./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.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 e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 16:40:57,329 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:40:57,384 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:40:57,389 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:40:57,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:40:57,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:40:57,418 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:40:57,419 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:40:57,421 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:40:57,421 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:40:57,421 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:40:57,421 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:40:57,422 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:40:57,422 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:40:57,422 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:40:57,422 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:40:57,423 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:40:57,423 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:40:57,427 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:40:57,427 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:40:57,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:40:57,428 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:40:57,428 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:40:57,428 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:40:57,428 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:40:57,429 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:40:57,431 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:40:57,432 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:40:57,432 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:40:57,432 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:40:57,432 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:40:57,432 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:40:57,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:40:57,433 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:40:57,433 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:40:57,433 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:40:57,433 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:40:57,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:40:57,433 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:40:57,433 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:40:57,433 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:40:57,434 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:40:57,434 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:40:57,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:40:57,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:40:57,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:40:57,732 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:40:57,733 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:40:57,734 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-09-12 16:40:59,019 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:40:59,237 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:40:59,237 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-09-12 16:40:59,243 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1bc495142/335a96a44a124576b39b97b1ca7e1fea/FLAG7c4a1a01b [2024-09-12 16:40:59,255 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1bc495142/335a96a44a124576b39b97b1ca7e1fea [2024-09-12 16:40:59,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:40:59,258 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:40:59,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:40:59,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:40:59,267 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:40:59,268 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191607ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59, skipping insertion in model container [2024-09-12 16:40:59,272 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,294 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:40:59,419 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c[1106,1119] [2024-09-12 16:40:59,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:40:59,473 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:40:59,487 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c[1106,1119] [2024-09-12 16:40:59,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:40:59,528 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:40:59,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59 WrapperNode [2024-09-12 16:40:59,529 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:40:59,530 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:40:59,530 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:40:59,530 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:40:59,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,547 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,556 INFO L138 Inliner]: procedures = 18, calls = 104, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:40:59,557 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:40:59,567 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:40:59,567 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:40:59,568 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:40:59,585 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,594 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,645 INFO L175 MemorySlicer]: Split 66 memory accesses to 8 slices as follows [2, 8, 7, 11, 13, 8, 8, 9]. 20 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 0, 7, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 1, 0, 2, 2, 2, 2, 1]. [2024-09-12 16:40:59,645 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,646 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,657 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,661 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,663 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,664 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,670 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:40:59,671 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:40:59,671 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:40:59,671 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:40:59,672 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (1/1) ... [2024-09-12 16:40:59,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:40:59,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:40:59,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 16:40:59,710 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 16:40:59,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:40:59,752 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_38_0 [2024-09-12 16:40:59,752 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_38_0 [2024-09-12 16:40:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_48_to_53_0 [2024-09-12 16:40:59,753 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_48_to_53_0 [2024-09-12 16:40:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 16:40:59,753 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 16:40:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:40:59,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:40:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:40:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 16:40:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-12 16:40:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-12 16:40:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-12 16:40:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-12 16:40:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-12 16:40:59,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-12 16:40:59,756 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_45_0 [2024-09-12 16:40:59,756 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_45_0 [2024-09-12 16:40:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-12 16:40:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-12 16:40:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-12 16:40:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-12 16:40:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-12 16:40:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-12 16:40:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-12 16:40:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-12 16:40:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-12 16:40:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:40:59,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:40:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:40:59,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:40:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-12 16:40:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-12 16:40:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-12 16:40:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-12 16:40:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-12 16:40:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-12 16:40:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-12 16:40:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-12 16:40:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 16:40:59,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 16:40:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-12 16:40:59,881 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:40:59,883 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:41:00,187 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-12 16:41:00,187 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:41:00,204 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:41:00,204 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-12 16:41:00,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:41:00 BoogieIcfgContainer [2024-09-12 16:41:00,204 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:41:00,212 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:41:00,213 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:41:00,215 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:41:00,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:40:59" (1/3) ... [2024-09-12 16:41:00,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9196a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:41:00, skipping insertion in model container [2024-09-12 16:41:00,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:40:59" (2/3) ... [2024-09-12 16:41:00,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9196a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:41:00, skipping insertion in model container [2024-09-12 16:41:00,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:41:00" (3/3) ... [2024-09-12 16:41:00,219 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm1.c [2024-09-12 16:41:00,235 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:41:00,235 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 16:41:00,294 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:41:00,301 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;@422983b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:41:00,301 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 16:41:00,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 16:41:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 16:41:00,314 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:41:00,315 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:41:00,316 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:41:00,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:41:00,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1037831488, now seen corresponding path program 1 times [2024-09-12 16:41:00,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:41:00,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051652243] [2024-09-12 16:41:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:41:00,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:41:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:41:00,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:41:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:41:00,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:41:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:41:00,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:41:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:41:00,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 16:41:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:41:00,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:41:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:41:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 16:41:00,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:41:00,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051652243] [2024-09-12 16:41:00,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051652243] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:41:00,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:41:00,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 16:41:00,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777869759] [2024-09-12 16:41:00,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:41:00,610 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 16:41:00,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:41:00,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 16:41:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 16:41:00,632 INFO L87 Difference]: Start difference. First operand has 58 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 16:41:00,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:41:00,669 INFO L93 Difference]: Finished difference Result 110 states and 158 transitions. [2024-09-12 16:41:00,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 16:41:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-12 16:41:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:41:00,678 INFO L225 Difference]: With dead ends: 110 [2024-09-12 16:41:00,678 INFO L226 Difference]: Without dead ends: 54 [2024-09-12 16:41:00,682 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 16:41:00,687 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:41:00,688 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:41:00,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-12 16:41:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-12 16:41:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 34 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 16:41:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-12 16:41:00,738 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 36 [2024-09-12 16:41:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:41:00,740 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-12 16:41:00,740 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 16:41:00,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:41:00,741 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-12 16:41:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 16:41:00,742 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:41:00,742 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:41:00,742 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:41:00,742 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:41:00,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:41:00,743 INFO L85 PathProgramCache]: Analyzing trace with hash -268686776, now seen corresponding path program 1 times [2024-09-12 16:41:00,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:41:00,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447902596] [2024-09-12 16:41:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:41:00,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:41:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:41:00,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355747115] [2024-09-12 16:41:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:41:00,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:41:00,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:41:00,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:41:00,862 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 16:41:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:41:01,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-12 16:41:01,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:41:01,127 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 [2024-09-12 16:41:01,130 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 [2024-09-12 16:41:01,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:41:01,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:41:01,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:41:01,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-12 16:41:01,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-12 16:41:01,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-12 16:41:01,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-12 16:41:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 16:41:01,366 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 16:41:01,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:41:01,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447902596] [2024-09-12 16:41:01,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:41:01,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355747115] [2024-09-12 16:41:01,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355747115] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:41:01,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:41:01,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 16:41:01,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508218269] [2024-09-12 16:41:01,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:41:01,369 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:41:01,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:41:01,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:41:01,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:41:01,370 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-12 16:41:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:41:01,644 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-09-12 16:41:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:41:01,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-12 16:41:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:41:01,649 INFO L225 Difference]: With dead ends: 69 [2024-09-12 16:41:01,649 INFO L226 Difference]: Without dead ends: 67 [2024-09-12 16:41:01,650 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:41:01,650 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 14 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:41:01,651 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 348 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:41:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-12 16:41:01,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-12 16:41:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 38 states have (on average 1.131578947368421) internal successors, (43), 42 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-12 16:41:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-09-12 16:41:01,668 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 36 [2024-09-12 16:41:01,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:41:01,669 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-09-12 16:41:01,669 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-12 16:41:01,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:41:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-09-12 16:41:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 16:41:01,671 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:41:01,671 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:41:01,678 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 16:41:01,871 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:41:01,872 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:41:01,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:41:01,872 INFO L85 PathProgramCache]: Analyzing trace with hash -670583387, now seen corresponding path program 1 times [2024-09-12 16:41:01,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:41:01,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381402228] [2024-09-12 16:41:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:41:01,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:41:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:41:01,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208590554] [2024-09-12 16:41:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:41:01,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:41:01,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:41:01,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:41:01,975 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 16:41:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:41:02,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-09-12 16:41:02,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:41:02,209 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 [2024-09-12 16:41:02,213 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 [2024-09-12 16:41:02,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:41:02,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:41:02,243 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 [2024-09-12 16:41:02,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:41:06,436 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((v_func_to_recursive_line_35_to_38_0_~a.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_38_0_~a.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_38_0_~x.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_38_0_~x.base_BEFORE_CALL_1 Int)) (= (select (select |c_#memory_int#1| v_func_to_recursive_line_35_to_38_0_~a.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_38_0_~a.offset_BEFORE_CALL_1) (select (select |c_#memory_int#3| v_func_to_recursive_line_35_to_38_0_~x.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_38_0_~x.offset_BEFORE_CALL_1))) (exists ((v_func_to_recursive_line_35_to_38_0_~u.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_38_0_~u.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_38_0_~b.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_38_0_~y.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_38_0_~b.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_38_0_~y.offset_BEFORE_CALL_1 Int)) (let ((.cse0 (select (select |c_#memory_int#7| v_func_to_recursive_line_35_to_38_0_~b.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_38_0_~b.offset_BEFORE_CALL_1))) (and (= .cse0 (select (select |c_#memory_int#6| v_func_to_recursive_line_35_to_38_0_~u.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_38_0_~u.offset_BEFORE_CALL_1)) (= (select (select |c_#memory_int#4| v_func_to_recursive_line_35_to_38_0_~y.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_38_0_~y.offset_BEFORE_CALL_1) .cse0))))) is different from true [2024-09-12 16:41:07,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:41:07,201 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 69 treesize of output 65 [2024-09-12 16:41:07,220 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 47 treesize of output 39 [2024-09-12 16:41:07,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:41:07,248 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 70 treesize of output 58 [2024-09-12 16:41:07,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:41:07,276 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 57 treesize of output 53 [2024-09-12 16:41:07,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:41:07,292 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 53 treesize of output 49 [2024-09-12 16:41:07,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:41:07,306 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 81 treesize of output 61 [2024-09-12 16:41:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 1 not checked. [2024-09-12 16:41:11,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:41:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 16:41:35,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:41:35,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381402228] [2024-09-12 16:41:35,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:41:35,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208590554] [2024-09-12 16:41:35,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208590554] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:41:35,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:41:35,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2024-09-12 16:41:35,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422582599] [2024-09-12 16:41:35,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:41:35,137 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 16:41:35,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:41:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 16:41:35,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=365, Unknown=3, NotChecked=38, Total=462 [2024-09-12 16:41:35,138 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-12 16:41:48,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 16:42:07,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 18.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-12 16:42:28,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 20.90s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-12 16:42:29,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-12 16:42:36,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:42:40,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 16:42:44,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 16:42:52,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 16:42:56,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 16:43:09,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 12.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-12 16:43:21,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 11.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-12 16:43:28,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 6.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-12 16:43:55,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 26.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-12 16:44:30,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 35.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-12 16:44:32,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-12 16:44:32,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:44:32,626 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2024-09-12 16:44:32,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 16:44:32,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-09-12 16:44:32,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:44:32,631 INFO L225 Difference]: With dead ends: 92 [2024-09-12 16:44:32,631 INFO L226 Difference]: Without dead ends: 90 [2024-09-12 16:44:32,632 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=136, Invalid=855, Unknown=5, NotChecked=60, Total=1056 [2024-09-12 16:44:32,633 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 20 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 165.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:44:32,633 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 504 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 439 Invalid, 12 Unknown, 125 Unchecked, 165.2s Time] [2024-09-12 16:44:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-12 16:44:32,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2024-09-12 16:44:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 56 states have internal predecessors, (57), 20 states have call successors, (20), 12 states have call predecessors, (20), 13 states have return successors, (23), 17 states have call predecessors, (23), 18 states have call successors, (23) [2024-09-12 16:44:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2024-09-12 16:44:32,661 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 46 [2024-09-12 16:44:32,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:44:32,663 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2024-09-12 16:44:32,664 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-12 16:44:32,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:44:32,664 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2024-09-12 16:44:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 16:44:32,665 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:44:32,665 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:44:32,672 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 16:44:32,869 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:44:32,870 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:44:32,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:44:32,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1067334788, now seen corresponding path program 1 times [2024-09-12 16:44:32,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:44:32,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19099264] [2024-09-12 16:44:32,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:44:32,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:44:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:44:32,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552329602] [2024-09-12 16:44:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:44:32,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:44:32,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:44:32,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:44:32,933 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process