./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 --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_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 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 16:51:22,828 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:51:22,904 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:51:22,910 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:51:22,910 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:51:22,946 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:51:22,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:51:22,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:51:22,950 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:51:22,951 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:51:22,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:51:22,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:51:22,952 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:51:22,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:51:22,952 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:51:22,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:51:22,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:51:22,955 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:51:22,955 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:51:22,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:51:22,956 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:51:22,957 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:51:22,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:51:22,957 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:51:22,958 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:51:22,958 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:51:22,958 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:51:22,959 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:51:22,959 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:51:22,959 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:51:22,960 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:51:22,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:51:22,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:51:22,960 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:51:22,961 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:51:22,961 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:51:22,961 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:51:22,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:51:22,962 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:51:22,962 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:51:22,962 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:51:22,963 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:51:22,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:51:23,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:51:23,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:51:23,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:51:23,226 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:51:23,227 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:51:23,228 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-09-18 16:51:24,662 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:51:24,846 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:51:24,847 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-09-18 16:51:24,856 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4ca3de2c5/c8bf11b076f4428e96b19cbcedcf5b07/FLAG071b02341 [2024-09-18 16:51:24,873 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4ca3de2c5/c8bf11b076f4428e96b19cbcedcf5b07 [2024-09-18 16:51:24,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:51:24,877 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:51:24,879 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:51:24,879 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:51:24,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:51:24,884 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:51:24" (1/1) ... [2024-09-18 16:51:24,885 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca7e276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:24, skipping insertion in model container [2024-09-18 16:51:24,885 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:51:24" (1/1) ... [2024-09-18 16:51:24,906 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:51:25,069 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_lcm1.c[1106,1119] [2024-09-18 16:51:25,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:51:25,130 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:51:25,144 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_lcm1.c[1106,1119] [2024-09-18 16:51:25,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:51:25,190 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:51:25,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25 WrapperNode [2024-09-18 16:51:25,192 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:51:25,194 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:51:25,194 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:51:25,194 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:51:25,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (1/1) ... [2024-09-18 16:51:25,211 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (1/1) ... [2024-09-18 16:51:25,221 INFO L138 Inliner]: procedures = 18, calls = 104, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:51:25,221 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:51:25,222 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:51:25,222 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:51:25,222 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:51:25,233 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (1/1) ... [2024-09-18 16:51:25,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (1/1) ... [2024-09-18 16:51:25,237 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (1/1) ... [2024-09-18 16:51:25,277 INFO L175 MemorySlicer]: Split 66 memory accesses to 8 slices as follows [11, 2, 7, 13, 9, 8, 8, 8]. 20 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [0, 2, 7, 0, 0, 0, 0, 0]. The 10 writes are split as follows [2, 0, 0, 2, 1, 1, 2, 2]. [2024-09-18 16:51:25,279 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (1/1) ... [2024-09-18 16:51:25,279 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (1/1) ... [2024-09-18 16:51:25,297 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (1/1) ... [2024-09-18 16:51:25,298 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (1/1) ... [2024-09-18 16:51:25,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (1/1) ... [2024-09-18 16:51:25,302 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (1/1) ... [2024-09-18 16:51:25,305 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:51:25,306 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:51:25,306 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:51:25,306 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:51:25,307 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (1/1) ... [2024-09-18 16:51:25,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:51:25,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:51:25,350 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 16:51:25,353 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 16:51:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:51:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_38_0 [2024-09-18 16:51:25,402 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_38_0 [2024-09-18 16:51:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_48_to_53_0 [2024-09-18 16:51:25,402 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_48_to_53_0 [2024-09-18 16:51:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:51:25,402 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:51:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:51:25,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:51:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:51:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-18 16:51:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-18 16:51:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-18 16:51:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-18 16:51:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-18 16:51:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-18 16:51:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-18 16:51:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_45_0 [2024-09-18 16:51:25,406 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_45_0 [2024-09-18 16:51:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-18 16:51:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-18 16:51:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-18 16:51:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-18 16:51:25,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-18 16:51:25,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-18 16:51:25,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-18 16:51:25,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-18 16:51:25,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-18 16:51:25,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:51:25,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:51:25,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:51:25,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:51:25,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-18 16:51:25,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-18 16:51:25,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-18 16:51:25,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-18 16:51:25,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-18 16:51:25,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-18 16:51:25,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-18 16:51:25,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-18 16:51:25,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:51:25,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:51:25,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-18 16:51:25,561 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:51:25,565 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:51:25,913 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-18 16:51:25,913 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:51:25,941 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:51:25,942 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-18 16:51:25,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:51:25 BoogieIcfgContainer [2024-09-18 16:51:25,942 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:51:25,948 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:51:25,948 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:51:25,953 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:51:25,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:51:24" (1/3) ... [2024-09-18 16:51:25,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fae7c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:51:25, skipping insertion in model container [2024-09-18 16:51:25,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:51:25" (2/3) ... [2024-09-18 16:51:25,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fae7c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:51:25, skipping insertion in model container [2024-09-18 16:51:25,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:51:25" (3/3) ... [2024-09-18 16:51:25,958 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm1.c [2024-09-18 16:51:25,970 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:51:25,970 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:51:26,018 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:51:26,023 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;@50bda64e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:51:26,024 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:51:26,027 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) [2024-09-18 16:51:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 16:51:26,033 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:51:26,034 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] [2024-09-18 16:51:26,034 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:51:26,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:26,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1037831488, now seen corresponding path program 1 times [2024-09-18 16:51:26,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:51:26,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782608168] [2024-09-18 16:51:26,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:51:26,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:51:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:51:26,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:51:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:51:26,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:51:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:51:26,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:51:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:51:26,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 16:51:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:51:26,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:51:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:51:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:51:26,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:51:26,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782608168] [2024-09-18 16:51:26,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782608168] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:51:26,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:51:26,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 16:51:26,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408247317] [2024-09-18 16:51:26,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:51:26,314 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 16:51:26,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:51:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 16:51:26,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:51:26,340 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) [2024-09-18 16:51:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:51:26,373 INFO L93 Difference]: Finished difference Result 110 states and 158 transitions. [2024-09-18 16:51:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 16:51:26,390 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 [2024-09-18 16:51:26,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:51:26,397 INFO L225 Difference]: With dead ends: 110 [2024-09-18 16:51:26,397 INFO L226 Difference]: Without dead ends: 54 [2024-09-18 16:51:26,401 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 [2024-09-18 16:51:26,404 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 [2024-09-18 16:51:26,405 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] [2024-09-18 16:51:26,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-18 16:51:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-18 16:51:26,466 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) [2024-09-18 16:51:26,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-18 16:51:26,472 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 36 [2024-09-18 16:51:26,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:51:26,473 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-18 16:51:26,473 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) [2024-09-18 16:51:26,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:26,476 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-18 16:51:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 16:51:26,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:51:26,479 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] [2024-09-18 16:51:26,479 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:51:26,480 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:51:26,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:26,480 INFO L85 PathProgramCache]: Analyzing trace with hash -268686776, now seen corresponding path program 1 times [2024-09-18 16:51:26,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:51:26,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288082486] [2024-09-18 16:51:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:51:26,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:51:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:51:26,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043180465] [2024-09-18 16:51:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:51:26,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:51:26,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:51:26,615 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 16:51:26,616 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 16:51:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:51:26,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-18 16:51:26,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:51:26,990 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 16:51:26,992 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 16:51:27,010 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 16:51:27,018 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 16:51:27,028 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 16:51:27,152 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 [2024-09-18 16:51:27,157 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 [2024-09-18 16:51:27,164 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 [2024-09-18 16:51:27,171 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 [2024-09-18 16:51:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:51:27,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:51:27,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:51:27,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288082486] [2024-09-18 16:51:27,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:51:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043180465] [2024-09-18 16:51:27,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043180465] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:51:27,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:51:27,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-18 16:51:27,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774091680] [2024-09-18 16:51:27,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:51:27,232 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:51:27,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:51:27,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:51:27,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:51:27,235 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) [2024-09-18 16:51:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:51:27,509 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-09-18 16:51:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 16:51:27,510 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 [2024-09-18 16:51:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:51:27,513 INFO L225 Difference]: With dead ends: 69 [2024-09-18 16:51:27,513 INFO L226 Difference]: Without dead ends: 67 [2024-09-18 16:51:27,514 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 [2024-09-18 16:51:27,515 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 [2024-09-18 16:51:27,515 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] [2024-09-18 16:51:27,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-18 16:51:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-18 16:51:27,535 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) [2024-09-18 16:51:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-09-18 16:51:27,537 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 36 [2024-09-18 16:51:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:51:27,538 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-09-18 16:51:27,538 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) [2024-09-18 16:51:27,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-09-18 16:51:27,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 16:51:27,543 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:51:27,543 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] [2024-09-18 16:51:27,551 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 16:51:27,744 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 [2024-09-18 16:51:27,744 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:51:27,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:27,745 INFO L85 PathProgramCache]: Analyzing trace with hash -670583387, now seen corresponding path program 1 times [2024-09-18 16:51:27,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:51:27,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141419538] [2024-09-18 16:51:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:51:27,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:51:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:51:27,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111584951] [2024-09-18 16:51:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:51:27,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:51:27,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:51:27,933 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 16:51:27,935 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 16:51:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:51:28,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-09-18 16:51:28,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:51:28,247 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 16:51:28,249 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 16:51:28,265 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 16:51:28,270 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 16:51:28,283 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 16:51:28,583 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 [2024-09-18 16:51:28,587 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 [2024-09-18 16:51:28,595 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 [2024-09-18 16:51:28,599 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 [2024-09-18 16:51:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:51:28,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:51:31,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:51:31,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141419538] [2024-09-18 16:51:31,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:51:31,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111584951] [2024-09-18 16:51:31,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111584951] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:51:31,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:51:31,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-18 16:51:31,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105826237] [2024-09-18 16:51:31,312 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:51:31,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 16:51:31,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:51:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 16:51:31,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-18 16:51:31,314 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-18 16:51:32,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:51:32,235 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2024-09-18 16:51:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 16:51:32,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-09-18 16:51:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:51:32,239 INFO L225 Difference]: With dead ends: 115 [2024-09-18 16:51:32,241 INFO L226 Difference]: Without dead ends: 113 [2024-09-18 16:51:32,241 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-18 16:51:32,242 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 58 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 16:51:32,244 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 400 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 16:51:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-18 16:51:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2024-09-18 16:51:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 72 states have internal predecessors, (76), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2024-09-18 16:51:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2024-09-18 16:51:32,292 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 46 [2024-09-18 16:51:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:51:32,292 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2024-09-18 16:51:32,292 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-18 16:51:32,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:32,293 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2024-09-18 16:51:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 16:51:32,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:51:32,298 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] [2024-09-18 16:51:32,307 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 16:51:32,499 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 [2024-09-18 16:51:32,499 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:51:32,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1067334788, now seen corresponding path program 1 times [2024-09-18 16:51:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:51:32,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899121718] [2024-09-18 16:51:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:51:32,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:51:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:51:32,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882624896] [2024-09-18 16:51:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:51:32,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:51:32,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:51:32,588 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 16:51:32,591 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process