:39:45,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:39:45,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-21 12:39:45,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454212755] [2024-09-21 12:39:45,423 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:39:45,423 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-21 12:39:45,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:39:45,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-21 12:39:45,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=230, Unknown=2, NotChecked=30, Total=306 [2024-09-21 12:39:45,425 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 14 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-21 12:39:50,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:39:54,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:40:02,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:40:06,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:40:10,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:40:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:40:11,120 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-09-21 12:40:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-21 12:40:11,121 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2024-09-21 12:40:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:40:11,122 INFO L225 Difference]: With dead ends: 66 [2024-09-21 12:40:11,122 INFO L226 Difference]: Without dead ends: 60 [2024-09-21 12:40:11,122 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=81, Invalid=382, Unknown=3, NotChecked=40, Total=506 [2024-09-21 12:40:11,122 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 6 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2024-09-21 12:40:11,123 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 270 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 266 Invalid, 5 Unknown, 78 Unchecked, 21.4s Time] [2024-09-21 12:40:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-21 12:40:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-21 12:40:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-21 12:40:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-21 12:40:11,140 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 47 [2024-09-21 12:40:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:40:11,142 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-21 12:40:11,142 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-21 12:40:11,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-21 12:40:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-21 12:40:11,143 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:40:11,144 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:40:11,154 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:40:11,344 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:40:11,344 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:40:11,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:40:11,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1909802565, now seen corresponding path program 1 times [2024-09-21 12:40:11,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:40:11,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400392027] [2024-09-21 12:40:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:11,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:40:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:40:11,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397862825] [2024-09-21 12:40:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:40:11,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:40:11,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:40:11,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:40:11,415 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:40:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:40:16,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-09-21 12:40:16,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:40:16,381 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 15 treesize of output 1 [2024-09-21 12:40:16,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:40:16,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:40:16,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:40:16,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:40:16,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:40:20,531 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((v_func_to_recursive_line_35_to_46_0_~a.offset_BEFORE_CALL_3 Int) (v_func_to_recursive_line_35_to_46_0_~v.offset_BEFORE_CALL_3 Int) (v_func_to_recursive_line_35_to_46_0_~x.offset_BEFORE_CALL_3 Int) (v_func_to_recursive_line_35_to_46_0_~v.base_BEFORE_CALL_3 Int) (v_func_to_recursive_line_35_to_46_0_~a.base_BEFORE_CALL_3 Int) (v_func_to_recursive_line_35_to_46_0_~x.base_BEFORE_CALL_3 Int)) (let ((.cse0 (select (select |c_#memory_int#2| v_func_to_recursive_line_35_to_46_0_~a.base_BEFORE_CALL_3) v_func_to_recursive_line_35_to_46_0_~a.offset_BEFORE_CALL_3))) (and (= (select (select |c_#memory_int#7| v_func_to_recursive_line_35_to_46_0_~x.base_BEFORE_CALL_3) v_func_to_recursive_line_35_to_46_0_~x.offset_BEFORE_CALL_3) .cse0) (= (select (select |c_#memory_int#5| v_func_to_recursive_line_35_to_46_0_~v.base_BEFORE_CALL_3) v_func_to_recursive_line_35_to_46_0_~v.offset_BEFORE_CALL_3) .cse0)))) (exists ((v_func_to_recursive_line_35_to_46_0_~y.offset_BEFORE_CALL_3 Int) (v_func_to_recursive_line_35_to_46_0_~b.offset_BEFORE_CALL_3 Int) (v_func_to_recursive_line_35_to_46_0_~u.offset_BEFORE_CALL_3 Int) (v_func_to_recursive_line_35_to_46_0_~b.base_BEFORE_CALL_3 Int) (v_func_to_recursive_line_35_to_46_0_~u.base_BEFORE_CALL_3 Int) (v_func_to_recursive_line_35_to_46_0_~y.base_BEFORE_CALL_3 Int)) (let ((.cse1 (select (select |c_#memory_int#3| v_func_to_recursive_line_35_to_46_0_~b.base_BEFORE_CALL_3) v_func_to_recursive_line_35_to_46_0_~b.offset_BEFORE_CALL_3))) (and (= .cse1 (select (select |c_#memory_int#6| v_func_to_recursive_line_35_to_46_0_~y.base_BEFORE_CALL_3) v_func_to_recursive_line_35_to_46_0_~y.offset_BEFORE_CALL_3)) (= .cse1 (select (select |c_#memory_int#4| v_func_to_recursive_line_35_to_46_0_~u.base_BEFORE_CALL_3) v_func_to_recursive_line_35_to_46_0_~u.offset_BEFORE_CALL_3)))))) is different from true [2024-09-21 12:40:20,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-21 12:40:20,720 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 35 treesize of output 21 [2024-09-21 12:40:20,812 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 [2024-09-21 12:40:20,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2024-09-21 12:40:20,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2024-09-21 12:40:20,834 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 60 treesize of output 40 [2024-09-21 12:40:20,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-09-21 12:40:20,845 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 [2024-09-21 12:40:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 1 not checked. [2024-09-21 12:40:24,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:40:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 12:40:30,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:40:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400392027] [2024-09-21 12:40:30,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:40:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397862825] [2024-09-21 12:40:30,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397862825] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:40:30,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:40:30,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2024-09-21 12:40:30,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173124970] [2024-09-21 12:40:30,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:40:30,566 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-21 12:40:30,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:40:30,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-21 12:40:30,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=289, Unknown=2, NotChecked=34, Total=380 [2024-09-21 12:40:30,567 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 20 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 8 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-21 12:40:46,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:40:50,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:41:02,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:41:06,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:41:11,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:41:11,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:41:11,711 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2024-09-21 12:41:11,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-21 12:41:11,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 8 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2024-09-21 12:41:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:41:11,713 INFO L225 Difference]: With dead ends: 76 [2024-09-21 12:41:11,713 INFO L226 Difference]: Without dead ends: 68 [2024-09-21 12:41:11,715 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=129, Invalid=626, Unknown=5, NotChecked=52, Total=812 [2024-09-21 12:41:11,716 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 14 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:41:11,716 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 245 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 297 Invalid, 5 Unknown, 73 Unchecked, 22.1s Time] [2024-09-21 12:41:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-21 12:41:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2024-09-21 12:41:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 15 states have call successors, (15), 11 states have call predecessors, (15), 8 states have return successors, (17), 11 states have call predecessors, (17), 13 states have call successors, (17) [2024-09-21 12:41:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2024-09-21 12:41:11,743 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 47 [2024-09-21 12:41:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:41:11,744 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2024-09-21 12:41:11,744 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 8 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-21 12:41:11,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2024-09-21 12:41:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-21 12:41:11,746 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:41:11,746 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:41:11,755 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-21 12:41:11,949 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:11,949 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:41:11,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:41:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1025657766, now seen corresponding path program 1 times [2024-09-21 12:41:11,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:41:11,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743070071] [2024-09-21 12:41:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:41:11,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:41:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:41:12,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812544290] [2024-09-21 12:41:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:41:12,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:41:12,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:41:12,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:41:12,050 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:41:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:41:13,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 236 conjuncts are in the unsatisfiable core [2024-09-21 12:41:13,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:41:13,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:41:13,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:41:13,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:41:13,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:41:13,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:41:13,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 12:41:13,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:13,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:13,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:13,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:41:18,070 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 54 treesize of output 38 [2024-09-21 12:41:18,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-21 12:41:18,111 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 60 treesize of output 42 [2024-09-21 12:41:18,116 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 54 treesize of output 36 [2024-09-21 12:41:19,213 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 42 treesize of output 30 [2024-09-21 12:41:19,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-21 12:41:19,226 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 72 treesize of output 52 [2024-09-21 12:41:19,229 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 56 treesize of output 36 [2024-09-21 12:41:19,234 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 [2024-09-21 12:41:19,237 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 54 treesize of output 34 [2024-09-21 12:41:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 12:41:19,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:41:38,678 WARN L293 SmtUtils]: Spent 11.22s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-21 12:41:46,981 WARN L293 SmtUtils]: Spent 7.53s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-21 12:43:31,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:43:31,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743070071] [2024-09-21 12:43:31,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:43:31,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812544290] [2024-09-21 12:43:31,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812544290] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:43:31,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:43:31,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-21 12:43:31,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600802797] [2024-09-21 12:43:31,092 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:43:31,092 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-21 12:43:31,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:43:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-21 12:43:31,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=427, Unknown=19, NotChecked=0, Total=506 [2024-09-21 12:43:31,093 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 17 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10)