./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 --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_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 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 20:03:00,523 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 20:03:00,587 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 20:03:00,592 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 20:03:00,592 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 20:03:00,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 20:03:00,616 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 20:03:00,616 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 20:03:00,616 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 20:03:00,617 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 20:03:00,617 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 20:03:00,617 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 20:03:00,619 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 20:03:00,620 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 20:03:00,621 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 20:03:00,621 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 20:03:00,621 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 20:03:00,621 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 20:03:00,623 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 20:03:00,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 20:03:00,623 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 20:03:00,624 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 20:03:00,624 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 20:03:00,624 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 20:03:00,624 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 20:03:00,626 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 20:03:00,626 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 20:03:00,631 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 20:03:00,631 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 20:03:00,631 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 20:03:00,631 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 20:03:00,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 20:03:00,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 20:03:00,632 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 20:03:00,632 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 20:03:00,632 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 20:03:00,632 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 20:03:00,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 20:03:00,632 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 20:03:00,633 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 20:03:00,633 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 20:03:00,637 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 20:03:00,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2024-09-12 20:03:00,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 20:03:00,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 20:03:00,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 20:03:00,967 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 20:03:00,968 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 20:03:00,968 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-09-12 20:03:02,337 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 20:03:02,515 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 20:03:02,516 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-09-12 20:03:02,524 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/40f7c2809/4e581e80cd074213a22116eb04d7ca70/FLAGa21c2f690 [2024-09-12 20:03:02,536 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/40f7c2809/4e581e80cd074213a22116eb04d7ca70 [2024-09-12 20:03:02,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 20:03:02,540 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 20:03:02,551 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 20:03:02,551 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 20:03:02,556 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 20:03:02,558 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,559 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@199e3c22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02, skipping insertion in model container [2024-09-12 20:03:02,559 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,575 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 20:03:02,691 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_lcm1.c[1106,1119] [2024-09-12 20:03:02,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 20:03:02,725 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 20:03:02,736 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_lcm1.c[1106,1119] [2024-09-12 20:03:02,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 20:03:02,764 INFO L204 MainTranslator]: Completed translation [2024-09-12 20:03:02,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02 WrapperNode [2024-09-12 20:03:02,765 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 20:03:02,766 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 20:03:02,766 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 20:03:02,766 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 20:03:02,770 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,778 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,783 INFO L138 Inliner]: procedures = 18, calls = 104, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 20:03:02,784 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 20:03:02,785 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 20:03:02,785 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 20:03:02,785 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 20:03:02,792 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,798 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,821 INFO L175 MemorySlicer]: Split 66 memory accesses to 8 slices as follows [2, 7, 8, 9, 11, 13, 8, 8]. 20 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 0, 1, 1, 2, 2, 2, 2]. [2024-09-12 20:03:02,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,831 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,835 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,837 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,839 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 20:03:02,842 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 20:03:02,843 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 20:03:02,843 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 20:03:02,843 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (1/1) ... [2024-09-12 20:03:02,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 20:03:02,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 20:03:02,870 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 20:03:02,872 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 20:03:02,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 20:03:02,905 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_38_0 [2024-09-12 20:03:02,905 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_38_0 [2024-09-12 20:03:02,905 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_48_to_53_0 [2024-09-12 20:03:02,905 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_48_to_53_0 [2024-09-12 20:03:02,906 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 20:03:02,906 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 20:03:02,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 20:03:02,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 20:03:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 20:03:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 20:03:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-12 20:03:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-12 20:03:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-12 20:03:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-12 20:03:02,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-12 20:03:02,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-12 20:03:02,908 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_45_0 [2024-09-12 20:03:02,908 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_45_0 [2024-09-12 20:03:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-12 20:03:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-12 20:03:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-12 20:03:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-12 20:03:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-12 20:03:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-12 20:03:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-12 20:03:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-12 20:03:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-12 20:03:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 20:03:02,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 20:03:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 20:03:02,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 20:03:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-12 20:03:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-12 20:03:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-12 20:03:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-12 20:03:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-12 20:03:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-12 20:03:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-12 20:03:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-12 20:03:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 20:03:02,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 20:03:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-12 20:03:03,012 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 20:03:03,014 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 20:03:03,261 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-12 20:03:03,261 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 20:03:03,277 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 20:03:03,277 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-12 20:03:03,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 08:03:03 BoogieIcfgContainer [2024-09-12 20:03:03,278 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 20:03:03,279 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 20:03:03,279 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 20:03:03,282 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 20:03:03,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 08:03:02" (1/3) ... [2024-09-12 20:03:03,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3ce483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 08:03:03, skipping insertion in model container [2024-09-12 20:03:03,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 08:03:02" (2/3) ... [2024-09-12 20:03:03,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3ce483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 08:03:03, skipping insertion in model container [2024-09-12 20:03:03,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 08:03:03" (3/3) ... [2024-09-12 20:03:03,288 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm1.c [2024-09-12 20:03:03,301 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 20:03:03,302 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 20:03:03,344 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 20:03:03,350 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;@4d748f37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 20:03:03,350 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 20:03:03,354 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) [2024-09-12 20:03:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 20:03:03,361 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 20:03:03,361 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 20:03:03,362 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 20:03:03,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:03,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1037831488, now seen corresponding path program 1 times [2024-09-12 20:03:03,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 20:03:03,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935762463] [2024-09-12 20:03:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:03,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 20:03:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:03,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 20:03:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:03,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 20:03:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:03,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 20:03:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:03,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 20:03:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:03,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 20:03:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:03,582 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 20:03:03,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 20:03:03,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935762463] [2024-09-12 20:03:03,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935762463] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 20:03:03,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 20:03:03,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 20:03:03,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621595140] [2024-09-12 20:03:03,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 20:03:03,591 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 20:03:03,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 20:03:03,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 20:03:03,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 20:03:03,609 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) [2024-09-12 20:03:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 20:03:03,640 INFO L93 Difference]: Finished difference Result 110 states and 158 transitions. [2024-09-12 20:03:03,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 20:03:03,642 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 20:03:03,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 20:03:03,648 INFO L225 Difference]: With dead ends: 110 [2024-09-12 20:03:03,648 INFO L226 Difference]: Without dead ends: 54 [2024-09-12 20:03:03,651 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 20:03:03,653 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 [2024-09-12 20:03:03,654 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] [2024-09-12 20:03:03,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-12 20:03:03,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-12 20:03:03,689 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) [2024-09-12 20:03:03,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-12 20:03:03,692 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 36 [2024-09-12 20:03:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 20:03:03,694 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-12 20:03:03,694 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 20:03:03,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-12 20:03:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 20:03:03,698 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 20:03:03,698 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 20:03:03,698 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 20:03:03,698 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 20:03:03,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:03,701 INFO L85 PathProgramCache]: Analyzing trace with hash -268686776, now seen corresponding path program 1 times [2024-09-12 20:03:03,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 20:03:03,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191868410] [2024-09-12 20:03:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:03,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 20:03:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 20:03:03,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844865363] [2024-09-12 20:03:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:03,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:03:03,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 20:03:03,771 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 20:03:03,773 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 20:03:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:03,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-12 20:03:03,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 20:03:04,013 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 20:03:04,015 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 20:03:04,027 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 20:03:04,034 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 [2024-09-12 20:03:04,039 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 20:03:04,123 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 [2024-09-12 20:03:04,126 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 20:03:04,136 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 [2024-09-12 20:03:04,140 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 15 treesize of output 7 [2024-09-12 20:03:04,180 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 20:03:04,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 20:03:04,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 20:03:04,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191868410] [2024-09-12 20:03:04,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 20:03:04,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844865363] [2024-09-12 20:03:04,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844865363] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 20:03:04,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 20:03:04,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 20:03:04,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740738773] [2024-09-12 20:03:04,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 20:03:04,185 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 20:03:04,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 20:03:04,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 20:03:04,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-12 20:03:04,186 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) [2024-09-12 20:03:04,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 20:03:04,427 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-09-12 20:03:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 20:03:04,427 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 20:03:04,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 20:03:04,429 INFO L225 Difference]: With dead ends: 69 [2024-09-12 20:03:04,430 INFO L226 Difference]: Without dead ends: 67 [2024-09-12 20:03:04,430 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 [2024-09-12 20:03:04,431 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 [2024-09-12 20:03:04,431 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] [2024-09-12 20:03:04,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-12 20:03:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-12 20:03:04,449 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) [2024-09-12 20:03:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-09-12 20:03:04,450 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 36 [2024-09-12 20:03:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 20:03:04,450 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-09-12 20:03:04,451 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 20:03:04,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-09-12 20:03:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 20:03:04,452 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 20:03:04,452 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 20:03:04,461 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 20:03:04,656 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 20:03:04,657 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 20:03:04,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:04,658 INFO L85 PathProgramCache]: Analyzing trace with hash -670583387, now seen corresponding path program 1 times [2024-09-12 20:03:04,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 20:03:04,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784894598] [2024-09-12 20:03:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:04,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 20:03:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 20:03:04,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270098993] [2024-09-12 20:03:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:04,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:03:04,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 20:03:04,748 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 20:03:04,751 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 20:03:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 20:03:04,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-09-12 20:03:04,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 20:03:04,933 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 20:03:04,935 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 20:03:04,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 20:03:04,943 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 20:03:04,948 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 20:03:05,211 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 [2024-09-12 20:03:05,214 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 15 treesize of output 7 [2024-09-12 20:03:05,221 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 [2024-09-12 20:03:05,225 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 20:03:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 20:03:05,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 20:03:06,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 20:03:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784894598] [2024-09-12 20:03:06,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 20:03:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270098993] [2024-09-12 20:03:06,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270098993] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 20:03:06,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 20:03:06,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-12 20:03:06,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994982414] [2024-09-12 20:03:06,426 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 20:03:06,427 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 20:03:06,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 20:03:06,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 20:03:06,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-12 20:03:06,428 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-12 20:03:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 20:03:07,014 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2024-09-12 20:03:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 20:03:07,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-09-12 20:03:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 20:03:07,020 INFO L225 Difference]: With dead ends: 115 [2024-09-12 20:03:07,020 INFO L226 Difference]: Without dead ends: 113 [2024-09-12 20:03:07,020 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-12 20:03:07,021 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 58 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 20:03:07,021 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 400 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 20:03:07,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-12 20:03:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2024-09-12 20:03:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 72 states have internal predecessors, (76), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2024-09-12 20:03:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2024-09-12 20:03:07,054 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 46 [2024-09-12 20:03:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 20:03:07,055 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2024-09-12 20:03:07,055 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-12 20:03:07,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:07,055 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2024-09-12 20:03:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 20:03:07,056 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 20:03:07,056 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 20:03:07,063 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 20:03:07,260 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 20:03:07,261 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 20:03:07,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 20:03:07,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1067334788, now seen corresponding path program 1 times [2024-09-12 20:03:07,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 20:03:07,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472559128] [2024-09-12 20:03:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:07,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 20:03:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 20:03:07,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104803558] [2024-09-12 20:03:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 20:03:07,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 20:03:07,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 20:03:07,340 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 20:03:07,343 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process