./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 20:00:57,043 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 20:00:57,114 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 20:00:57,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 20:00:57,121 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 20:00:57,152 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 20:00:57,152 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 20:00:57,153 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 20:00:57,154 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 20:00:57,155 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 20:00:57,155 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 20:00:57,156 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 20:00:57,156 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 20:00:57,157 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 20:00:57,158 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 20:00:57,159 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 20:00:57,159 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 20:00:57,159 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 20:00:57,160 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 20:00:57,160 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 20:00:57,163 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 20:00:57,164 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 20:00:57,165 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 20:00:57,165 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 20:00:57,165 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 20:00:57,165 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 20:00:57,166 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 20:00:57,166 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 20:00:57,166 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 20:00:57,166 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 20:00:57,167 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 20:00:57,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 20:00:57,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 20:00:57,168 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 20:00:57,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 20:00:57,169 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 20:00:57,170 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 20:00:57,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 20:00:57,170 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 20:00:57,170 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 20:00:57,171 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 20:00:57,171 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 20:00:57,172 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 20:00:57,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 20:00:57,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 20:00:57,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 20:00:57,453 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 20:00:57,453 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 20:00:57,454 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-09-20 20:00:58,928 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 20:00:59,116 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 20:00:59,117 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-09-20 20:00:59,124 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/bda03ec57/34a8acd0361f4009b0dc0b7f47508f30/FLAGac739a3c1 [2024-09-20 20:00:59,501 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/bda03ec57/34a8acd0361f4009b0dc0b7f47508f30 [2024-09-20 20:00:59,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 20:00:59,505 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 20:00:59,506 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 20:00:59,507 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 20:00:59,513 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 20:00:59,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c80cc04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59, skipping insertion in model container [2024-09-20 20:00:59,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,540 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 20:00:59,695 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c[1106,1119] [2024-09-20 20:00:59,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 20:00:59,740 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 20:00:59,756 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c[1106,1119] [2024-09-20 20:00:59,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 20:00:59,806 INFO L204 MainTranslator]: Completed translation [2024-09-20 20:00:59,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59 WrapperNode [2024-09-20 20:00:59,810 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 20:00:59,811 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 20:00:59,811 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 20:00:59,811 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 20:00:59,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,830 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,845 INFO L138 Inliner]: procedures = 18, calls = 104, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 20:00:59,848 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 20:00:59,849 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 20:00:59,849 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 20:00:59,849 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 20:00:59,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,860 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,863 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,903 INFO L175 MemorySlicer]: Split 66 memory accesses to 8 slices as follows [8, 2, 7, 9, 8, 8, 13, 11]. 20 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [0, 2, 7, 0, 0, 0, 0, 0]. The 10 writes are split as follows [1, 0, 0, 1, 2, 2, 2, 2]. [2024-09-20 20:00:59,905 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,905 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,914 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,920 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,924 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,925 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,932 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 20:00:59,937 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 20:00:59,937 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 20:00:59,937 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 20:00:59,938 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (1/1) ... [2024-09-20 20:00:59,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 20:00:59,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:00:59,974 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) [2024-09-20 20:00:59,978 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 [2024-09-20 20:01:00,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 20:01:00,023 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_38_0 [2024-09-20 20:01:00,024 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_38_0 [2024-09-20 20:01:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_48_to_53_0 [2024-09-20 20:01:00,024 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_48_to_53_0 [2024-09-20 20:01:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 20:01:00,024 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 20:01:00,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 20:01:00,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 20:01:00,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 20:01:00,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 20:01:00,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 20:01:00,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 20:01:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 20:01:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 20:01:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-20 20:01:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-20 20:01:00,029 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_45_0 [2024-09-20 20:01:00,029 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_45_0 [2024-09-20 20:01:00,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 20:01:00,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 20:01:00,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 20:01:00,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 20:01:00,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 20:01:00,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 20:01:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 20:01:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-20 20:01:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-20 20:01:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 20:01:00,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 20:01:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 20:01:00,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 20:01:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 20:01:00,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 20:01:00,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 20:01:00,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 20:01:00,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 20:01:00,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 20:01:00,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-20 20:01:00,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-20 20:01:00,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 20:01:00,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 20:01:00,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 20:01:00,162 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 20:01:00,164 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 20:01:00,446 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-20 20:01:00,447 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 20:01:00,480 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 20:01:00,480 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-20 20:01:00,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:01:00 BoogieIcfgContainer [2024-09-20 20:01:00,481 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 20:01:00,483 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 20:01:00,483 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 20:01:00,487 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 20:01:00,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 08:00:59" (1/3) ... [2024-09-20 20:01:00,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d267280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:01:00, skipping insertion in model container [2024-09-20 20:01:00,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:00:59" (2/3) ... [2024-09-20 20:01:00,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d267280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:01:00, skipping insertion in model container [2024-09-20 20:01:00,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:01:00" (3/3) ... [2024-09-20 20:01:00,489 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm1.c [2024-09-20 20:01:00,502 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 20:01:00,503 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 20:01:00,552 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 20:01:00,558 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;@49c8add0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 20:01:00,558 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 20:01:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 20:01:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 20:01:00,567 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:00,568 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] [2024-09-20 20:01:00,568 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:00,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:00,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1037831488, now seen corresponding path program 1 times [2024-09-20 20:01:00,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:00,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163715303] [2024-09-20 20:01:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:00,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:00,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:01:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:00,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:01:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:00,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 20:01:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:00,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 20:01:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:00,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 20:01:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 20:01:00,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:00,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163715303] [2024-09-20 20:01:00,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163715303] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:01:00,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:01:00,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 20:01:00,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538411137] [2024-09-20 20:01:00,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:01:00,815 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 20:01:00,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:00,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 20:01:00,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 20:01:00,836 INFO L87 Difference]: Start difference. First operand has 58 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 20:01:00,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:00,873 INFO L93 Difference]: Finished difference Result 110 states and 158 transitions. [2024-09-20 20:01:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 20:01:00,890 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 [2024-09-20 20:01:00,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:00,904 INFO L225 Difference]: With dead ends: 110 [2024-09-20 20:01:00,908 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 20:01:00,913 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 [2024-09-20 20:01:00,918 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:00,920 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 20:01:00,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 20:01:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-20 20:01:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 34 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-20 20:01:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-20 20:01:00,993 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 36 [2024-09-20 20:01:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:00,993 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-20 20:01:00,994 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) [2024-09-20 20:01:00,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:00,994 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-20 20:01:00,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 20:01:00,996 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:00,997 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] [2024-09-20 20:01:00,997 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 20:01:00,997 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:00,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:00,998 INFO L85 PathProgramCache]: Analyzing trace with hash -268686776, now seen corresponding path program 1 times [2024-09-20 20:01:00,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:00,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691018433] [2024-09-20 20:01:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:00,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:01,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116511021] [2024-09-20 20:01:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:01,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:01,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:01,146 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) [2024-09-20 20:01:01,147 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 20:01:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:01,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-20 20:01:01,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:01,450 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 [2024-09-20 20:01:01,455 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 [2024-09-20 20:01:01,469 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 11 [2024-09-20 20:01:01,480 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 [2024-09-20 20:01:01,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:01:01,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 20:01:01,644 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 [2024-09-20 20:01:01,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 20:01:01,660 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 [2024-09-20 20:01:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 20:01:01,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 20:01:01,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:01,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691018433] [2024-09-20 20:01:01,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:01,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116511021] [2024-09-20 20:01:01,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116511021] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:01:01,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:01:01,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 20:01:01,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985830075] [2024-09-20 20:01:01,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:01:01,719 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 20:01:01,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:01,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 20:01:01,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 20:01:01,721 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 20:01:01,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:01,979 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-09-20 20:01:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 20:01:01,980 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 [2024-09-20 20:01:01,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:01,983 INFO L225 Difference]: With dead ends: 69 [2024-09-20 20:01:01,983 INFO L226 Difference]: Without dead ends: 67 [2024-09-20 20:01:01,983 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 20:01:01,984 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 14 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:01,985 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 348 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:01:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-20 20:01:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-20 20:01:02,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 38 states have (on average 1.131578947368421) internal successors, (43), 42 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-20 20:01:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-09-20 20:01:02,007 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 36 [2024-09-20 20:01:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:02,008 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-09-20 20:01:02,008 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) [2024-09-20 20:01:02,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:02,009 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-09-20 20:01:02,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 20:01:02,010 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:02,010 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] [2024-09-20 20:01:02,020 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 20:01:02,211 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 [2024-09-20 20:01:02,211 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:02,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:02,213 INFO L85 PathProgramCache]: Analyzing trace with hash -670583387, now seen corresponding path program 1 times [2024-09-20 20:01:02,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:02,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990450590] [2024-09-20 20:01:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:02,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:02,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559129422] [2024-09-20 20:01:02,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:02,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:02,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:02,355 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) [2024-09-20 20:01:02,379 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 20:01:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:02,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 162 conjuncts are in the unsatisfiable core [2024-09-20 20:01:02,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:02,692 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 [2024-09-20 20:01:02,694 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 [2024-09-20 20:01:02,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:01:02,709 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 [2024-09-20 20:01:02,716 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 [2024-09-20 20:01:02,724 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 [2024-09-20 20:01:03,339 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 [2024-09-20 20:01:03,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 20:01:03,348 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 [2024-09-20 20:01:03,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 20:01:03,359 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 [2024-09-20 20:01:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 20:01:03,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:01:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 20:01:05,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:05,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990450590] [2024-09-20 20:01:05,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:05,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559129422] [2024-09-20 20:01:05,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559129422] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 20:01:05,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 20:01:05,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2024-09-20 20:01:05,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108811105] [2024-09-20 20:01:05,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 20:01:05,214 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 20:01:05,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:05,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 20:01:05,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-09-20 20:01:05,215 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 21 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 20:01:08,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-20 20:01:13,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:01:17,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:01:19,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 20:01:23,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-20 20:01:42,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 18.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-20 20:02:13,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 31.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-20 20:02:15,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-20 20:02:30,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 13.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-20 20:02:56,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 25.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-20 20:03:21,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 25.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-20 20:03:33,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 11.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-20 20:03:56,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 18.95s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-20 20:03:57,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:03:59,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 20:03:59,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:03:59,536 INFO L93 Difference]: Finished difference Result 128 states and 160 transitions. [2024-09-20 20:03:59,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 20:03:59,536 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-09-20 20:03:59,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:03:59,539 INFO L225 Difference]: With dead ends: 128 [2024-09-20 20:03:59,539 INFO L226 Difference]: Without dead ends: 126 [2024-09-20 20:03:59,540 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 20:03:59,541 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 70 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 29 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:03:59,542 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 570 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 621 Invalid, 10 Unknown, 0 Unchecked, 170.6s Time] [2024-09-20 20:03:59,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-09-20 20:03:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2024-09-20 20:03:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 72 states have internal predecessors, (76), 26 states have call successors, (26), 15 states have call predecessors, (26), 17 states have return successors, (32), 24 states have call predecessors, (32), 23 states have call successors, (32) [2024-09-20 20:03:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2024-09-20 20:03:59,589 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 46 [2024-09-20 20:03:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:03:59,589 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2024-09-20 20:03:59,590 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 20:03:59,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2024-09-20 20:03:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 20:03:59,594 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:03:59,594 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] [2024-09-20 20:03:59,602 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 20:03:59,798 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 [2024-09-20 20:03:59,799 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:03:59,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:03:59,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1067334788, now seen corresponding path program 1 times [2024-09-20 20:03:59,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:03:59,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167748579] [2024-09-20 20:03:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:59,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:03:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:03:59,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810181612] [2024-09-20 20:03:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:03:59,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:03:59,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:03:59,880 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) [2024-09-20 20:03:59,884 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process