./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 08:04:08,833 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 08:04:08,887 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 08:04:08,893 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 08:04:08,893 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 08:04:08,911 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 08:04:08,911 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 08:04:08,911 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 08:04:08,912 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 08:04:08,912 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 08:04:08,912 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 08:04:08,912 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 08:04:08,913 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 08:04:08,913 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 08:04:08,913 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 08:04:08,913 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 08:04:08,914 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 08:04:08,914 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 08:04:08,916 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 08:04:08,916 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 08:04:08,919 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 08:04:08,919 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 08:04:08,919 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 08:04:08,919 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 08:04:08,919 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 08:04:08,920 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 08:04:08,920 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 08:04:08,920 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 08:04:08,920 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 08:04:08,920 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 08:04:08,920 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 08:04:08,921 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 08:04:08,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 08:04:08,921 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 08:04:08,921 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 08:04:08,921 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 08:04:08,922 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 08:04:08,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 08:04:08,922 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 08:04:08,923 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 08:04:08,924 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 08:04:08,924 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 08:04:08,924 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/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 [2024-11-16 08:04:09,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 08:04:09,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 08:04:09,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 08:04:09,163 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 08:04:09,164 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 08:04:09,165 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-11-16 08:04:10,522 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 08:04:10,688 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 08:04:10,689 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-11-16 08:04:10,694 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7def7f4bf/b5f7af3dc2a84d96bb9bf79e22563bb5/FLAGc3e055a56 [2024-11-16 08:04:10,704 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7def7f4bf/b5f7af3dc2a84d96bb9bf79e22563bb5 [2024-11-16 08:04:10,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 08:04:10,706 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 08:04:10,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 08:04:10,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 08:04:10,711 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 08:04:10,712 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70718559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10, skipping insertion in model container [2024-11-16 08:04:10,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,728 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 08:04:10,842 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c[1106,1119] [2024-11-16 08:04:10,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 08:04:10,866 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 08:04:10,874 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c[1106,1119] [2024-11-16 08:04:10,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 08:04:10,895 INFO L204 MainTranslator]: Completed translation [2024-11-16 08:04:10,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10 WrapperNode [2024-11-16 08:04:10,896 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 08:04:10,897 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 08:04:10,897 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 08:04:10,897 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 08:04:10,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,916 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,929 INFO L138 Inliner]: procedures = 18, calls = 104, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 95 [2024-11-16 08:04:10,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 08:04:10,929 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 08:04:10,929 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 08:04:10,930 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 08:04:10,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,939 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,951 INFO L175 MemorySlicer]: Split 66 memory accesses to 8 slices as follows [2, 7, 13, 11, 8, 8, 9, 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, 2, 2, 2, 2, 1, 1]. [2024-11-16 08:04:10,952 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,952 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,958 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,958 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,960 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,961 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,963 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 08:04:10,964 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 08:04:10,964 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 08:04:10,964 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 08:04:10,964 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (1/1) ... [2024-11-16 08:04:10,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 08:04:10,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:04:10,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 08:04:10,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 08:04:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 08:04:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_38_0 [2024-11-16 08:04:11,018 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_38_0 [2024-11-16 08:04:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_48_to_53_0 [2024-11-16 08:04:11,018 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_48_to_53_0 [2024-11-16 08:04:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-16 08:04:11,018 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-16 08:04:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 08:04:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 08:04:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 08:04:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 08:04:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-16 08:04:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-16 08:04:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-16 08:04:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-16 08:04:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_45_0 [2024-11-16 08:04:11,020 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_45_0 [2024-11-16 08:04:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 08:04:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 08:04:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 08:04:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 08:04:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 08:04:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-16 08:04:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-16 08:04:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-16 08:04:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-16 08:04:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 08:04:11,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 08:04:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 08:04:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 08:04:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 08:04:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 08:04:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-16 08:04:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-16 08:04:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-16 08:04:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-16 08:04:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 08:04:11,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 08:04:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 08:04:11,138 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 08:04:11,139 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 08:04:11,365 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L122: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset;call ULTIMATE.dealloc(main_~#b~0#1.base, main_~#b~0#1.offset);havoc main_~#b~0#1.base, main_~#b~0#1.offset;call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset;call ULTIMATE.dealloc(main_~#y~0#1.base, main_~#y~0#1.offset);havoc main_~#y~0#1.base, main_~#y~0#1.offset;call ULTIMATE.dealloc(main_~#u~0#1.base, main_~#u~0#1.offset);havoc main_~#u~0#1.base, main_~#u~0#1.offset;call ULTIMATE.dealloc(main_~#v~0#1.base, main_~#v~0#1.offset);havoc main_~#v~0#1.base, main_~#v~0#1.offset; [2024-11-16 08:04:11,394 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-16 08:04:11,394 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 08:04:11,403 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 08:04:11,403 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 08:04:11,404 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 08:04:11 BoogieIcfgContainer [2024-11-16 08:04:11,404 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 08:04:11,406 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 08:04:11,406 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 08:04:11,408 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 08:04:11,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:04:10" (1/3) ... [2024-11-16 08:04:11,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@220d5d80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:04:11, skipping insertion in model container [2024-11-16 08:04:11,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:10" (2/3) ... [2024-11-16 08:04:11,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@220d5d80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:04:11, skipping insertion in model container [2024-11-16 08:04:11,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 08:04:11" (3/3) ... [2024-11-16 08:04:11,410 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm1.c [2024-11-16 08:04:11,422 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 08:04:11,422 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 08:04:11,466 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 08:04:11,471 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@43409996, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 08:04:11,471 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 08:04:11,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 38 states have internal predecessors, (43), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-16 08:04:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-16 08:04:11,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:04:11,480 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:04:11,480 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:04:11,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:04:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1712428703, now seen corresponding path program 1 times [2024-11-16 08:04:11,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:04:11,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781431309] [2024-11-16 08:04:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:04:11,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:04:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:04:11,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:04:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:04:11,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 08:04:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:04:11,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 08:04:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:04:11,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 08:04:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:04:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 08:04:11,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:04:11,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781431309] [2024-11-16 08:04:11,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781431309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 08:04:11,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 08:04:11,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 08:04:11,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051594650] [2024-11-16 08:04:11,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 08:04:11,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 08:04:11,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:04:11,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 08:04:11,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 08:04:11,798 INFO L87 Difference]: Start difference. First operand has 56 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 38 states have internal predecessors, (43), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 08:04:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:04:11,817 INFO L93 Difference]: Finished difference Result 109 states and 157 transitions. [2024-11-16 08:04:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 08:04:11,818 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-11-16 08:04:11,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:04:11,824 INFO L225 Difference]: With dead ends: 109 [2024-11-16 08:04:11,824 INFO L226 Difference]: Without dead ends: 52 [2024-11-16 08:04:11,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 08:04:11,831 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 08:04:11,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 08:04:11,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-16 08:04:11,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-16 08:04:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 35 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-16 08:04:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2024-11-16 08:04:11,871 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 34 [2024-11-16 08:04:11,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:04:11,872 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2024-11-16 08:04:11,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 08:04:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2024-11-16 08:04:11,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-16 08:04:11,875 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:04:11,875 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:04:11,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 08:04:11,875 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:04:11,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:04:11,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1658858333, now seen corresponding path program 1 times [2024-11-16 08:04:11,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:04:11,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549636605] [2024-11-16 08:04:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:04:11,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:04:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 08:04:12,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146188679] [2024-11-16 08:04:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:04:12,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:04:12,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:04:12,032 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:04:12,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 08:04:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:04:12,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-16 08:04:12,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:04:12,343 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 [2024-11-16 08:04:12,346 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 [2024-11-16 08:04:12,363 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 [2024-11-16 08:04:12,369 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 [2024-11-16 08:04:12,374 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 [2024-11-16 08:04:12,453 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 [2024-11-16 08:04:12,458 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 [2024-11-16 08:04:12,466 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 [2024-11-16 08:04:12,471 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 [2024-11-16 08:04:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 08:04:12,518 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 08:04:12,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:04:12,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549636605] [2024-11-16 08:04:12,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 08:04:12,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146188679] [2024-11-16 08:04:12,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146188679] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 08:04:12,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 08:04:12,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-16 08:04:12,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017340855] [2024-11-16 08:04:12,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 08:04:12,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 08:04:12,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:04:12,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 08:04:12,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-16 08:04:12,525 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-16 08:04:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:04:12,750 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2024-11-16 08:04:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 08:04:12,752 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2024-11-16 08:04:12,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:04:12,754 INFO L225 Difference]: With dead ends: 68 [2024-11-16 08:04:12,754 INFO L226 Difference]: Without dead ends: 65 [2024-11-16 08:04:12,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-16 08:04:12,758 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 14 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 08:04:12,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 341 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 08:04:12,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-16 08:04:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2024-11-16 08:04:12,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 43 states have internal predecessors, (44), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2024-11-16 08:04:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-11-16 08:04:12,779 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 34 [2024-11-16 08:04:12,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:04:12,780 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-11-16 08:04:12,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-16 08:04:12,781 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-11-16 08:04:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-16 08:04:12,783 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:04:12,783 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:04:12,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 08:04:12,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:04:12,984 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:04:12,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:04:12,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1258758257, now seen corresponding path program 1 times [2024-11-16 08:04:12,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:04:12,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107919150] [2024-11-16 08:04:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:04:12,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:04:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 08:04:13,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713815294] [2024-11-16 08:04:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:04:13,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:04:13,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:04:13,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:04:13,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 08:04:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:04:13,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-16 08:04:13,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:04:13,333 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 [2024-11-16 08:04:13,339 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 [2024-11-16 08:04:13,351 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 [2024-11-16 08:04:13,365 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 [2024-11-16 08:04:13,375 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 [2024-11-16 08:04:13,611 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 [2024-11-16 08:04:13,616 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 [2024-11-16 08:04:13,623 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 [2024-11-16 08:04:13,629 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 [2024-11-16 08:04:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 08:04:13,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:04:19,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:04:19,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107919150] [2024-11-16 08:04:19,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 08:04:19,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713815294] [2024-11-16 08:04:19,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713815294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:04:19,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-16 08:04:19,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-16 08:04:19,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122156660] [2024-11-16 08:04:19,174 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-16 08:04:19,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 08:04:19,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:04:19,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 08:04:19,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=173, Unknown=1, NotChecked=0, Total=210 [2024-11-16 08:04:19,175 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-16 08:04:19,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:04:19,900 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2024-11-16 08:04:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 08:04:19,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (8), 5 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 44 [2024-11-16 08:04:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:04:19,902 INFO L225 Difference]: With dead ends: 115 [2024-11-16 08:04:19,902 INFO L226 Difference]: Without dead ends: 112 [2024-11-16 08:04:19,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=69, Invalid=310, Unknown=1, NotChecked=0, Total=380 [2024-11-16 08:04:19,903 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 59 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-16 08:04:19,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 374 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-16 08:04:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-16 08:04:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2024-11-16 08:04:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 73 states have internal predecessors, (77), 26 states have call successors, (26), 13 states have call predecessors, (26), 13 states have return successors, (30), 24 states have call predecessors, (30), 24 states have call successors, (30) [2024-11-16 08:04:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2024-11-16 08:04:19,916 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 44 [2024-11-16 08:04:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:04:19,917 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2024-11-16 08:04:19,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-16 08:04:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2024-11-16 08:04:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-16 08:04:19,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:04:19,918 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:04:19,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-16 08:04:20,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-16 08:04:20,119 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:04:20,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:04:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash -636365549, now seen corresponding path program 1 times [2024-11-16 08:04:20,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:04:20,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292230809] [2024-11-16 08:04:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:04:20,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:04:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 08:04:20,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870187105] [2024-11-16 08:04:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:04:20,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:04:20,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:04:20,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:04:20,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process