./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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 11:38:08,319 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:38:08,410 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 11:38:08,416 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:38:08,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:38:08,450 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:38:08,451 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:38:08,452 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:38:08,452 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:38:08,454 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:38:08,455 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:38:08,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:38:08,455 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:38:08,456 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:38:08,456 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:38:08,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:38:08,457 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:38:08,457 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:38:08,457 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 11:38:08,457 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:38:08,458 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:38:08,461 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:38:08,462 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:38:08,462 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:38:08,462 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:38:08,462 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:38:08,462 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:38:08,462 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:38:08,463 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:38:08,463 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:38:08,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:38:08,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:38:08,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:38:08,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:38:08,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:38:08,464 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:38:08,464 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 11:38:08,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 11:38:08,465 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:38:08,465 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:38:08,468 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:38:08,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:38:08,469 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true 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 [2024-09-25 11:38:08,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:38:08,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:38:08,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:38:08,831 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:38:08,831 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:38:08,833 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-09-25 11:38:10,498 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:38:10,683 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:38:10,684 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-09-25 11:38:10,691 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ea2766e15/a99745d2f3e74d3a93d940a86067e1e4/FLAGd094fe182 [2024-09-25 11:38:10,703 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ea2766e15/a99745d2f3e74d3a93d940a86067e1e4 [2024-09-25 11:38:10,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:38:10,706 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:38:10,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:38:10,708 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:38:10,713 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:38:10,713 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:10,714 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61954d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10, skipping insertion in model container [2024-09-25 11:38:10,714 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:10,735 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:38:10,871 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] [2024-09-25 11:38:10,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:38:10,918 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:38:10,934 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] [2024-09-25 11:38:10,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:38:10,983 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:38:10,983 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10 WrapperNode [2024-09-25 11:38:10,984 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:38:10,985 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:38:10,986 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:38:10,986 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:38:10,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:11,003 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:11,013 INFO L138 Inliner]: procedures = 18, calls = 104, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:38:11,013 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:38:11,014 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:38:11,014 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:38:11,014 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:38:11,024 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:11,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:11,034 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:11,068 INFO L175 MemorySlicer]: Split 66 memory accesses to 8 slices as follows [2, 13, 7, 11, 9, 8, 8, 8]. 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, 2, 0, 2, 1, 1, 2, 2]. [2024-09-25 11:38:11,069 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:11,069 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:11,080 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:11,088 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:11,094 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:11,096 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:11,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:38:11,104 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:38:11,105 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:38:11,105 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:38:11,106 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (1/1) ... [2024-09-25 11:38:11,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:38:11,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:11,142 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) [2024-09-25 11:38:11,146 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 [2024-09-25 11:38:11,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:38:11,194 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_38_0 [2024-09-25 11:38:11,194 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_38_0 [2024-09-25 11:38:11,194 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_48_to_53_0 [2024-09-25 11:38:11,194 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_48_to_53_0 [2024-09-25 11:38:11,194 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 11:38:11,194 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 11:38:11,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:38:11,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:38:11,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 11:38:11,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 11:38:11,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 11:38:11,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 11:38:11,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 11:38:11,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-25 11:38:11,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-25 11:38:11,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-25 11:38:11,196 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_45_0 [2024-09-25 11:38:11,196 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_45_0 [2024-09-25 11:38:11,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 11:38:11,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 11:38:11,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 11:38:11,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 11:38:11,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 11:38:11,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 11:38:11,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-25 11:38:11,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-25 11:38:11,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-25 11:38:11,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:38:11,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:38:11,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:38:11,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:38:11,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 11:38:11,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 11:38:11,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 11:38:11,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 11:38:11,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 11:38:11,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-25 11:38:11,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-25 11:38:11,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-25 11:38:11,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 11:38:11,199 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 11:38:11,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 11:38:11,358 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:38:11,360 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:38:11,728 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-25 11:38:11,730 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:38:11,760 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:38:11,760 INFO L317 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-25 11:38:11,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:38:11 BoogieIcfgContainer [2024-09-25 11:38:11,761 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:38:11,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:38:11,765 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:38:11,768 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:38:11,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:38:10" (1/3) ... [2024-09-25 11:38:11,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33969bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:38:11, skipping insertion in model container [2024-09-25 11:38:11,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:10" (2/3) ... [2024-09-25 11:38:11,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33969bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:38:11, skipping insertion in model container [2024-09-25 11:38:11,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:38:11" (3/3) ... [2024-09-25 11:38:11,772 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm1.c [2024-09-25 11:38:11,788 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:38:11,788 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 11:38:11,848 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:38:11,855 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;@3593d5e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:38:11,856 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 11:38:11,861 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) [2024-09-25 11:38:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-25 11:38:11,873 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:11,874 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] [2024-09-25 11:38:11,874 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:11,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1037831488, now seen corresponding path program 1 times [2024-09-25 11:38:11,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:11,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960324595] [2024-09-25 11:38:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:11,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:12,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:38:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:12,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:38:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:12,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:38:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:12,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 11:38:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:12,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:38:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 11:38:12,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:12,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960324595] [2024-09-25 11:38:12,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960324595] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:38:12,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:38:12,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 11:38:12,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640284364] [2024-09-25 11:38:12,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:38:12,218 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 11:38:12,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:12,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 11:38:12,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 11:38:12,247 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) [2024-09-25 11:38:12,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:12,282 INFO L93 Difference]: Finished difference Result 110 states and 158 transitions. [2024-09-25 11:38:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 11:38:12,285 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 [2024-09-25 11:38:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:12,293 INFO L225 Difference]: With dead ends: 110 [2024-09-25 11:38:12,293 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 11:38:12,299 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 [2024-09-25 11:38:12,305 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 [2024-09-25 11:38:12,307 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] [2024-09-25 11:38:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 11:38:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-25 11:38:12,341 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) [2024-09-25 11:38:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-25 11:38:12,345 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 36 [2024-09-25 11:38:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:12,346 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-25 11:38:12,346 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) [2024-09-25 11:38:12,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-25 11:38:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-25 11:38:12,351 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:12,351 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] [2024-09-25 11:38:12,351 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 11:38:12,352 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:12,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash -268686776, now seen corresponding path program 1 times [2024-09-25 11:38:12,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:12,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756500633] [2024-09-25 11:38:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:12,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:12,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477803204] [2024-09-25 11:38:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:12,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:12,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:12,485 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) [2024-09-25 11:38:12,488 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 11:38:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:12,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-25 11:38:12,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:12,824 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 [2024-09-25 11:38:12,830 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 [2024-09-25 11:38:12,852 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 [2024-09-25 11:38:12,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 11:38:12,875 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 [2024-09-25 11:38:13,010 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 [2024-09-25 11:38:13,015 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 [2024-09-25 11:38:13,025 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 [2024-09-25 11:38:13,036 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 [2024-09-25 11:38:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 11:38:13,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:38:13,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:13,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756500633] [2024-09-25 11:38:13,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:38:13,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477803204] [2024-09-25 11:38:13,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477803204] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:38:13,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:38:13,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 11:38:13,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77563375] [2024-09-25 11:38:13,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:38:13,093 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 11:38:13,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 11:38:13,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 11:38:13,095 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) [2024-09-25 11:38:13,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:13,394 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-09-25 11:38:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 11:38:13,398 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 [2024-09-25 11:38:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:13,402 INFO L225 Difference]: With dead ends: 69 [2024-09-25 11:38:13,404 INFO L226 Difference]: Without dead ends: 67 [2024-09-25 11:38:13,405 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 [2024-09-25 11:38:13,406 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 [2024-09-25 11:38:13,407 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] [2024-09-25 11:38:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-25 11:38:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-25 11:38:13,430 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) [2024-09-25 11:38:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-09-25 11:38:13,435 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 36 [2024-09-25 11:38:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:13,436 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-09-25 11:38:13,436 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) [2024-09-25 11:38:13,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-09-25 11:38:13,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 11:38:13,439 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:13,439 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] [2024-09-25 11:38:13,448 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 11:38:13,642 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 [2024-09-25 11:38:13,642 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:13,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:13,644 INFO L85 PathProgramCache]: Analyzing trace with hash -670583387, now seen corresponding path program 1 times [2024-09-25 11:38:13,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:13,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608207250] [2024-09-25 11:38:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:13,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:13,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037053558] [2024-09-25 11:38:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:13,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:13,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:13,777 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) [2024-09-25 11:38:13,781 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 11:38:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:14,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-09-25 11:38:14,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:14,064 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 [2024-09-25 11:38:14,067 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 [2024-09-25 11:38:14,087 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 [2024-09-25 11:38:14,097 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 [2024-09-25 11:38:14,112 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 [2024-09-25 11:38:14,470 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 [2024-09-25 11:38:14,478 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 [2024-09-25 11:38:14,491 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 [2024-09-25 11:38:14,497 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 [2024-09-25 11:38:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 11:38:14,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:38:15,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:38:15,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608207250] [2024-09-25 11:38:15,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:38:15,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037053558] [2024-09-25 11:38:15,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037053558] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:38:15,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:38:15,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-25 11:38:15,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005920815] [2024-09-25 11:38:15,834 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:38:15,834 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 11:38:15,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:38:15,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 11:38:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-25 11:38:15,838 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) [2024-09-25 11:38:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:16,565 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2024-09-25 11:38:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 11:38:16,566 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 [2024-09-25 11:38:16,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:16,569 INFO L225 Difference]: With dead ends: 115 [2024-09-25 11:38:16,569 INFO L226 Difference]: Without dead ends: 113 [2024-09-25 11:38:16,571 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-25 11:38:16,573 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 [2024-09-25 11:38:16,573 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] [2024-09-25 11:38:16,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-25 11:38:16,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2024-09-25 11:38:16,604 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) [2024-09-25 11:38:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2024-09-25 11:38:16,607 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 46 [2024-09-25 11:38:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:16,607 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2024-09-25 11:38:16,608 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) [2024-09-25 11:38:16,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2024-09-25 11:38:16,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 11:38:16,612 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:16,612 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] [2024-09-25 11:38:16,621 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 11:38:16,816 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 [2024-09-25 11:38:16,817 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:16,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:16,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1067334788, now seen corresponding path program 1 times [2024-09-25 11:38:16,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:38:16,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692072897] [2024-09-25 11:38:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:16,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:38:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:38:16,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761316373] [2024-09-25 11:38:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:16,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:38:16,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:16,923 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) [2024-09-25 11:38:16,928 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process