./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/data_structures_set_multi_proc_ground-2.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 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:18:32,636 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:18:32,690 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:18:32,693 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:18:32,694 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:18:32,713 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:18:32,714 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:18:32,714 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:18:32,715 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:18:32,715 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:18:32,715 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:18:32,715 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:18:32,716 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:18:32,716 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:18:32,716 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:18:32,716 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:18:32,716 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:18:32,716 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:18:32,717 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:18:32,717 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:18:32,717 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:18:32,717 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:18:32,717 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:18:32,717 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:18:32,717 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:18:32,717 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:18:32,717 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:18:32,717 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:18:32,718 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:18:32,718 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:18:32,718 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 [2025-03-16 13:18:32,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:18:32,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:18:32,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:18:32,957 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:18:32,957 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:18:32,958 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2025-03-16 13:18:34,110 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85222a8f8/67084272146b45cd841ed22c5bc59aa2/FLAG2e3afa595 [2025-03-16 13:18:34,373 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:18:34,374 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2025-03-16 13:18:34,383 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85222a8f8/67084272146b45cd841ed22c5bc59aa2/FLAG2e3afa595 [2025-03-16 13:18:34,681 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85222a8f8/67084272146b45cd841ed22c5bc59aa2 [2025-03-16 13:18:34,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:18:34,684 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:18:34,685 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:18:34,685 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:18:34,687 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:18:34,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@505924de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34, skipping insertion in model container [2025-03-16 13:18:34,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,700 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:18:34,800 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/data_structures_set_multi_proc_ground-2.i[832,845] [2025-03-16 13:18:34,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:18:34,832 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:18:34,840 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/data_structures_set_multi_proc_ground-2.i[832,845] [2025-03-16 13:18:34,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:18:34,863 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:18:34,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34 WrapperNode [2025-03-16 13:18:34,864 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:18:34,865 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:18:34,865 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:18:34,865 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:18:34,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,874 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,891 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 114 [2025-03-16 13:18:34,891 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:18:34,892 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:18:34,892 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:18:34,892 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:18:34,898 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,904 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,919 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 3, 7]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 1, 2]. [2025-03-16 13:18:34,919 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,919 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,926 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,931 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,933 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:18:34,937 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:18:34,938 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:18:34,938 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:18:34,939 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:18:34,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:34,967 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) [2025-03-16 13:18:34,970 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 [2025-03-16 13:18:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:18:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:18:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:18:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 13:18:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:18:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:18:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:18:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 13:18:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:18:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:18:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:18:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:18:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 13:18:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 13:18:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 13:18:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:18:35,056 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:18:35,058 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:18:35,237 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L29: call ULTIMATE.dealloc(main_~#set~0#1.base, main_~#set~0#1.offset);havoc main_~#set~0#1.base, main_~#set~0#1.offset;call ULTIMATE.dealloc(main_~#values~0#1.base, main_~#values~0#1.offset);havoc main_~#values~0#1.base, main_~#values~0#1.offset; [2025-03-16 13:18:35,261 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2025-03-16 13:18:35,261 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:18:35,270 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:18:35,271 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:18:35,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:18:35 BoogieIcfgContainer [2025-03-16 13:18:35,272 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:18:35,274 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:18:35,274 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:18:35,277 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:18:35,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:18:34" (1/3) ... [2025-03-16 13:18:35,278 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5966f645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:18:35, skipping insertion in model container [2025-03-16 13:18:35,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (2/3) ... [2025-03-16 13:18:35,278 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5966f645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:18:35, skipping insertion in model container [2025-03-16 13:18:35,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:18:35" (3/3) ... [2025-03-16 13:18:35,280 INFO L128 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2025-03-16 13:18:35,291 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:18:35,293 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG data_structures_set_multi_proc_ground-2.i that has 2 procedures, 26 locations, 1 initial locations, 8 loop locations, and 1 error locations. [2025-03-16 13:18:35,340 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:18:35,348 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;@4a4609da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:18:35,348 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:18:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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) [2025-03-16 13:18:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-16 13:18:35,356 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:35,356 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:35,357 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:35,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:35,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1794468903, now seen corresponding path program 1 times [2025-03-16 13:18:35,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:35,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538887662] [2025-03-16 13:18:35,370 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:35,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:35,422 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 13:18:35,436 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 13:18:35,436 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:35,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:18:35,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:35,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538887662] [2025-03-16 13:18:35,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538887662] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:18:35,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:18:35,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:18:35,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342540406] [2025-03-16 13:18:35,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:18:35,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:18:35,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:35,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:18:35,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:18:35,531 INFO L87 Difference]: Start difference. First operand has 26 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2025-03-16 13:18:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:35,584 INFO L93 Difference]: Finished difference Result 59 states and 91 transitions. [2025-03-16 13:18:35,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:18:35,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2025-03-16 13:18:35,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:35,590 INFO L225 Difference]: With dead ends: 59 [2025-03-16 13:18:35,590 INFO L226 Difference]: Without dead ends: 32 [2025-03-16 13:18:35,592 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:18:35,593 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:35,594 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 50 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-16 13:18:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2025-03-16 13:18:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.5) internal successors, (30), 20 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) [2025-03-16 13:18:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2025-03-16 13:18:35,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 8 [2025-03-16 13:18:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:35,618 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2025-03-16 13:18:35,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2025-03-16 13:18:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2025-03-16 13:18:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 13:18:35,618 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:35,619 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:35,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:18:35,619 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:35,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:35,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1442793415, now seen corresponding path program 1 times [2025-03-16 13:18:35,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:35,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604195305] [2025-03-16 13:18:35,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:35,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:35,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 13:18:35,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 13:18:35,644 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:35,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:18:35,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:35,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604195305] [2025-03-16 13:18:35,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604195305] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:35,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723989532] [2025-03-16 13:18:35,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:35,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:35,702 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) [2025-03-16 13:18:35,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:18:35,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 13:18:35,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 13:18:35,768 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:35,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:35,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 13:18:35,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:18:35,791 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:18:35,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723989532] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:35,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:35,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-03-16 13:18:35,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055859178] [2025-03-16 13:18:35,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:35,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 13:18:35,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:35,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 13:18:35,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:18:35,810 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2025-03-16 13:18:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:35,889 INFO L93 Difference]: Finished difference Result 80 states and 122 transitions. [2025-03-16 13:18:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:18:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 9 [2025-03-16 13:18:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:35,892 INFO L225 Difference]: With dead ends: 80 [2025-03-16 13:18:35,892 INFO L226 Difference]: Without dead ends: 59 [2025-03-16 13:18:35,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:18:35,893 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:35,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 99 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:18:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-16 13:18:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 27. [2025-03-16 13:18:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 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) [2025-03-16 13:18:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2025-03-16 13:18:35,902 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 9 [2025-03-16 13:18:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:35,902 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2025-03-16 13:18:35,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2025-03-16 13:18:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2025-03-16 13:18:35,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 13:18:35,903 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:35,903 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:35,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 13:18:36,104 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 [2025-03-16 13:18:36,104 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:36,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:36,105 INFO L85 PathProgramCache]: Analyzing trace with hash 866167769, now seen corresponding path program 2 times [2025-03-16 13:18:36,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:36,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163281213] [2025-03-16 13:18:36,105 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:18:36,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:36,114 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-16 13:18:36,117 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 12 statements. [2025-03-16 13:18:36,117 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-16 13:18:36,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:18:36,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:36,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163281213] [2025-03-16 13:18:36,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163281213] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:18:36,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:18:36,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 13:18:36,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148385451] [2025-03-16 13:18:36,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:18:36,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:18:36,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:36,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:18:36,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:18:36,158 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2025-03-16 13:18:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:36,202 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2025-03-16 13:18:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:18:36,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2025-03-16 13:18:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:36,204 INFO L225 Difference]: With dead ends: 52 [2025-03-16 13:18:36,204 INFO L226 Difference]: Without dead ends: 30 [2025-03-16 13:18:36,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:18:36,205 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:36,205 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 49 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:36,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-16 13:18:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-03-16 13:18:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 13:18:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2025-03-16 13:18:36,208 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 12 [2025-03-16 13:18:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:36,208 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2025-03-16 13:18:36,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2025-03-16 13:18:36,208 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2025-03-16 13:18:36,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-16 13:18:36,209 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:36,209 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:36,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 13:18:36,209 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:36,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:36,209 INFO L85 PathProgramCache]: Analyzing trace with hash -137600881, now seen corresponding path program 1 times [2025-03-16 13:18:36,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:36,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919179366] [2025-03-16 13:18:36,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:36,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:36,226 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-16 13:18:36,238 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-16 13:18:36,238 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:36,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 13:18:36,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:36,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919179366] [2025-03-16 13:18:36,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919179366] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:18:36,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:18:36,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 13:18:36,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634096323] [2025-03-16 13:18:36,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:18:36,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:18:36,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:36,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:18:36,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:18:36,300 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2025-03-16 13:18:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:36,327 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2025-03-16 13:18:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:18:36,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 20 [2025-03-16 13:18:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:36,328 INFO L225 Difference]: With dead ends: 60 [2025-03-16 13:18:36,329 INFO L226 Difference]: Without dead ends: 38 [2025-03-16 13:18:36,329 INFO L434 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 [2025-03-16 13:18:36,329 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:36,329 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-16 13:18:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2025-03-16 13:18:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 13:18:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2025-03-16 13:18:36,333 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 20 [2025-03-16 13:18:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:36,333 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2025-03-16 13:18:36,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2025-03-16 13:18:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2025-03-16 13:18:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-16 13:18:36,334 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:36,334 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:36,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-16 13:18:36,334 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:36,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:36,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1262145515, now seen corresponding path program 1 times [2025-03-16 13:18:36,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:36,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936674473] [2025-03-16 13:18:36,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:36,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:36,349 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-16 13:18:36,372 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 13:18:36,372 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:36,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 13:18:36,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:36,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936674473] [2025-03-16 13:18:36,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936674473] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:36,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331140411] [2025-03-16 13:18:36,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:36,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:36,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:36,446 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) [2025-03-16 13:18:36,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:18:36,494 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-16 13:18:36,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 13:18:36,515 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:36,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:36,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:18:36,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:18:36,551 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:18:36,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331140411] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:36,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:36,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2025-03-16 13:18:36,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4102381] [2025-03-16 13:18:36,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:36,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:18:36,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:36,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:18:36,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:18:36,615 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 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) [2025-03-16 13:18:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:36,724 INFO L93 Difference]: Finished difference Result 122 states and 178 transitions. [2025-03-16 13:18:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:18:36,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 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 21 [2025-03-16 13:18:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:36,726 INFO L225 Difference]: With dead ends: 122 [2025-03-16 13:18:36,726 INFO L226 Difference]: Without dead ends: 97 [2025-03-16 13:18:36,726 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:18:36,727 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:36,727 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 89 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:18:36,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-03-16 13:18:36,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 45. [2025-03-16 13:18:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 13:18:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2025-03-16 13:18:36,736 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 21 [2025-03-16 13:18:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:36,737 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2025-03-16 13:18:36,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 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) [2025-03-16 13:18:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2025-03-16 13:18:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 13:18:36,737 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:36,737 INFO L218 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:36,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 13:18:36,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:36,942 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:36,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash 807816200, now seen corresponding path program 2 times [2025-03-16 13:18:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:36,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126560543] [2025-03-16 13:18:36,943 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:18:36,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:36,961 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-03-16 13:18:36,983 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:18:36,983 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:18:36,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:18:37,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:37,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126560543] [2025-03-16 13:18:37,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126560543] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:37,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939638601] [2025-03-16 13:18:37,170 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:18:37,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:37,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:37,172 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) [2025-03-16 13:18:37,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:18:37,221 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-03-16 13:18:37,248 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:18:37,248 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:18:37,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:37,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:18:37,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:18:37,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:18:37,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939638601] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:37,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:37,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-16 13:18:37,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823208937] [2025-03-16 13:18:37,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:37,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:18:37,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:37,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:18:37,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:18:37,492 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 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) [2025-03-16 13:18:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:37,679 INFO L93 Difference]: Finished difference Result 178 states and 259 transitions. [2025-03-16 13:18:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 13:18:37,680 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 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 33 [2025-03-16 13:18:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:37,681 INFO L225 Difference]: With dead ends: 178 [2025-03-16 13:18:37,681 INFO L226 Difference]: Without dead ends: 145 [2025-03-16 13:18:37,682 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:18:37,682 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 195 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:37,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 88 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:18:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2025-03-16 13:18:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 57. [2025-03-16 13:18:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 13:18:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2025-03-16 13:18:37,692 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 33 [2025-03-16 13:18:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:37,692 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2025-03-16 13:18:37,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 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) [2025-03-16 13:18:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2025-03-16 13:18:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 13:18:37,693 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:37,695 INFO L218 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:37,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 13:18:37,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:37,896 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:37,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:37,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1307116552, now seen corresponding path program 3 times [2025-03-16 13:18:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:37,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454711755] [2025-03-16 13:18:37,897 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:18:37,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:37,916 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 12 equivalence classes. [2025-03-16 13:18:37,924 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 45 statements. [2025-03-16 13:18:37,925 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 13:18:37,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2025-03-16 13:18:37,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:37,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454711755] [2025-03-16 13:18:37,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454711755] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:37,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196079710] [2025-03-16 13:18:37,964 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:18:37,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:37,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:37,966 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) [2025-03-16 13:18:37,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:18:38,043 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 12 equivalence classes. [2025-03-16 13:18:38,058 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 45 statements. [2025-03-16 13:18:38,059 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 13:18:38,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:38,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 13:18:38,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2025-03-16 13:18:38,076 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2025-03-16 13:18:38,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196079710] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:38,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:38,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-03-16 13:18:38,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262797514] [2025-03-16 13:18:38,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:38,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 13:18:38,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:38,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 13:18:38,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-16 13:18:38,099 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2025-03-16 13:18:38,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:38,142 INFO L93 Difference]: Finished difference Result 140 states and 196 transitions. [2025-03-16 13:18:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 13:18:38,142 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 45 [2025-03-16 13:18:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:38,144 INFO L225 Difference]: With dead ends: 140 [2025-03-16 13:18:38,144 INFO L226 Difference]: Without dead ends: 111 [2025-03-16 13:18:38,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-16 13:18:38,147 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 88 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:38,148 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 79 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-03-16 13:18:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2025-03-16 13:18:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 106 states have (on average 1.3584905660377358) internal successors, (144), 106 states have internal predecessors, (144), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 13:18:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2025-03-16 13:18:38,161 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 45 [2025-03-16 13:18:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:38,161 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2025-03-16 13:18:38,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2025-03-16 13:18:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2025-03-16 13:18:38,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-16 13:18:38,162 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:38,162 INFO L218 NwaCegarLoop]: trace histogram [22, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:38,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 13:18:38,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:38,366 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:38,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:38,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1429214664, now seen corresponding path program 4 times [2025-03-16 13:18:38,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:38,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070261318] [2025-03-16 13:18:38,367 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:18:38,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:38,393 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 69 statements into 2 equivalence classes. [2025-03-16 13:18:38,410 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 13:18:38,410 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:18:38,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2025-03-16 13:18:38,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:38,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070261318] [2025-03-16 13:18:38,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070261318] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:38,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457437848] [2025-03-16 13:18:38,569 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:18:38,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:38,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:38,571 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) [2025-03-16 13:18:38,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:18:38,647 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 69 statements into 2 equivalence classes. [2025-03-16 13:18:38,697 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 13:18:38,697 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:18:38,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:38,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:18:38,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2025-03-16 13:18:38,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2025-03-16 13:18:38,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457437848] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:38,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:38,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-16 13:18:38,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485633683] [2025-03-16 13:18:38,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:38,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 13:18:38,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:38,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 13:18:38,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:18:38,855 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 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) [2025-03-16 13:18:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:38,951 INFO L93 Difference]: Finished difference Result 292 states and 428 transitions. [2025-03-16 13:18:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:18:38,951 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 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 69 [2025-03-16 13:18:38,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:38,952 INFO L225 Difference]: With dead ends: 292 [2025-03-16 13:18:38,952 INFO L226 Difference]: Without dead ends: 215 [2025-03-16 13:18:38,953 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:18:38,953 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 120 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:38,953 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 166 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:18:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2025-03-16 13:18:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2025-03-16 13:18:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 210 states have (on average 1.4095238095238096) internal successors, (296), 210 states have internal predecessors, (296), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 13:18:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 298 transitions. [2025-03-16 13:18:38,973 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 298 transitions. Word has length 69 [2025-03-16 13:18:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:38,973 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 298 transitions. [2025-03-16 13:18:38,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 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) [2025-03-16 13:18:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 298 transitions. [2025-03-16 13:18:38,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-03-16 13:18:38,978 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:38,979 INFO L218 NwaCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:38,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 13:18:39,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:39,179 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:39,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:39,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1774315192, now seen corresponding path program 5 times [2025-03-16 13:18:39,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:39,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695379407] [2025-03-16 13:18:39,181 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:18:39,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:39,211 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 117 statements into 15 equivalence classes. [2025-03-16 13:18:39,385 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 117 of 117 statements. [2025-03-16 13:18:39,385 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-16 13:18:39,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2025-03-16 13:18:39,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:39,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695379407] [2025-03-16 13:18:39,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695379407] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:39,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637712922] [2025-03-16 13:18:39,836 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:18:39,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:39,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:39,838 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:18:39,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:18:39,958 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 117 statements into 15 equivalence classes.