./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.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 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.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 d93bd48e791c000b7768d0e055259ea6d087a487fbdd17b18765993d4c240b84 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 20:03:11,141 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 20:03:11,208 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 20:03:11,212 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 20:03:11,213 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 20:03:11,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 20:03:11,244 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 20:03:11,244 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 20:03:11,245 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 20:03:11,246 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 20:03:11,247 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 20:03:11,247 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 20:03:11,247 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 20:03:11,250 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 20:03:11,251 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 20:03:11,251 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 20:03:11,251 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 20:03:11,252 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 20:03:11,252 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 20:03:11,252 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 20:03:11,252 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 20:03:11,255 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 20:03:11,256 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 20:03:11,256 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 20:03:11,256 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 20:03:11,256 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 20:03:11,256 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 20:03:11,257 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 20:03:11,257 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 20:03:11,257 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 20:03:11,257 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 20:03:11,257 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 20:03:11,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 20:03:11,258 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 20:03:11,258 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 20:03:11,258 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 20:03:11,258 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 20:03:11,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 20:03:11,259 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 20:03:11,259 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 20:03:11,259 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 20:03:11,260 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 20:03:11,261 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d93bd48e791c000b7768d0e055259ea6d087a487fbdd17b18765993d4c240b84 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2024-09-12 20:03:11,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 20:03:11,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 20:03:11,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 20:03:11,584 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 20:03:11,584 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 20:03:11,585 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c [2024-09-12 20:03:13,227 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 20:03:13,419 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 20:03:13,420 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c [2024-09-12 20:03:13,430 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/949026785/6dfcc38018f94982b5b2d28a3712786e/FLAG6a9916667 [2024-09-12 20:03:13,800 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/949026785/6dfcc38018f94982b5b2d28a3712786e [2024-09-12 20:03:13,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 20:03:13,804 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 20:03:13,805 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 20:03:13,806 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 20:03:13,811 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 20:03:13,813 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 08:03:13" (1/1) ... [2024-09-12 20:03:13,814 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261dfb5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:13, skipping insertion in model container [2024-09-12 20:03:13,814 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 08:03:13" (1/1) ... [2024-09-12 20:03:13,832 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 20:03:13,980 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c[1061,1074] [2024-09-12 20:03:13,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 20:03:14,005 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 20:03:14,014 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c[1061,1074] [2024-09-12 20:03:14,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 20:03:14,038 INFO L204 MainTranslator]: Completed translation [2024-09-12 20:03:14,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14 WrapperNode [2024-09-12 20:03:14,038 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 20:03:14,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 20:03:14,039 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 20:03:14,040 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 20:03:14,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (1/1) ... [2024-09-12 20:03:14,052 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (1/1) ... [2024-09-12 20:03:14,059 INFO L138 Inliner]: procedures = 16, calls = 82, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 20:03:14,059 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 20:03:14,060 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 20:03:14,061 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 20:03:14,061 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 20:03:14,070 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (1/1) ... [2024-09-12 20:03:14,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (1/1) ... [2024-09-12 20:03:14,073 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (1/1) ... [2024-09-12 20:03:14,091 INFO L175 MemorySlicer]: Split 51 memory accesses to 8 slices as follows [2, 7, 8, 8, 6, 6, 7, 7]. 16 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, 2, 2, 2, 2, 1, 1]. [2024-09-12 20:03:14,091 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (1/1) ... [2024-09-12 20:03:14,092 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (1/1) ... [2024-09-12 20:03:14,099 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (1/1) ... [2024-09-12 20:03:14,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (1/1) ... [2024-09-12 20:03:14,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (1/1) ... [2024-09-12 20:03:14,103 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (1/1) ... [2024-09-12 20:03:14,106 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 20:03:14,106 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 20:03:14,107 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 20:03:14,107 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 20:03:14,107 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (1/1) ... [2024-09-12 20:03:14,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 20:03:14,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 20:03:14,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 20:03:14,142 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 20:03:14,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 20:03:14,186 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 20:03:14,187 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 20:03:14,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 20:03:14,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 20:03:14,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 20:03:14,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 20:03:14,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-12 20:03:14,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-12 20:03:14,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-12 20:03:14,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-12 20:03:14,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-12 20:03:14,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-12 20:03:14,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-12 20:03:14,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-12 20:03:14,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-12 20:03:14,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-12 20:03:14,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-12 20:03:14,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-12 20:03:14,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-12 20:03:14,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-12 20:03:14,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-12 20:03:14,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 20:03:14,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 20:03:14,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 20:03:14,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 20:03:14,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-12 20:03:14,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-12 20:03:14,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-12 20:03:14,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-12 20:03:14,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-12 20:03:14,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-12 20:03:14,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-12 20:03:14,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-12 20:03:14,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 20:03:14,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 20:03:14,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-12 20:03:14,195 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_46_0 [2024-09-12 20:03:14,195 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_46_0 [2024-09-12 20:03:14,292 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 20:03:14,294 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 20:03:14,553 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-12 20:03:14,555 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 20:03:14,585 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 20:03:14,586 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 20:03:14,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 08:03:14 BoogieIcfgContainer [2024-09-12 20:03:14,586 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 20:03:14,590 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 20:03:14,590 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 20:03:14,593 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 20:03:14,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 08:03:13" (1/3) ... [2024-09-12 20:03:14,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab31cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 08:03:14, skipping insertion in model container [2024-09-12 20:03:14,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:14" (2/3) ... [2024-09-12 20:03:14,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab31cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 08:03:14, skipping insertion in model container [2024-09-12 20:03:14,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 08:03:14" (3/3) ... [2024-09-12 20:03:14,597 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm2.c [2024-09-12 20:03:14,614 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 20:03:14,614 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 20:03:14,686 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 20:03:14,694 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;@4aeed713, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 20:03:14,694 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 20:03:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 20:03:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 20:03:14,707 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 20:03:14,707 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 20:03:14,708 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 20:03:14,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:14,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1231096965, now seen corresponding path program 1 times [2024-09-12 20:03:14,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 20:03:14,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12630884] [2024-09-12 20:03:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:14,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 20:03:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:14,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 20:03:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:15,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 20:03:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:15,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 20:03:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:15,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 20:03:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:15,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 20:03:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 20:03:15,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 20:03:15,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12630884] [2024-09-12 20:03:15,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12630884] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 20:03:15,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 20:03:15,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 20:03:15,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571457627] [2024-09-12 20:03:15,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 20:03:15,050 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 20:03:15,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 20:03:15,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 20:03:15,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 20:03:15,072 INFO L87 Difference]: Start difference. First operand has 39 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 20:03:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 20:03:15,103 INFO L93 Difference]: Finished difference Result 72 states and 97 transitions. [2024-09-12 20:03:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 20:03:15,105 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-12 20:03:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 20:03:15,112 INFO L225 Difference]: With dead ends: 72 [2024-09-12 20:03:15,112 INFO L226 Difference]: Without dead ends: 35 [2024-09-12 20:03:15,116 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 20:03:15,119 INFO L434 NwaCegarLoop]: 43 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, 43 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 20:03:15,120 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 20:03:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-12 20:03:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-12 20:03:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 20:03:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-09-12 20:03:15,160 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 36 [2024-09-12 20:03:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 20:03:15,161 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-09-12 20:03:15,162 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 20:03:15,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-09-12 20:03:15,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 20:03:15,165 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 20:03:15,165 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 20:03:15,165 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 20:03:15,165 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 20:03:15,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:15,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1757352067, now seen corresponding path program 1 times [2024-09-12 20:03:15,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 20:03:15,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669773699] [2024-09-12 20:03:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:15,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 20:03:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 20:03:15,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580008945] [2024-09-12 20:03:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:15,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:03:15,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 20:03:15,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 20:03:15,300 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 20:03:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:15,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-12 20:03:15,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 20:03:15,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 20:03:15,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 20:03:15,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:15,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:15,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:15,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:15,961 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 30 treesize of output 18 [2024-09-12 20:03:15,967 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 26 treesize of output 14 [2024-09-12 20:03:15,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-12 20:03:15,986 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 30 treesize of output 18 [2024-09-12 20:03:15,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-12 20:03:15,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-12 20:03:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 20:03:16,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 20:03:16,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 20:03:16,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669773699] [2024-09-12 20:03:16,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 20:03:16,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580008945] [2024-09-12 20:03:16,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580008945] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 20:03:16,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 20:03:16,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 20:03:16,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994287086] [2024-09-12 20:03:16,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 20:03:16,054 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 20:03:16,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 20:03:16,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 20:03:16,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-12 20:03:16,056 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-12 20:03:16,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 20:03:16,335 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-09-12 20:03:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 20:03:16,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-12 20:03:16,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 20:03:16,338 INFO L225 Difference]: With dead ends: 50 [2024-09-12 20:03:16,338 INFO L226 Difference]: Without dead ends: 48 [2024-09-12 20:03:16,338 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-12 20:03:16,341 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 20:03:16,343 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 182 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 20:03:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-12 20:03:16,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2024-09-12 20:03:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-12 20:03:16,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2024-09-12 20:03:16,367 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 36 [2024-09-12 20:03:16,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 20:03:16,368 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2024-09-12 20:03:16,368 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-12 20:03:16,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2024-09-12 20:03:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 20:03:16,371 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 20:03:16,371 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 20:03:16,380 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 20:03:16,571 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:03:16,572 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 20:03:16,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:16,573 INFO L85 PathProgramCache]: Analyzing trace with hash -641452916, now seen corresponding path program 1 times [2024-09-12 20:03:16,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 20:03:16,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891056714] [2024-09-12 20:03:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:16,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 20:03:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 20:03:16,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826359364] [2024-09-12 20:03:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:16,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:03:16,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 20:03:16,670 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 20:03:16,671 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 20:03:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:17,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-12 20:03:17,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 20:03:17,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 20:03:17,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 20:03:17,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:17,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:17,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:17,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:17,139 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 11 treesize of output 7 [2024-09-12 20:03:17,145 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 11 treesize of output 7 [2024-09-12 20:03:17,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 20:03:17,162 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 11 treesize of output 7 [2024-09-12 20:03:17,346 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 30 treesize of output 18 [2024-09-12 20:03:17,361 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 26 treesize of output 14 [2024-09-12 20:03:17,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-12 20:03:17,383 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 30 treesize of output 18 [2024-09-12 20:03:17,391 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 26 treesize of output 14 [2024-09-12 20:03:17,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-12 20:03:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 20:03:17,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 20:03:17,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 20:03:17,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891056714] [2024-09-12 20:03:17,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 20:03:17,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826359364] [2024-09-12 20:03:17,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826359364] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 20:03:17,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 20:03:17,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 20:03:17,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019909160] [2024-09-12 20:03:17,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 20:03:17,461 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 20:03:17,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 20:03:17,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 20:03:17,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-12 20:03:17,463 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-12 20:03:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 20:03:17,721 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2024-09-12 20:03:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 20:03:17,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-09-12 20:03:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 20:03:17,724 INFO L225 Difference]: With dead ends: 56 [2024-09-12 20:03:17,724 INFO L226 Difference]: Without dead ends: 46 [2024-09-12 20:03:17,724 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-12 20:03:17,725 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 20:03:17,725 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 80 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 20:03:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-12 20:03:17,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-09-12 20:03:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-12 20:03:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2024-09-12 20:03:17,737 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 46 [2024-09-12 20:03:17,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 20:03:17,738 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2024-09-12 20:03:17,738 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-12 20:03:17,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2024-09-12 20:03:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 20:03:17,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 20:03:17,740 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 20:03:17,748 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 20:03:17,940 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:03:17,941 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 20:03:17,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:17,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1100455939, now seen corresponding path program 1 times [2024-09-12 20:03:17,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 20:03:17,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155800087] [2024-09-12 20:03:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:17,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 20:03:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 20:03:18,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865914063] [2024-09-12 20:03:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:18,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:03:18,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 20:03:18,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 20:03:18,036 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 20:03:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:18,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 165 conjuncts are in the unsatisfiable core [2024-09-12 20:03:18,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 20:03:18,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 20:03:18,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 20:03:18,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:18,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:18,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:18,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:22,864 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((v_func_to_recursive_line_35_to_46_0_~v.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~v.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~x.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~x.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~a.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~a.offset_BEFORE_CALL_1 Int)) (let ((.cse0 (select (select |c_#memory_int#7| v_func_to_recursive_line_35_to_46_0_~a.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~a.offset_BEFORE_CALL_1))) (and (= .cse0 (select (select |c_#memory_int#2| v_func_to_recursive_line_35_to_46_0_~x.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~x.offset_BEFORE_CALL_1)) (= .cse0 (select (select |c_#memory_int#4| v_func_to_recursive_line_35_to_46_0_~v.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~v.offset_BEFORE_CALL_1))))) (exists ((v_func_to_recursive_line_35_to_46_0_~b.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~u.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~u.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~b.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~y.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~y.offset_BEFORE_CALL_1 Int)) (let ((.cse1 (select (select |c_#memory_int#6| v_func_to_recursive_line_35_to_46_0_~b.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~b.offset_BEFORE_CALL_1))) (and (= (select (select |c_#memory_int#5| v_func_to_recursive_line_35_to_46_0_~u.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~u.offset_BEFORE_CALL_1) .cse1) (= (select (select |c_#memory_int#3| v_func_to_recursive_line_35_to_46_0_~y.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~y.offset_BEFORE_CALL_1) .cse1))))) is different from true [2024-09-12 20:03:23,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-09-12 20:03:23,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-12 20:03:23,127 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 42 treesize of output 30 [2024-09-12 20:03:23,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2024-09-12 20:03:23,153 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 50 treesize of output 34 [2024-09-12 20:03:23,159 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 57 treesize of output 37 [2024-09-12 20:03:23,165 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 50 treesize of output 30 [2024-09-12 20:03:23,173 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 28 treesize of output 16 [2024-09-12 20:03:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 2 not checked. [2024-09-12 20:03:23,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 20:03:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 20:03:24,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 20:03:24,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155800087] [2024-09-12 20:03:24,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 20:03:24,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865914063] [2024-09-12 20:03:24,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865914063] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 20:03:24,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 20:03:24,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-12 20:03:24,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133306572] [2024-09-12 20:03:24,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 20:03:24,499 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 20:03:24,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 20:03:24,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 20:03:24,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=152, Unknown=1, NotChecked=24, Total=210 [2024-09-12 20:03:24,500 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 15 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-12 20:03:40,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-12 20:03:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 20:03:41,589 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2024-09-12 20:03:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 20:03:41,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2024-09-12 20:03:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 20:03:41,591 INFO L225 Difference]: With dead ends: 66 [2024-09-12 20:03:41,591 INFO L226 Difference]: Without dead ends: 62 [2024-09-12 20:03:41,592 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=4, NotChecked=42, Total=552 [2024-09-12 20:03:41,592 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-12 20:03:41,593 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 234 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 220 Invalid, 0 Unknown, 72 Unchecked, 3.3s Time] [2024-09-12 20:03:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-12 20:03:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2024-09-12 20:03:41,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-12 20:03:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-12 20:03:41,626 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 47 [2024-09-12 20:03:41,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 20:03:41,627 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-12 20:03:41,627 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-12 20:03:41,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-12 20:03:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 20:03:41,629 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 20:03:41,629 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 20:03:41,641 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 20:03:41,829 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:03:41,830 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 20:03:41,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:41,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1433843150, now seen corresponding path program 1 times [2024-09-12 20:03:41,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 20:03:41,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082523757] [2024-09-12 20:03:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:41,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 20:03:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 20:03:41,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505437457] [2024-09-12 20:03:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:41,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:03:41,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 20:03:41,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 20:03:41,985 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 20:03:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:42,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-09-12 20:03:42,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 20:03:42,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 20:03:42,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 20:03:42,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:42,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:42,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:42,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:03:42,523 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 11 treesize of output 7 [2024-09-12 20:03:42,527 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 11 treesize of output 7 [2024-09-12 20:03:42,537 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 11 treesize of output 7 [2024-09-12 20:03:42,541 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 11 treesize of output 7 [2024-09-12 20:03:44,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-09-12 20:03:44,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-12 20:03:45,116 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 42 treesize of output 30 [2024-09-12 20:03:45,125 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 30 treesize of output 22 [2024-09-12 20:03:45,132 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 50 treesize of output 34 [2024-09-12 20:03:45,137 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 33 treesize of output 21 [2024-09-12 20:03:45,140 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 22 treesize of output 10 [2024-09-12 20:03:45,145 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 27 treesize of output 15 [2024-09-12 20:03:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-12 20:03:45,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 20:04:33,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 20:04:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082523757] [2024-09-12 20:04:33,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 20:04:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505437457] [2024-09-12 20:04:33,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505437457] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 20:04:33,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 20:04:33,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-12 20:04:33,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177277129] [2024-09-12 20:04:33,766 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 20:04:33,766 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 20:04:33,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 20:04:33,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 20:04:33,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=355, Unknown=6, NotChecked=0, Total=420 [2024-09-12 20:04:33,768 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 15 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-12 20:05:04,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 20:05:04,468 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2024-09-12 20:05:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 20:05:04,471 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 59 [2024-09-12 20:05:04,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 20:05:04,472 INFO L225 Difference]: With dead ends: 75 [2024-09-12 20:05:04,473 INFO L226 Difference]: Without dead ends: 65 [2024-09-12 20:05:04,473 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 58.8s TimeCoverageRelationStatistics Valid=117, Invalid=688, Unknown=7, NotChecked=0, Total=812 [2024-09-12 20:05:04,474 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2024-09-12 20:05:04,474 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 105 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2024-09-12 20:05:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-12 20:05:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-09-12 20:05:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 15 states have call successors, (15), 11 states have call predecessors, (15), 8 states have return successors, (18), 11 states have call predecessors, (18), 13 states have call successors, (18) [2024-09-12 20:05:04,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2024-09-12 20:05:04,497 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 59 [2024-09-12 20:05:04,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 20:05:04,497 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2024-09-12 20:05:04,497 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-12 20:05:04,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:05:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2024-09-12 20:05:04,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 20:05:04,499 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 20:05:04,500 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 20:05:04,508 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 20:05:04,700 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:05:04,700 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 20:05:04,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:05:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2043475696, now seen corresponding path program 1 times [2024-09-12 20:05:04,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 20:05:04,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861925199] [2024-09-12 20:05:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:05:04,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 20:05:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 20:05:04,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007624008] [2024-09-12 20:05:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:05:04,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:05:04,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 20:05:04,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 20:05:04,832 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 20:05:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:05:05,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-09-12 20:05:05,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 20:05:05,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 20:05:05,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 20:05:05,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:05:05,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:05:05,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:05:05,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:05:06,214 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 11 treesize of output 7 [2024-09-12 20:05:06,272 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 11 treesize of output 7 [2024-09-12 20:05:06,499 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 11 treesize of output 7 [2024-09-12 20:05:06,559 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 11 treesize of output 7 [2024-09-12 20:05:22,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-09-12 20:05:22,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-12 20:05:24,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2024-09-12 20:05:24,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2024-09-12 20:05:24,398 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 38 treesize of output 26 [2024-09-12 20:05:24,457 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 46 treesize of output 30 [2024-09-12 20:05:24,518 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 22 treesize of output 14 [2024-09-12 20:05:24,577 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 27 treesize of output 15 [2024-09-12 20:05:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-12 20:05:26,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 20:05:49,615 WARN L293 SmtUtils]: Spent 7.64s on a formula simplification that was a NOOP. DAG size: 169 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-12 20:06:12,011 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_func_to_recursive_line_35_to_46_0_#in~x.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~x.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~y.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~v.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~b.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~a.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~y.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~a.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~v.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~u.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~b.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~u.offset_BEFORE_CALL_8| Int)) (let ((.cse0 (* 2 (mod (* (select (select |c_#memory_int#6| |v_func_to_recursive_line_35_to_46_0_#in~b.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~b.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#7| |v_func_to_recursive_line_35_to_46_0_#in~a.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~a.offset_BEFORE_CALL_8|)) 2147483648)))) (or (not (= (mod (+ (* (select (select |c_old(#memory_int#5)| |v_func_to_recursive_line_35_to_46_0_#in~u.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~u.offset_BEFORE_CALL_8|) (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_35_to_46_0_#in~x.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~x.offset_BEFORE_CALL_8|)) (* (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_35_to_46_0_#in~y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~y.offset_BEFORE_CALL_8|) (select (select |c_old(#memory_int#4)| |v_func_to_recursive_line_35_to_46_0_#in~v.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~v.offset_BEFORE_CALL_8|))) 4294967296) .cse0)) (= (mod (+ (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_35_to_46_0_#in~x.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~x.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_35_to_46_0_#in~u.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~u.offset_BEFORE_CALL_8|)) (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_35_to_46_0_#in~v.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~v.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#3| |v_func_to_recursive_line_35_to_46_0_#in~y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~y.offset_BEFORE_CALL_8|))) 4294967296) .cse0)))) (or (= (* 2 (mod (* (select (select |c_#memory_int#7| |c_func_to_recursive_line_35_to_46_0_#in~a.base|) |c_func_to_recursive_line_35_to_46_0_#in~a.offset|) (select (select |c_#memory_int#6| |c_func_to_recursive_line_35_to_46_0_#in~b.base|) |c_func_to_recursive_line_35_to_46_0_#in~b.offset|)) 2147483648)) (mod (+ (* (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_35_to_46_0_#in~v.base|) |c_func_to_recursive_line_35_to_46_0_#in~v.offset|) (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_35_to_46_0_#in~y.base|) |c_func_to_recursive_line_35_to_46_0_#in~y.offset|)) (* (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_35_to_46_0_#in~u.base|) |c_func_to_recursive_line_35_to_46_0_#in~u.offset|) (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_35_to_46_0_#in~x.base|) |c_func_to_recursive_line_35_to_46_0_#in~x.offset|))) 4294967296)) (forall ((|v_func_to_recursive_line_35_to_46_0_#in~x.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~y.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~x.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~v.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~b.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~a.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~y.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~a.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~v.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~u.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~b.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_35_to_46_0_#in~u.offset_BEFORE_CALL_8| Int)) (= (mod (+ (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_35_to_46_0_#in~x.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~x.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_35_to_46_0_#in~u.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~u.offset_BEFORE_CALL_8|)) (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_35_to_46_0_#in~v.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~v.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#3| |v_func_to_recursive_line_35_to_46_0_#in~y.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~y.offset_BEFORE_CALL_8|))) 4294967296) (* 2 (mod (* (select (select |c_#memory_int#6| |v_func_to_recursive_line_35_to_46_0_#in~b.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~b.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#7| |v_func_to_recursive_line_35_to_46_0_#in~a.base_BEFORE_CALL_8|) |v_func_to_recursive_line_35_to_46_0_#in~a.offset_BEFORE_CALL_8|)) 2147483648)))))) is different from false [2024-09-12 20:06:19,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 20:06:19,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861925199] [2024-09-12 20:06:19,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 20:06:19,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007624008] [2024-09-12 20:06:19,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007624008] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 20:06:19,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 20:06:19,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-12 20:06:19,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433742225] [2024-09-12 20:06:19,114 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 20:06:19,115 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 20:06:19,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 20:06:19,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 20:06:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=327, Unknown=2, NotChecked=36, Total=420 [2024-09-12 20:06:19,116 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 15 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-12 20:06:35,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-12 20:06:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 20:06:46,507 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2024-09-12 20:06:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 20:06:46,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 59 [2024-09-12 20:06:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 20:06:46,509 INFO L225 Difference]: With dead ends: 73 [2024-09-12 20:06:46,509 INFO L226 Difference]: Without dead ends: 67 [2024-09-12 20:06:46,510 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=111, Invalid=647, Unknown=2, NotChecked=52, Total=812 [2024-09-12 20:06:46,511 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2024-09-12 20:06:46,511 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 128 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time] [2024-09-12 20:06:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-12 20:06:46,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-12 20:06:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 15 states have call successors, (15), 11 states have call predecessors, (15), 8 states have return successors, (18), 11 states have call predecessors, (18), 13 states have call successors, (18) [2024-09-12 20:06:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2024-09-12 20:06:46,537 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 59 [2024-09-12 20:06:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 20:06:46,538 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2024-09-12 20:06:46,538 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-12 20:06:46,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:06:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2024-09-12 20:06:46,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-12 20:06:46,540 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 20:06:46,541 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 20:06:46,549 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 20:06:46,742 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 20:06:46,743 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 20:06:46,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:06:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1316899042, now seen corresponding path program 1 times [2024-09-12 20:06:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 20:06:46,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702628165] [2024-09-12 20:06:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:06:46,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 20:06:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 20:06:46,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195212889] [2024-09-12 20:06:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:06:46,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:06:46,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 20:06:46,836 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 20:06:46,837 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 20:06:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:06:47,725 WARN L260 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 248 conjuncts are in the unsatisfiable core [2024-09-12 20:06:47,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 20:06:47,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 20:06:47,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-12 20:06:47,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:06:48,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:06:48,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:06:48,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 20:06:48,731 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 11 treesize of output 7 [2024-09-12 20:06:48,796 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 11 treesize of output 7 [2024-09-12 20:06:49,032 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 11 treesize of output 7 [2024-09-12 20:06:49,096 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 11 treesize of output 7 [2024-09-12 20:07:15,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2024-09-12 20:07:15,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2024-09-12 20:07:15,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-09-12 20:07:15,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-09-12 20:07:17,160 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 66 treesize of output 54 [2024-09-12 20:07:17,224 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 110 treesize of output 86 [2024-09-12 20:07:17,306 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 140 treesize of output 112 [2024-09-12 20:07:17,383 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 105 treesize of output 81 [2024-09-12 20:07:17,447 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 68 treesize of output 60 [2024-09-12 20:07:17,507 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 97 treesize of output 57 [2024-09-12 20:07:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 20:07:20,961 INFO L327 TraceCheckSpWp]: Computing backward predicates...