./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partition_ground-1.i --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/array-examples/standard_partition_ground-1.i -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 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 02:24:00,629 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 02:24:00,690 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 02:24:00,699 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 02:24:00,701 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 02:24:00,726 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 02:24:00,728 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 02:24:00,728 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 02:24:00,729 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 02:24:00,732 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 02:24:00,733 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 02:24:00,733 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 02:24:00,733 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 02:24:00,734 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 02:24:00,734 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 02:24:00,734 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 02:24:00,735 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 02:24:00,735 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 02:24:00,738 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 02:24:00,738 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 02:24:00,738 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 02:24:00,739 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 02:24:00,739 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 02:24:00,740 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 02:24:00,740 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 02:24:00,740 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 02:24:00,740 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 02:24:00,741 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 02:24:00,741 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 02:24:00,741 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 02:24:00,741 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 02:24:00,742 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 02:24:00,742 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:24:00,742 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 02:24:00,742 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 02:24:00,743 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 02:24:00,743 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 02:24:00,743 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 02:24:00,743 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 02:24:00,744 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 02:24:00,744 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 02:24:00,746 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 02:24:00,746 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 [2024-11-16 02:24:01,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 02:24:01,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 02:24:01,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 02:24:01,058 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 02:24:01,058 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 02:24:01,059 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2024-11-16 02:24:02,491 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 02:24:02,693 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 02:24:02,697 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2024-11-16 02:24:02,707 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5df4764a/dfe934c23097415d948d8f0284123493/FLAG26b8695af [2024-11-16 02:24:02,724 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5df4764a/dfe934c23097415d948d8f0284123493 [2024-11-16 02:24:02,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 02:24:02,729 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 02:24:02,732 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 02:24:02,732 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 02:24:02,737 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 02:24:02,738 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:24:02" (1/1) ... [2024-11-16 02:24:02,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62f6176b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:02, skipping insertion in model container [2024-11-16 02:24:02,739 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:24:02" (1/1) ... [2024-11-16 02:24:02,759 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 02:24:02,957 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/array-examples/standard_partition_ground-1.i[860,873] [2024-11-16 02:24:02,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:24:02,984 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 02:24:02,995 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/array-examples/standard_partition_ground-1.i[860,873] [2024-11-16 02:24:03,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:24:03,018 INFO L204 MainTranslator]: Completed translation [2024-11-16 02:24:03,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03 WrapperNode [2024-11-16 02:24:03,018 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 02:24:03,019 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 02:24:03,020 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 02:24:03,020 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 02:24:03,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (1/1) ... [2024-11-16 02:24:03,032 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (1/1) ... [2024-11-16 02:24:03,051 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2024-11-16 02:24:03,051 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 02:24:03,052 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 02:24:03,052 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 02:24:03,052 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 02:24:03,061 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (1/1) ... [2024-11-16 02:24:03,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (1/1) ... [2024-11-16 02:24:03,063 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (1/1) ... [2024-11-16 02:24:03,077 INFO L175 MemorySlicer]: Split 11 memory accesses to 4 slices as follows [2, 2, 2, 5]. 45 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-11-16 02:24:03,078 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (1/1) ... [2024-11-16 02:24:03,078 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (1/1) ... [2024-11-16 02:24:03,084 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (1/1) ... [2024-11-16 02:24:03,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (1/1) ... [2024-11-16 02:24:03,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (1/1) ... [2024-11-16 02:24:03,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (1/1) ... [2024-11-16 02:24:03,090 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 02:24:03,091 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 02:24:03,091 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 02:24:03,091 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 02:24:03,092 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (1/1) ... [2024-11-16 02:24:03,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:24:03,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:24:03,121 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 02:24:03,123 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 02:24:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 02:24:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 02:24:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 02:24:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 02:24:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 02:24:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 02:24:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 02:24:03,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 02:24:03,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 02:24:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 02:24:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 02:24:03,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 02:24:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 02:24:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 02:24:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 02:24:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 02:24:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 02:24:03,166 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 02:24:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 02:24:03,252 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 02:24:03,258 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 02:24:03,435 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L16: call ULTIMATE.dealloc(main_~#aa~0#1.base, main_~#aa~0#1.offset);havoc main_~#aa~0#1.base, main_~#aa~0#1.offset;call ULTIMATE.dealloc(main_~#bb~0#1.base, main_~#bb~0#1.offset);havoc main_~#bb~0#1.base, main_~#bb~0#1.offset;call ULTIMATE.dealloc(main_~#cc~0#1.base, main_~#cc~0#1.offset);havoc main_~#cc~0#1.base, main_~#cc~0#1.offset; [2024-11-16 02:24:03,449 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-16 02:24:03,449 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 02:24:03,460 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 02:24:03,461 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 02:24:03,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:24:03 BoogieIcfgContainer [2024-11-16 02:24:03,461 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 02:24:03,463 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 02:24:03,463 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 02:24:03,468 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 02:24:03,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 02:24:02" (1/3) ... [2024-11-16 02:24:03,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4401665f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:24:03, skipping insertion in model container [2024-11-16 02:24:03,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:24:03" (2/3) ... [2024-11-16 02:24:03,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4401665f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:24:03, skipping insertion in model container [2024-11-16 02:24:03,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:24:03" (3/3) ... [2024-11-16 02:24:03,471 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2024-11-16 02:24:03,488 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 02:24:03,488 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 02:24:03,546 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 02:24:03,553 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;@281f611f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 02:24:03,553 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 02:24:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:24:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-16 02:24:03,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:24:03,563 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:24:03,563 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:24:03,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:24:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash 197964582, now seen corresponding path program 1 times [2024-11-16 02:24:03,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:24:03,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034300828] [2024-11-16 02:24:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:24:03,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:24:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:24:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:24:03,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:24:03,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034300828] [2024-11-16 02:24:03,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034300828] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:24:03,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:24:03,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 02:24:03,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032303673] [2024-11-16 02:24:03,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:24:03,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 02:24:03,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:24:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 02:24:03,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:24:03,765 INFO L87 Difference]: Start difference. First operand has 33 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:24:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:24:03,781 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2024-11-16 02:24:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 02:24:03,783 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-16 02:24:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:24:03,789 INFO L225 Difference]: With dead ends: 59 [2024-11-16 02:24:03,790 INFO L226 Difference]: Without dead ends: 28 [2024-11-16 02:24:03,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 02:24:03,794 INFO L432 NwaCegarLoop]: 38 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, 38 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 02:24:03,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:24:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-16 02:24:03,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-16 02:24:03,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:24:03,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-11-16 02:24:03,821 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2024-11-16 02:24:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:24:03,821 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-11-16 02:24:03,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:24:03,822 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-11-16 02:24:03,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-16 02:24:03,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:24:03,823 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:24:03,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 02:24:03,824 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:24:03,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:24:03,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1907012834, now seen corresponding path program 1 times [2024-11-16 02:24:03,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:24:03,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188313132] [2024-11-16 02:24:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:24:03,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:24:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:24:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:24:03,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:24:03,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188313132] [2024-11-16 02:24:03,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188313132] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:24:03,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:24:03,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 02:24:03,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743432659] [2024-11-16 02:24:03,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:24:03,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 02:24:03,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:24:03,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 02:24:03,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 02:24:03,924 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:24:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:24:03,962 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2024-11-16 02:24:03,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 02:24:03,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-16 02:24:03,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:24:03,963 INFO L225 Difference]: With dead ends: 58 [2024-11-16 02:24:03,963 INFO L226 Difference]: Without dead ends: 36 [2024-11-16 02:24:03,964 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 02:24:03,965 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:24:03,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 52 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:24:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-16 02:24:03,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2024-11-16 02:24:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:24:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-16 02:24:03,974 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2024-11-16 02:24:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:24:03,975 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-16 02:24:03,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:24:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-16 02:24:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-16 02:24:03,976 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:24:03,976 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:24:03,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 02:24:03,977 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:24:03,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:24:03,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1924736478, now seen corresponding path program 1 times [2024-11-16 02:24:03,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:24:03,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317847152] [2024-11-16 02:24:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:24:03,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:24:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:24:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:24:04,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:24:04,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317847152] [2024-11-16 02:24:04,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317847152] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:24:04,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084394701] [2024-11-16 02:24:04,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:24:04,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:24:04,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:24:04,141 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 02:24:04,143 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 02:24:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:24:04,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-16 02:24:04,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:24:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:24:04,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:24:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:24:04,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084394701] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:24:04,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:24:04,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-16 02:24:04,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65366556] [2024-11-16 02:24:04,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:24:04,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 02:24:04,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:24:04,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 02:24:04,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-16 02:24:04,331 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:24:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:24:04,399 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2024-11-16 02:24:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 02:24:04,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-16 02:24:04,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:24:04,401 INFO L225 Difference]: With dead ends: 80 [2024-11-16 02:24:04,401 INFO L226 Difference]: Without dead ends: 56 [2024-11-16 02:24:04,402 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-16 02:24:04,403 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:24:04,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 82 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:24:04,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-16 02:24:04,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-16 02:24:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 52 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:24:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2024-11-16 02:24:04,416 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 23 [2024-11-16 02:24:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:24:04,416 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2024-11-16 02:24:04,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:24:04,417 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2024-11-16 02:24:04,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-16 02:24:04,418 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:24:04,418 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:24:04,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 02:24:04,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:24:04,619 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:24:04,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:24:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1508551198, now seen corresponding path program 2 times [2024-11-16 02:24:04,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:24:04,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456456683] [2024-11-16 02:24:04,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:24:04,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:24:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:24:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-16 02:24:04,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:24:04,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456456683] [2024-11-16 02:24:04,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456456683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:24:04,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315166646] [2024-11-16 02:24:04,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:24:04,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:24:04,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:24:04,973 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 02:24:04,976 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 02:24:05,084 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:24:05,085 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:24:05,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 02:24:05,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:24:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-16 02:24:05,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:24:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-16 02:24:05,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315166646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:24:05,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:24:05,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-16 02:24:05,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317803437] [2024-11-16 02:24:05,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:24:05,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 02:24:05,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:24:05,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 02:24:05,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-16 02:24:05,247 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:24:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:24:05,387 INFO L93 Difference]: Finished difference Result 140 states and 183 transitions. [2024-11-16 02:24:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 02:24:05,389 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-16 02:24:05,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:24:05,390 INFO L225 Difference]: With dead ends: 140 [2024-11-16 02:24:05,390 INFO L226 Difference]: Without dead ends: 104 [2024-11-16 02:24:05,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-16 02:24:05,391 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 89 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:24:05,392 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 150 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:24:05,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-16 02:24:05,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-11-16 02:24:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.24) internal successors, (124), 100 states have internal predecessors, (124), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:24:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2024-11-16 02:24:05,410 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 47 [2024-11-16 02:24:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:24:05,411 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2024-11-16 02:24:05,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:24:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2024-11-16 02:24:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-16 02:24:05,413 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:24:05,414 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:24:05,427 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 02:24:05,617 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,SelfDestructingSolverStorable3 [2024-11-16 02:24:05,618 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:24:05,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:24:05,619 INFO L85 PathProgramCache]: Analyzing trace with hash 223771806, now seen corresponding path program 3 times [2024-11-16 02:24:05,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:24:05,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621011232] [2024-11-16 02:24:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:24:05,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:24:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:24:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-16 02:24:06,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:24:06,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621011232] [2024-11-16 02:24:06,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621011232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:24:06,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736216565] [2024-11-16 02:24:06,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:24:06,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:24:06,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:24:06,080 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 02:24:06,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 02:24:07,924 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-16 02:24:07,925 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:24:07,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-16 02:24:07,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:24:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 38 proven. 200 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-16 02:24:08,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:24:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-16 02:24:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736216565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:24:08,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:24:08,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 26 [2024-11-16 02:24:08,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144606854] [2024-11-16 02:24:08,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:24:08,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-16 02:24:08,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:24:08,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-16 02:24:08,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2024-11-16 02:24:08,309 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand has 26 states, 26 states have (on average 5.923076923076923) internal successors, (154), 26 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:24:08,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:24:08,559 INFO L93 Difference]: Finished difference Result 260 states and 345 transitions. [2024-11-16 02:24:08,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-16 02:24:08,561 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.923076923076923) internal successors, (154), 26 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2024-11-16 02:24:08,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:24:08,564 INFO L225 Difference]: With dead ends: 260 [2024-11-16 02:24:08,564 INFO L226 Difference]: Without dead ends: 200 [2024-11-16 02:24:08,565 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2024-11-16 02:24:08,568 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 155 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:24:08,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 272 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:24:08,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-16 02:24:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2024-11-16 02:24:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 196 states have (on average 1.2448979591836735) internal successors, (244), 196 states have internal predecessors, (244), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:24:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2024-11-16 02:24:08,593 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 95 [2024-11-16 02:24:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:24:08,594 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2024-11-16 02:24:08,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.923076923076923) internal successors, (154), 26 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:24:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2024-11-16 02:24:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2024-11-16 02:24:08,602 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:24:08,602 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:24:08,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 02:24:08,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:24:08,803 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:24:08,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:24:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash -504542818, now seen corresponding path program 4 times [2024-11-16 02:24:08,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:24:08,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56215442] [2024-11-16 02:24:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:24:08,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:24:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:24:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2024-11-16 02:24:09,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:24:09,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56215442] [2024-11-16 02:24:09,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56215442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:24:09,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234997586] [2024-11-16 02:24:09,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:24:09,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:24:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:24:09,951 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:24:09,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 02:24:10,948 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:24:10,948 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:24:10,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-16 02:24:10,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:24:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2024-11-16 02:24:11,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:24:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2024-11-16 02:24:11,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234997586] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:24:11,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:24:11,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-16 02:24:11,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699200113] [2024-11-16 02:24:11,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:24:11,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-16 02:24:11,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:24:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-16 02:24:11,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-16 02:24:11,936 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand has 49 states, 49 states have (on average 4.1020408163265305) internal successors, (201), 49 states have internal predecessors, (201), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:24:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:24:12,589 INFO L93 Difference]: Finished difference Result 500 states and 669 transitions. [2024-11-16 02:24:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-16 02:24:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.1020408163265305) internal successors, (201), 49 states have internal predecessors, (201), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2024-11-16 02:24:12,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:24:12,593 INFO L225 Difference]: With dead ends: 500 [2024-11-16 02:24:12,594 INFO L226 Difference]: Without dead ends: 392 [2024-11-16 02:24:12,596 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-16 02:24:12,599 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 939 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:24:12,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 274 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:24:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2024-11-16 02:24:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2024-11-16 02:24:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 388 states have (on average 1.2474226804123711) internal successors, (484), 388 states have internal predecessors, (484), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 02:24:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 488 transitions. [2024-11-16 02:24:12,624 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 488 transitions. Word has length 191 [2024-11-16 02:24:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:24:12,625 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 488 transitions. [2024-11-16 02:24:12,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.1020408163265305) internal successors, (201), 49 states have internal predecessors, (201), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:24:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 488 transitions. [2024-11-16 02:24:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2024-11-16 02:24:12,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:24:12,631 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:24:12,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 02:24:12,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:24:12,832 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:24:12,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:24:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash -755530850, now seen corresponding path program 5 times [2024-11-16 02:24:12,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:24:12,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987009647] [2024-11-16 02:24:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:24:12,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:24:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:24:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2024-11-16 02:24:16,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:24:16,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987009647] [2024-11-16 02:24:16,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987009647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:24:16,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871403111] [2024-11-16 02:24:16,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:24:16,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:24:16,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:24:16,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:24:16,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process