./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 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_fermat1-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 82b98e74657ce84706a43470df686c21fc227d1db1df507636ad5f146dee0144 --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-de32597-m [2024-09-18 16:48:15,331 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:48:15,399 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:48:15,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:48:15,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:48:15,424 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:48:15,424 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:48:15,425 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:48:15,425 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:48:15,426 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:48:15,426 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:48:15,427 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:48:15,427 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:48:15,428 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:48:15,428 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:48:15,429 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:48:15,429 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:48:15,429 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:48:15,430 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:48:15,430 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:48:15,430 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:48:15,431 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:48:15,431 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:48:15,431 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:48:15,432 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:48:15,432 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:48:15,432 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:48:15,433 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:48:15,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:48:15,433 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:48:15,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:48:15,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:48:15,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:48:15,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:48:15,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:48:15,435 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:48:15,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:48:15,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:48:15,436 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:48:15,436 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:48:15,436 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:48:15,437 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:48:15,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82b98e74657ce84706a43470df686c21fc227d1db1df507636ad5f146dee0144 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:48:15,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:48:15,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:48:15,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:48:15,701 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:48:15,702 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:48:15,703 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c [2024-09-18 16:48:17,039 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:48:17,228 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:48:17,228 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c [2024-09-18 16:48:17,238 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7cef83b76/0962844c4edc47eebe248ca41806b42c/FLAG3a3bb4177 [2024-09-18 16:48:17,249 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7cef83b76/0962844c4edc47eebe248ca41806b42c [2024-09-18 16:48:17,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:48:17,253 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:48:17,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:48:17,255 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:48:17,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:48:17,262 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,263 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd715c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17, skipping insertion in model container [2024-09-18 16:48:17,263 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,285 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:48:17,444 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_fermat1-ll.c[1101,1114] [2024-09-18 16:48:17,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:48:17,498 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:48:17,509 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_fermat1-ll.c[1101,1114] [2024-09-18 16:48:17,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:48:17,546 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:48:17,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17 WrapperNode [2024-09-18 16:48:17,546 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:48:17,547 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:48:17,547 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:48:17,548 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:48:17,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,559 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,565 INFO L138 Inliner]: procedures = 18, calls = 82, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:48:17,566 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:48:17,566 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:48:17,566 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:48:17,567 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:48:17,575 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,577 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,599 INFO L175 MemorySlicer]: Split 53 memory accesses to 5 slices as follows [2, 11, 8, 16, 16]. 30 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 3, 1, 2, 2]. [2024-09-18 16:48:17,600 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,600 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,608 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,610 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,612 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,616 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:48:17,616 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:48:17,617 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:48:17,617 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:48:17,618 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (1/1) ... [2024-09-18 16:48:17,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:48:17,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:17,648 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) [2024-09-18 16:48:17,653 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 [2024-09-18 16:48:17,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:48:17,709 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_36_0 [2024-09-18 16:48:17,709 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_36_0 [2024-09-18 16:48:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:48:17,710 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:48:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:48:17,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:48:17,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:48:17,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-18 16:48:17,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-18 16:48:17,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-18 16:48:17,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-18 16:48:17,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-18 16:48:17,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-18 16:48:17,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-18 16:48:17,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-18 16:48:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-18 16:48:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-18 16:48:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_43_0 [2024-09-18 16:48:17,714 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_43_0 [2024-09-18 16:48:17,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:48:17,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:48:17,715 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_46_to_51_0 [2024-09-18 16:48:17,715 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_46_to_51_0 [2024-09-18 16:48:17,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:48:17,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:48:17,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-18 16:48:17,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-18 16:48:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-18 16:48:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-18 16:48:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-18 16:48:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:48:17,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:48:17,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-18 16:48:17,818 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:48:17,820 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:48:18,088 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-18 16:48:18,092 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:48:18,117 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:48:18,119 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-18 16:48:18,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:48:18 BoogieIcfgContainer [2024-09-18 16:48:18,119 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:48:18,122 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:48:18,122 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:48:18,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:48:18,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:48:17" (1/3) ... [2024-09-18 16:48:18,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a3ac93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:48:18, skipping insertion in model container [2024-09-18 16:48:18,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:17" (2/3) ... [2024-09-18 16:48:18,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a3ac93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:48:18, skipping insertion in model container [2024-09-18 16:48:18,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:48:18" (3/3) ... [2024-09-18 16:48:18,130 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_fermat1-ll.c [2024-09-18 16:48:18,142 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:48:18,142 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:48:18,184 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:48:18,190 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;@2bc9f458, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:48:18,190 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:48:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 33 states have internal predecessors, (38), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-18 16:48:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-18 16:48:18,199 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:18,199 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:48:18,199 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:18,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:18,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1756339989, now seen corresponding path program 1 times [2024-09-18 16:48:18,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:18,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153577389] [2024-09-18 16:48:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:18,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:48:18,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370935050] [2024-09-18 16:48:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:18,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:18,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:18,402 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) [2024-09-18 16:48:18,404 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:48:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:18,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-18 16:48:18,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:18,598 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 [2024-09-18 16:48:18,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:48:18,638 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 [2024-09-18 16:48:18,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:48:18,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-09-18 16:48:19,000 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 35 treesize of output 27 [2024-09-18 16:48:19,014 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 32 [2024-09-18 16:48:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:48:19,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:48:19,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:19,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153577389] [2024-09-18 16:48:19,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:48:19,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370935050] [2024-09-18 16:48:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370935050] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:48:19,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:48:19,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-18 16:48:19,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736900904] [2024-09-18 16:48:19,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:48:19,149 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:48:19,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:48:19,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:48:19,175 INFO L87 Difference]: Start difference. First operand has 52 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 33 states have internal predecessors, (38), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 16:48:19,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:19,863 INFO L93 Difference]: Finished difference Result 111 states and 156 transitions. [2024-09-18 16:48:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 16:48:19,868 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-09-18 16:48:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:19,877 INFO L225 Difference]: With dead ends: 111 [2024-09-18 16:48:19,877 INFO L226 Difference]: Without dead ends: 61 [2024-09-18 16:48:19,881 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:48:19,886 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 16:48:19,886 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 316 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 16:48:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-18 16:48:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2024-09-18 16:48:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 39 states have internal predecessors, (40), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-18 16:48:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2024-09-18 16:48:19,936 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 24 [2024-09-18 16:48:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:19,937 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2024-09-18 16:48:19,937 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 16:48:19,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2024-09-18 16:48:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-18 16:48:19,940 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:19,940 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:48:19,949 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 16:48:20,144 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-09-18 16:48:20,145 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:20,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash 454145308, now seen corresponding path program 1 times [2024-09-18 16:48:20,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:20,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827319838] [2024-09-18 16:48:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:20,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:48:20,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792641470] [2024-09-18 16:48:20,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:20,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:20,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:20,205 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) [2024-09-18 16:48:20,209 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:48:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:20,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-18 16:48:20,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:20,369 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 [2024-09-18 16:48:20,383 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 11 treesize of output 7 [2024-09-18 16:48:20,391 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 21 treesize of output 15 [2024-09-18 16:48:20,397 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 [2024-09-18 16:48:20,865 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 39 treesize of output 31 [2024-09-18 16:48:20,874 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 35 treesize of output 27 [2024-09-18 16:48:20,879 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 32 [2024-09-18 16:48:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:48:20,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:48:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:48:25,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:25,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827319838] [2024-09-18 16:48:25,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:48:25,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792641470] [2024-09-18 16:48:25,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792641470] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 16:48:25,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:48:25,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 17 [2024-09-18 16:48:25,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244118169] [2024-09-18 16:48:25,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:48:25,959 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-18 16:48:25,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-18 16:48:25,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-09-18 16:48:25,961 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:48:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:26,641 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2024-09-18 16:48:26,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 16:48:26,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-09-18 16:48:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:26,644 INFO L225 Difference]: With dead ends: 78 [2024-09-18 16:48:26,644 INFO L226 Difference]: Without dead ends: 76 [2024-09-18 16:48:26,645 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-09-18 16:48:26,648 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 16:48:26,648 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 330 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 16:48:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-18 16:48:26,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-18 16:48:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 50 states have internal predecessors, (50), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-18 16:48:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2024-09-18 16:48:26,680 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 34 [2024-09-18 16:48:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:26,680 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2024-09-18 16:48:26,680 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:48:26,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2024-09-18 16:48:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-18 16:48:26,683 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:26,683 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:48:26,700 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 16:48:26,885 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:26,885 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:26,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1053338002, now seen corresponding path program 1 times [2024-09-18 16:48:26,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:26,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207354453] [2024-09-18 16:48:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:26,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:48:26,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526443653] [2024-09-18 16:48:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:26,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:26,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:26,972 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) [2024-09-18 16:48:26,974 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:48:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:27,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-18 16:48:27,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:27,092 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 [2024-09-18 16:48:27,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:48:27,346 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 [2024-09-18 16:48:27,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:48:27,456 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 31 treesize of output 27 [2024-09-18 16:48:27,464 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 45 treesize of output 29 [2024-09-18 16:48:28,433 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 91 treesize of output 55 [2024-09-18 16:48:28,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:48:28,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 102 [2024-09-18 16:48:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:48:28,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:48:33,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:33,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207354453] [2024-09-18 16:48:33,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:48:33,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526443653] [2024-09-18 16:48:33,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526443653] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:48:33,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:48:33,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-18 16:48:33,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869320323] [2024-09-18 16:48:33,516 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:48:33,516 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 16:48:33,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:33,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 16:48:33,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-09-18 16:48:33,518 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 16:48:37,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:48:41,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:48:45,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:48:49,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:48:54,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:48:59,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:03,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:49:04,776 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2024-09-18 16:49:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-18 16:49:04,777 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 34 [2024-09-18 16:49:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:49:04,780 INFO L225 Difference]: With dead ends: 94 [2024-09-18 16:49:04,780 INFO L226 Difference]: Without dead ends: 84 [2024-09-18 16:49:04,781 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 16:49:04,781 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 29 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.5s IncrementalHoareTripleChecker+Time [2024-09-18 16:49:04,782 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 141 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 710 Invalid, 6 Unknown, 0 Unchecked, 30.5s Time] [2024-09-18 16:49:04,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-18 16:49:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-09-18 16:49:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 54 states have internal predecessors, (54), 20 states have call successors, (20), 12 states have call predecessors, (20), 14 states have return successors, (29), 18 states have call predecessors, (29), 18 states have call successors, (29) [2024-09-18 16:49:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2024-09-18 16:49:04,821 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 34 [2024-09-18 16:49:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:49:04,821 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2024-09-18 16:49:04,821 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 16:49:04,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2024-09-18 16:49:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 16:49:04,823 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:49:04,823 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:49:04,836 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 16:49:05,024 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-09-18 16:49:05,024 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:49:05,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1993728975, now seen corresponding path program 1 times [2024-09-18 16:49:05,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:49:05,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361811942] [2024-09-18 16:49:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:05,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:49:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:49:05,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202311245] [2024-09-18 16:49:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:05,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:49:05,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:49:05,111 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) [2024-09-18 16:49:05,112 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:49:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:05,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-18 16:49:05,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:49:05,254 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 [2024-09-18 16:49:05,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:49:05,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:49:05,269 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 [2024-09-18 16:49:05,502 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 35 treesize of output 31 [2024-09-18 16:49:05,714 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 35 [2024-09-18 16:49:05,720 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 39 treesize of output 31 [2024-09-18 16:49:05,725 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 36 [2024-09-18 16:49:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:49:05,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:49:10,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:49:10,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361811942] [2024-09-18 16:49:10,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:49:10,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202311245] [2024-09-18 16:49:10,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202311245] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:49:10,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:49:10,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-18 16:49:10,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393681089] [2024-09-18 16:49:10,587 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:49:10,588 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 16:49:10,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:49:10,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 16:49:10,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-09-18 16:49:10,589 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-18 16:49:15,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:19,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:49:19,320 INFO L93 Difference]: Finished difference Result 160 states and 200 transitions. [2024-09-18 16:49:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 16:49:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-09-18 16:49:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:49:19,324 INFO L225 Difference]: With dead ends: 160 [2024-09-18 16:49:19,324 INFO L226 Difference]: Without dead ends: 154 [2024-09-18 16:49:19,325 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2024-09-18 16:49:19,326 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 128 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 81 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:49:19,326 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 196 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 404 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2024-09-18 16:49:19,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-09-18 16:49:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2024-09-18 16:49:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 97 states have internal predecessors, (101), 35 states have call successors, (35), 21 states have call predecessors, (35), 24 states have return successors, (52), 33 states have call predecessors, (52), 32 states have call successors, (52) [2024-09-18 16:49:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2024-09-18 16:49:19,415 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 46 [2024-09-18 16:49:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:49:19,416 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2024-09-18 16:49:19,416 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-18 16:49:19,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2024-09-18 16:49:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-18 16:49:19,420 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:49:19,420 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:49:19,433 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 16:49:19,620 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:49:19,621 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:49:19,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:19,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1900943677, now seen corresponding path program 1 times [2024-09-18 16:49:19,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:49:19,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839868466] [2024-09-18 16:49:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:19,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:49:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:20,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:49:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:20,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:49:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:20,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:49:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:20,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 16:49:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:20,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 16:49:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:20,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:49:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:20,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 16:49:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:20,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-18 16:49:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 16:49:20,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:49:20,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839868466] [2024-09-18 16:49:20,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839868466] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:49:20,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:49:20,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-18 16:49:20,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829933728] [2024-09-18 16:49:20,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:49:20,662 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-18 16:49:20,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:49:20,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-18 16:49:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-18 16:49:20,663 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-18 16:49:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:49:21,239 INFO L93 Difference]: Finished difference Result 238 states and 304 transitions. [2024-09-18 16:49:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 16:49:21,240 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2024-09-18 16:49:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:49:21,242 INFO L225 Difference]: With dead ends: 238 [2024-09-18 16:49:21,242 INFO L226 Difference]: Without dead ends: 139 [2024-09-18 16:49:21,243 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-09-18 16:49:21,244 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:49:21,244 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 99 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 16:49:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-18 16:49:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-09-18 16:49:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 91 states have internal predecessors, (95), 30 states have call successors, (30), 20 states have call predecessors, (30), 23 states have return successors, (40), 27 states have call predecessors, (40), 27 states have call successors, (40) [2024-09-18 16:49:21,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 165 transitions. [2024-09-18 16:49:21,309 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 165 transitions. Word has length 58 [2024-09-18 16:49:21,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:49:21,309 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 165 transitions. [2024-09-18 16:49:21,309 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-18 16:49:21,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 165 transitions. [2024-09-18 16:49:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-18 16:49:21,311 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:49:21,311 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:49:21,311 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-18 16:49:21,312 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:49:21,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:21,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1638594499, now seen corresponding path program 1 times [2024-09-18 16:49:21,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:49:21,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814140209] [2024-09-18 16:49:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:21,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:49:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:49:21,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959147610] [2024-09-18 16:49:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:21,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:49:21,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:49:21,350 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) [2024-09-18 16:49:21,354 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:49:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:21,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-09-18 16:49:21,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:49:21,541 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 [2024-09-18 16:49:21,545 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 [2024-09-18 16:49:21,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:49:21,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:49:21,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:49:21,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2024-09-18 16:49:22,337 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-18 16:49:22,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-18 16:49:22,368 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-18 16:49:22,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 91 [2024-09-18 16:49:23,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:49:23,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 148 treesize of output 236 [2024-09-18 16:49:23,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:49:23,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 201 [2024-09-18 16:49:24,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:49:24,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 52 [2024-09-18 16:49:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-18 16:49:24,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:49:25,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:49:25,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814140209] [2024-09-18 16:49:25,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:49:25,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959147610] [2024-09-18 16:49:25,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959147610] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:49:25,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:49:25,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-18 16:49:25,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392931908] [2024-09-18 16:49:25,187 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:49:25,187 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 16:49:25,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:49:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 16:49:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2024-09-18 16:49:25,188 INFO L87 Difference]: Start difference. First operand 139 states and 165 transitions. Second operand has 21 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-18 16:49:30,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:34,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:38,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:46,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:51,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:55,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:59,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:04,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:50:05,053 INFO L93 Difference]: Finished difference Result 205 states and 248 transitions. [2024-09-18 16:50:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 16:50:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 58 [2024-09-18 16:50:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:50:05,056 INFO L225 Difference]: With dead ends: 205 [2024-09-18 16:50:05,056 INFO L226 Difference]: Without dead ends: 201 [2024-09-18 16:50:05,058 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2024-09-18 16:50:05,058 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 96 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 55 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.7s IncrementalHoareTripleChecker+Time [2024-09-18 16:50:05,059 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 425 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 838 Invalid, 12 Unknown, 0 Unchecked, 35.7s Time] [2024-09-18 16:50:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-18 16:50:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2024-09-18 16:50:05,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 122 states have (on average 1.1229508196721312) internal successors, (137), 129 states have internal predecessors, (137), 42 states have call successors, (42), 28 states have call predecessors, (42), 33 states have return successors, (60), 40 states have call predecessors, (60), 38 states have call successors, (60) [2024-09-18 16:50:05,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2024-09-18 16:50:05,157 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 58 [2024-09-18 16:50:05,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:50:05,158 INFO L474 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2024-09-18 16:50:05,158 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-18 16:50:05,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:50:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2024-09-18 16:50:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-18 16:50:05,160 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:50:05,160 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:50:05,174 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-18 16:50:05,361 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 16:50:05,361 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:50:05,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:50:05,362 INFO L85 PathProgramCache]: Analyzing trace with hash 336534583, now seen corresponding path program 2 times [2024-09-18 16:50:05,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:50:05,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45543592] [2024-09-18 16:50:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:50:05,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:50:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:50:05,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893006248] [2024-09-18 16:50:05,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:50:05,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:50:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:50:05,404 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:50:05,405 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 16:50:05,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:50:05,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:50:05,651 WARN L260 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 293 conjuncts are in the unsatisfiable core [2024-09-18 16:50:05,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:50:05,666 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 [2024-09-18 16:50:05,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:50:05,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:50:05,970 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 [2024-09-18 16:50:14,928 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 35 treesize of output 31 [2024-09-18 16:50:21,575 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 44 [2024-09-18 16:50:21,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-18 16:50:24,367 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 52 treesize of output 40 [2024-09-18 16:50:24,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:50:24,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 105 [2024-09-18 16:50:24,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:50:24,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 82 [2024-09-18 16:50:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-18 16:50:24,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:50:39,691 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse7 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_38_to_43_0_#in~v.base|)) (.cse1 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_38_to_43_0_#in~r.base|))) (let ((.cse3 (select .cse1 |c_func_to_recursive_line_38_to_43_0_#in~r.offset|)) (.cse2 (select .cse7 |c_func_to_recursive_line_38_to_43_0_#in~v.offset|)) (.cse10 (forall ((|v_func_to_recursive_line_38_to_43_0_#in~r.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~A.base_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_38_to_43_0_#in~r.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~u.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_38_to_43_0_#in~A.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_38_to_43_0_#in~v.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~v.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~u.base_BEFORE_CALL_6| Int)) (let ((.cse12 (select (select |c_#memory_int#4| |v_func_to_recursive_line_38_to_43_0_#in~u.base_BEFORE_CALL_6|) |v_func_to_recursive_line_38_to_43_0_#in~u.offset_BEFORE_CALL_6|)) (.cse13 (select (select |c_#memory_int#3| |v_func_to_recursive_line_38_to_43_0_#in~v.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~v.offset_BEFORE_CALL_8|))) (= (+ (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_38_to_43_0_#in~r.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~r.offset_BEFORE_CALL_8|) 4) (* 2 .cse12) (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_38_to_43_0_#in~A.base_BEFORE_CALL_6|) |v_func_to_recursive_line_38_to_43_0_#in~A.offset_BEFORE_CALL_6|) 4) (* .cse13 .cse13)) (+ (* .cse12 .cse12) (* 2 .cse13))))))) (and (forall ((|v_func_to_recursive_line_38_to_43_0_#in~r.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~A.base_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_38_to_43_0_#in~r.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~u.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_38_to_43_0_#in~A.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_38_to_43_0_#in~v.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~v.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~u.base_BEFORE_CALL_6| Int)) (let ((.cse9 (select (select |c_#memory_int#4| |v_func_to_recursive_line_38_to_43_0_#in~u.base_BEFORE_CALL_6|) |v_func_to_recursive_line_38_to_43_0_#in~u.offset_BEFORE_CALL_6|))) (let ((.cse4 (* 2 .cse9)) (.cse5 (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_38_to_43_0_#in~A.base_BEFORE_CALL_6|) |v_func_to_recursive_line_38_to_43_0_#in~A.offset_BEFORE_CALL_6|) 4)) (.cse6 (* .cse9 .cse9))) (or (not (let ((.cse0 (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_38_to_43_0_#in~v.base| (store .cse7 |c_func_to_recursive_line_38_to_43_0_#in~v.offset| (+ 2 .cse2))) |v_func_to_recursive_line_38_to_43_0_#in~v.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~v.offset_BEFORE_CALL_8|))) (= (+ (* .cse0 .cse0) (* (select (select (store |c_old(#memory_int#1)| |c_func_to_recursive_line_38_to_43_0_#in~r.base| (store .cse1 |c_func_to_recursive_line_38_to_43_0_#in~r.offset| (+ (* (- 1) .cse2) .cse3))) |v_func_to_recursive_line_38_to_43_0_#in~r.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~r.offset_BEFORE_CALL_8|) 4) .cse4 .cse5) (+ .cse6 (* 2 .cse0))))) (let ((.cse8 (select (select |c_#memory_int#3| |v_func_to_recursive_line_38_to_43_0_#in~v.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~v.offset_BEFORE_CALL_8|))) (= (+ (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_38_to_43_0_#in~r.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~r.offset_BEFORE_CALL_8|) 4) .cse4 .cse5 (* .cse8 .cse8)) (+ .cse6 (* 2 .cse8)))))))) (or (< 0 .cse3) .cse10) (or (let ((.cse11 (select (select |c_#memory_int#4| |c_func_to_recursive_line_38_to_43_0_#in~u.base|) |c_func_to_recursive_line_38_to_43_0_#in~u.offset|))) (= (+ (* .cse11 .cse11) (* 2 .cse2)) (+ (* (select (select |c_#memory_int#2| |c_func_to_recursive_line_38_to_43_0_#in~A.base|) |c_func_to_recursive_line_38_to_43_0_#in~A.offset|) 4) (* 2 .cse11) (* 4 .cse3) (* .cse2 .cse2)))) .cse10)))) is different from false [2024-09-18 16:50:44,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:50:44,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45543592] [2024-09-18 16:50:44,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:50:44,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893006248] [2024-09-18 16:50:44,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893006248] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:50:44,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:50:44,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2024-09-18 16:50:44,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081827870] [2024-09-18 16:50:44,100 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:50:44,100 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-18 16:50:44,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:50:44,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-18 16:50:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1641, Unknown=3, NotChecked=82, Total=1892 [2024-09-18 16:50:44,102 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand has 34 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 12 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-18 16:50:48,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:52,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:56,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:00,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:08,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:14,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:19,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:23,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:31,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:35,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:37,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:51:37,193 INFO L93 Difference]: Finished difference Result 220 states and 269 transitions. [2024-09-18 16:51:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-18 16:51:37,194 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 12 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 70 [2024-09-18 16:51:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:51:37,196 INFO L225 Difference]: With dead ends: 220 [2024-09-18 16:51:37,196 INFO L226 Difference]: Without dead ends: 218 [2024-09-18 16:51:37,198 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=437, Invalid=4120, Unknown=3, NotChecked=132, Total=4692 [2024-09-18 16:51:37,199 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 132 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 59 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:51:37,199 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 445 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1680 Invalid, 13 Unknown, 0 Unchecked, 44.2s Time] [2024-09-18 16:51:37,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-18 16:51:37,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2024-09-18 16:51:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 133 states have (on average 1.1203007518796992) internal successors, (149), 140 states have internal predecessors, (149), 45 states have call successors, (45), 31 states have call predecessors, (45), 36 states have return successors, (68), 43 states have call predecessors, (68), 41 states have call successors, (68) [2024-09-18 16:51:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 262 transitions. [2024-09-18 16:51:37,360 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 262 transitions. Word has length 70 [2024-09-18 16:51:37,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:51:37,361 INFO L474 AbstractCegarLoop]: Abstraction has 215 states and 262 transitions. [2024-09-18 16:51:37,361 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 12 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-18 16:51:37,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 262 transitions. [2024-09-18 16:51:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-18 16:51:37,363 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:51:37,363 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1] [2024-09-18 16:51:37,371 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 16:51:37,563 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:51:37,564 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:51:37,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:37,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1164971733, now seen corresponding path program 3 times [2024-09-18 16:51:37,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:51:37,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51937031] [2024-09-18 16:51:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:51:37,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:51:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:51:37,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226131718] [2024-09-18 16:51:37,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 16:51:37,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:51:37,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:51:37,607 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:51:37,608 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 16:51:38,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-18 16:51:38,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:51:38,049 WARN L260 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 304 conjuncts are in the unsatisfiable core [2024-09-18 16:51:38,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:51:38,069 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 [2024-09-18 16:51:38,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:51:38,115 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 [2024-09-18 16:51:38,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:51:38,461 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 31 treesize of output 27 [2024-09-18 16:51:40,508 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 49 treesize of output 37 [2024-09-18 16:51:41,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-18 16:51:48,846 WARN L293 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 51 DAG size of output: 48 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 16:51:49,122 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 40 treesize of output 32 [2024-09-18 16:51:49,131 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 28 [2024-09-18 16:51:49,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:51:49,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 50 [2024-09-18 16:51:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-18 16:51:52,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:52:06,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:52:06,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51937031] [2024-09-18 16:52:06,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:52:06,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226131718] [2024-09-18 16:52:06,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226131718] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:52:06,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:52:06,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-18 16:52:06,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295087624] [2024-09-18 16:52:06,315 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:52:06,315 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-18 16:52:06,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:52:06,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-18 16:52:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=892, Unknown=2, NotChecked=0, Total=992 [2024-09-18 16:52:06,317 INFO L87 Difference]: Start difference. First operand 215 states and 262 transitions. Second operand has 25 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-18 16:52:12,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:52:27,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:52:31,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:52:35,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:52:39,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:52:43,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]