./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 e378df2c 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 --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 15:22:08,501 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 15:22:08,578 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 15:22:08,582 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 15:22:08,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 15:22:08,618 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 15:22:08,618 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 15:22:08,619 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 15:22:08,620 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 15:22:08,621 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 15:22:08,621 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 15:22:08,622 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 15:22:08,622 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 15:22:08,623 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 15:22:08,623 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 15:22:08,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 15:22:08,623 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 15:22:08,624 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 15:22:08,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 15:22:08,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 15:22:08,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 15:22:08,625 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 15:22:08,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 15:22:08,626 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 15:22:08,626 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 15:22:08,626 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 15:22:08,627 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 15:22:08,627 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 15:22:08,627 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 15:22:08,627 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 15:22:08,628 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 15:22:08,628 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 15:22:08,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:22:08,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 15:22:08,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 15:22:08,629 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 15:22:08,629 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 15:22:08,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 15:22:08,630 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 15:22:08,630 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 15:22:08,630 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 15:22:08,631 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 15:22:08,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 15:22:08,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 15:22:08,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 15:22:08,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 15:22:08,943 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 15:22:08,944 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 15:22:08,945 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-10-15 15:22:10,389 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 15:22:10,580 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 15:22:10,584 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-10-15 15:22:10,597 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6b6c9fba5/2296efd7d3594d4fa0baeb70fccd403c/FLAG6ef83c4e9 [2024-10-15 15:22:10,615 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6b6c9fba5/2296efd7d3594d4fa0baeb70fccd403c [2024-10-15 15:22:10,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 15:22:10,619 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 15:22:10,621 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 15:22:10,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 15:22:10,627 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 15:22:10,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:10,630 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b6add9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10, skipping insertion in model container [2024-10-15 15:22:10,631 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:10,658 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 15:22:10,838 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] [2024-10-15 15:22:10,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:22:10,869 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 15:22:10,881 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] [2024-10-15 15:22:10,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:22:10,916 INFO L204 MainTranslator]: Completed translation [2024-10-15 15:22:10,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10 WrapperNode [2024-10-15 15:22:10,917 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 15:22:10,918 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 15:22:10,918 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 15:22:10,918 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 15:22:10,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:10,933 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:10,940 INFO L138 Inliner]: procedures = 18, calls = 104, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 15:22:10,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 15:22:10,941 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 15:22:10,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 15:22:10,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 15:22:10,956 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:10,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:10,960 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:10,986 INFO L175 MemorySlicer]: Split 66 memory accesses to 8 slices as follows [2, 7, 8, 9, 8, 8, 13, 11]. 20 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 0, 1, 1, 2, 2, 2, 2]. [2024-10-15 15:22:10,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:10,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:11,003 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:11,005 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:11,006 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:11,008 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:11,016 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 15:22:11,017 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 15:22:11,017 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 15:22:11,017 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 15:22:11,018 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (1/1) ... [2024-10-15 15:22:11,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:22:11,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:11,052 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) [2024-10-15 15:22:11,057 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 [2024-10-15 15:22:11,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 15:22:11,103 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_38_0 [2024-10-15 15:22:11,103 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_38_0 [2024-10-15 15:22:11,103 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_48_to_53_0 [2024-10-15 15:22:11,104 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_48_to_53_0 [2024-10-15 15:22:11,104 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 15:22:11,104 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 15:22:11,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 15:22:11,105 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 15:22:11,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 15:22:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-15 15:22:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-15 15:22:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-15 15:22:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-15 15:22:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-15 15:22:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-15 15:22:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-15 15:22:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_45_0 [2024-10-15 15:22:11,106 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_45_0 [2024-10-15 15:22:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-15 15:22:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-15 15:22:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-15 15:22:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-15 15:22:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-15 15:22:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-15 15:22:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-15 15:22:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-15 15:22:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-15 15:22:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 15:22:11,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 15:22:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 15:22:11,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 15:22:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-15 15:22:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-15 15:22:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-15 15:22:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-15 15:22:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-15 15:22:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-15 15:22:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-15 15:22:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-15 15:22:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 15:22:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 15:22:11,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-15 15:22:11,259 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 15:22:11,263 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 15:22:11,560 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-10-15 15:22:11,560 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 15:22:11,593 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 15:22:11,593 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-15 15:22:11,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:22:11 BoogieIcfgContainer [2024-10-15 15:22:11,594 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 15:22:11,599 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 15:22:11,599 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 15:22:11,603 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 15:22:11,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:22:10" (1/3) ... [2024-10-15 15:22:11,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a11791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:22:11, skipping insertion in model container [2024-10-15 15:22:11,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:22:10" (2/3) ... [2024-10-15 15:22:11,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a11791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:22:11, skipping insertion in model container [2024-10-15 15:22:11,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:22:11" (3/3) ... [2024-10-15 15:22:11,607 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm1.c [2024-10-15 15:22:11,623 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 15:22:11,624 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 15:22:11,687 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 15:22:11,695 INFO L333 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;@36632c1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 15:22:11,695 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 15:22:11,699 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) [2024-10-15 15:22:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 15:22:11,708 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:11,708 INFO L215 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] [2024-10-15 15:22:11,709 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:11,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:11,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1037831488, now seen corresponding path program 1 times [2024-10-15 15:22:11,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:11,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361785596] [2024-10-15 15:22:11,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:11,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:11,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:22:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:11,955 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:22:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:11,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:22:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:11,976 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 15:22:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:11,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 15:22:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 15:22:11,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:11,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361785596] [2024-10-15 15:22:11,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361785596] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:22:11,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:22:11,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-15 15:22:11,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835524617] [2024-10-15 15:22:11,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:22:12,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-15 15:22:12,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:12,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-15 15:22:12,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 15:22:12,023 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) [2024-10-15 15:22:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:12,062 INFO L93 Difference]: Finished difference Result 110 states and 158 transitions. [2024-10-15 15:22:12,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-15 15:22:12,065 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 [2024-10-15 15:22:12,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:12,071 INFO L225 Difference]: With dead ends: 110 [2024-10-15 15:22:12,071 INFO L226 Difference]: Without dead ends: 54 [2024-10-15 15:22:12,075 INFO L431 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 [2024-10-15 15:22:12,079 INFO L432 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 [2024-10-15 15:22:12,081 INFO L433 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] [2024-10-15 15:22:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-15 15:22:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-15 15:22:12,122 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) [2024-10-15 15:22:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-10-15 15:22:12,128 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 36 [2024-10-15 15:22:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:12,130 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-10-15 15:22:12,130 INFO L472 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) [2024-10-15 15:22:12,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:12,132 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-10-15 15:22:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 15:22:12,134 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:12,134 INFO L215 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] [2024-10-15 15:22:12,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 15:22:12,135 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:12,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:12,137 INFO L85 PathProgramCache]: Analyzing trace with hash -268686776, now seen corresponding path program 1 times [2024-10-15 15:22:12,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:12,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886314052] [2024-10-15 15:22:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:12,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:12,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724566669] [2024-10-15 15:22:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:12,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:12,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:12,338 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) [2024-10-15 15:22:12,340 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 15:22:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:12,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-15 15:22:12,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:12,718 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 [2024-10-15 15:22:12,721 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 [2024-10-15 15:22:12,746 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 [2024-10-15 15:22:12,761 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 [2024-10-15 15:22:12,774 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 [2024-10-15 15:22:12,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:22:12,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-15 15:22:12,952 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 [2024-10-15 15:22:12,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-15 15:22:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 15:22:13,032 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:22:13,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:13,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886314052] [2024-10-15 15:22:13,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:13,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724566669] [2024-10-15 15:22:13,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724566669] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:22:13,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:22:13,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:22:13,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765340930] [2024-10-15 15:22:13,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:22:13,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:22:13,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:22:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:22:13,038 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) [2024-10-15 15:22:13,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:13,318 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-10-15 15:22:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:22:13,318 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 [2024-10-15 15:22:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:13,321 INFO L225 Difference]: With dead ends: 69 [2024-10-15 15:22:13,321 INFO L226 Difference]: Without dead ends: 67 [2024-10-15 15:22:13,322 INFO L431 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 [2024-10-15 15:22:13,323 INFO L432 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 [2024-10-15 15:22:13,323 INFO L433 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] [2024-10-15 15:22:13,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-15 15:22:13,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-10-15 15:22:13,346 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) [2024-10-15 15:22:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-10-15 15:22:13,350 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 36 [2024-10-15 15:22:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:13,350 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-10-15 15:22:13,351 INFO L472 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) [2024-10-15 15:22:13,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-10-15 15:22:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 15:22:13,352 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:13,353 INFO L215 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] [2024-10-15 15:22:13,361 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 15:22:13,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:13,557 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:13,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:13,557 INFO L85 PathProgramCache]: Analyzing trace with hash -670583387, now seen corresponding path program 1 times [2024-10-15 15:22:13,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:13,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154047554] [2024-10-15 15:22:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:13,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:13,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256376808] [2024-10-15 15:22:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:13,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:13,651 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) [2024-10-15 15:22:13,655 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 15:22:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:13,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 153 conjuncts are in the unsatisfiable core [2024-10-15 15:22:13,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:13,937 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 [2024-10-15 15:22:13,940 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 [2024-10-15 15:22:13,962 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 [2024-10-15 15:22:13,968 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 [2024-10-15 15:22:13,975 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 [2024-10-15 15:22:14,380 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 [2024-10-15 15:22:14,384 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 [2024-10-15 15:22:14,394 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 [2024-10-15 15:22:14,398 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 [2024-10-15 15:22:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 15:22:14,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:21,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154047554] [2024-10-15 15:22:21,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256376808] [2024-10-15 15:22:21,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256376808] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:21,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:21,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-10-15 15:22:21,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935653926] [2024-10-15 15:22:21,764 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:21,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 15:22:21,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:21,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 15:22:21,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=173, Unknown=1, NotChecked=0, Total=210 [2024-10-15 15:22:21,766 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) [2024-10-15 15:22:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:22,524 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2024-10-15 15:22:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 15:22:22,524 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 [2024-10-15 15:22:22,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:22,527 INFO L225 Difference]: With dead ends: 115 [2024-10-15 15:22:22,527 INFO L226 Difference]: Without dead ends: 113 [2024-10-15 15:22:22,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=69, Invalid=310, Unknown=1, NotChecked=0, Total=380 [2024-10-15 15:22:22,528 INFO L432 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 [2024-10-15 15:22:22,529 INFO L433 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] [2024-10-15 15:22:22,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-15 15:22:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2024-10-15 15:22:22,552 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) [2024-10-15 15:22:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2024-10-15 15:22:22,554 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 46 [2024-10-15 15:22:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:22,555 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2024-10-15 15:22:22,555 INFO L472 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) [2024-10-15 15:22:22,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2024-10-15 15:22:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 15:22:22,556 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:22,556 INFO L215 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] [2024-10-15 15:22:22,569 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-15 15:22:22,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:22,757 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:22,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:22,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1067334788, now seen corresponding path program 1 times [2024-10-15 15:22:22,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:22,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509088864] [2024-10-15 15:22:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:22,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:22,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416249446] [2024-10-15 15:22:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:22,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:22,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:22,836 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) [2024-10-15 15:22:22,837 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process