./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s4lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/s4lif.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b9b6be32708c9c869a7ef906994ed167b62b1be5ed541f61924ceda8b83e642a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 02:57:05,983 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 02:57:06,056 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 02:57:06,061 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 02:57:06,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 02:57:06,086 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 02:57:06,087 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 02:57:06,087 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 02:57:06,088 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 02:57:06,088 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 02:57:06,089 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 02:57:06,089 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 02:57:06,090 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 02:57:06,090 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 02:57:06,091 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 02:57:06,091 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 02:57:06,091 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 02:57:06,092 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 02:57:06,092 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 02:57:06,092 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 02:57:06,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 02:57:06,094 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 02:57:06,095 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 02:57:06,098 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 02:57:06,098 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 02:57:06,098 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 02:57:06,098 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 02:57:06,099 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 02:57:06,099 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 02:57:06,099 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 02:57:06,099 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 02:57:06,100 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 02:57:06,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:57:06,100 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 02:57:06,101 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 02:57:06,101 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 02:57:06,106 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 02:57:06,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 02:57:06,106 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 02:57:06,106 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 02:57:06,107 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 02:57:06,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 02:57:06,108 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9b6be32708c9c869a7ef906994ed167b62b1be5ed541f61924ceda8b83e642a [2024-11-16 02:57:06,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 02:57:06,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 02:57:06,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 02:57:06,393 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 02:57:06,393 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 02:57:06,394 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s4lif.c [2024-11-16 02:57:07,921 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 02:57:08,142 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 02:57:08,143 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4lif.c [2024-11-16 02:57:08,152 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c09ba7bbd/08cbc0abb560431795f462c213156937/FLAG072afe38c [2024-11-16 02:57:08,170 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c09ba7bbd/08cbc0abb560431795f462c213156937 [2024-11-16 02:57:08,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 02:57:08,176 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 02:57:08,177 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 02:57:08,178 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 02:57:08,183 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 02:57:08,184 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,185 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a00a455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08, skipping insertion in model container [2024-11-16 02:57:08,185 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,205 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 02:57:08,399 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-fpi/s4lif.c[588,601] [2024-11-16 02:57:08,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:57:08,423 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 02:57:08,433 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-fpi/s4lif.c[588,601] [2024-11-16 02:57:08,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:57:08,458 INFO L204 MainTranslator]: Completed translation [2024-11-16 02:57:08,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08 WrapperNode [2024-11-16 02:57:08,458 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 02:57:08,459 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 02:57:08,460 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 02:57:08,460 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 02:57:08,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,473 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,491 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 86 [2024-11-16 02:57:08,491 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 02:57:08,492 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 02:57:08,492 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 02:57:08,492 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 02:57:08,501 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,503 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,513 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 7, 4]. 38 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 5 writes are split as follows [0, 0, 3, 2]. [2024-11-16 02:57:08,514 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,514 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,520 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,520 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,521 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,522 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,524 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 02:57:08,525 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 02:57:08,525 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 02:57:08,525 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 02:57:08,526 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (1/1) ... [2024-11-16 02:57:08,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:57:08,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:08,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 02:57:08,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 02:57:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 02:57:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 02:57:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 02:57:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 02:57:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 02:57:08,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 02:57:08,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 02:57:08,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 02:57:08,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 02:57:08,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 02:57:08,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 02:57:08,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 02:57:08,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 02:57:08,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 02:57:08,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 02:57:08,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 02:57:08,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 02:57:08,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 02:57:08,717 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 02:57:08,720 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 02:57:08,894 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L28: call ULTIMATE.dealloc(main_~#sum~0#1.base, main_~#sum~0#1.offset);havoc main_~#sum~0#1.base, main_~#sum~0#1.offset; [2024-11-16 02:57:08,905 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-16 02:57:08,905 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 02:57:08,924 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 02:57:08,924 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 02:57:08,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:57:08 BoogieIcfgContainer [2024-11-16 02:57:08,926 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 02:57:08,930 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 02:57:08,930 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 02:57:08,934 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 02:57:08,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 02:57:08" (1/3) ... [2024-11-16 02:57:08,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425363ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:57:08, skipping insertion in model container [2024-11-16 02:57:08,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:57:08" (2/3) ... [2024-11-16 02:57:08,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425363ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:57:08, skipping insertion in model container [2024-11-16 02:57:08,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:57:08" (3/3) ... [2024-11-16 02:57:08,938 INFO L112 eAbstractionObserver]: Analyzing ICFG s4lif.c [2024-11-16 02:57:08,969 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 02:57:08,970 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 02:57:09,042 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 02:57:09,051 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;@433f2da7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 02:57:09,052 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 02:57:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:09,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-16 02:57:09,067 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:09,067 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:09,068 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:09,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash 49340500, now seen corresponding path program 1 times [2024-11-16 02:57:09,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:09,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173783913] [2024-11-16 02:57:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:09,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:09,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:09,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173783913] [2024-11-16 02:57:09,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173783913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:57:09,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:57:09,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 02:57:09,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299823614] [2024-11-16 02:57:09,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:57:09,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 02:57:09,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:09,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 02:57:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:57:09,335 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:09,362 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2024-11-16 02:57:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 02:57:09,365 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-16 02:57:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:09,374 INFO L225 Difference]: With dead ends: 45 [2024-11-16 02:57:09,374 INFO L226 Difference]: Without dead ends: 20 [2024-11-16 02:57:09,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:57:09,380 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:09,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:57:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-16 02:57:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-16 02:57:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-16 02:57:09,415 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2024-11-16 02:57:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:09,416 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-16 02:57:09,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-16 02:57:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-16 02:57:09,417 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:09,417 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:09,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 02:57:09,418 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:09,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:09,418 INFO L85 PathProgramCache]: Analyzing trace with hash -986136489, now seen corresponding path program 1 times [2024-11-16 02:57:09,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:09,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965203267] [2024-11-16 02:57:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:09,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:09,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:09,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965203267] [2024-11-16 02:57:09,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965203267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:57:09,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:57:09,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 02:57:09,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073060447] [2024-11-16 02:57:09,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:57:09,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 02:57:09,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:09,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 02:57:09,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 02:57:09,662 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:09,735 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-11-16 02:57:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 02:57:09,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-16 02:57:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:09,737 INFO L225 Difference]: With dead ends: 41 [2024-11-16 02:57:09,737 INFO L226 Difference]: Without dead ends: 28 [2024-11-16 02:57:09,737 INFO L431 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 [2024-11-16 02:57:09,739 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:09,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:57:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-16 02:57:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-11-16 02:57:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-11-16 02:57:09,752 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2024-11-16 02:57:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:09,752 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-11-16 02:57:09,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-11-16 02:57:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-16 02:57:09,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:09,753 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:09,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 02:57:09,754 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:09,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:09,754 INFO L85 PathProgramCache]: Analyzing trace with hash 179359543, now seen corresponding path program 1 times [2024-11-16 02:57:09,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:09,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085195963] [2024-11-16 02:57:09,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:09,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:10,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085195963] [2024-11-16 02:57:10,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085195963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103959214] [2024-11-16 02:57:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:10,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:10,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:10,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 02:57:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:10,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-16 02:57:10,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:10,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:57:11,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:11,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:11,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:11,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-16 02:57:11,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:11,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2024-11-16 02:57:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:11,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103959214] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:11,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:11,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2024-11-16 02:57:11,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172797246] [2024-11-16 02:57:11,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:11,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-16 02:57:11,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:11,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-16 02:57:11,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2024-11-16 02:57:11,584 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:11,947 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2024-11-16 02:57:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 02:57:11,948 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-16 02:57:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:11,949 INFO L225 Difference]: With dead ends: 57 [2024-11-16 02:57:11,950 INFO L226 Difference]: Without dead ends: 52 [2024-11-16 02:57:11,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2024-11-16 02:57:11,953 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:11,955 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 104 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:57:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-16 02:57:11,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2024-11-16 02:57:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-11-16 02:57:11,969 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 25 [2024-11-16 02:57:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:11,969 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-11-16 02:57:11,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-11-16 02:57:11,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-16 02:57:11,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:11,971 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:11,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 02:57:12,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:12,176 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:12,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:12,176 INFO L85 PathProgramCache]: Analyzing trace with hash -114043464, now seen corresponding path program 1 times [2024-11-16 02:57:12,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:12,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013952530] [2024-11-16 02:57:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:12,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:57:12,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:12,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013952530] [2024-11-16 02:57:12,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013952530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:12,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662640524] [2024-11-16 02:57:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:12,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:12,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:12,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:12,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 02:57:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:12,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 02:57:12,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:12,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:57:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:57:12,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:12,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-16 02:57:12,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-16 02:57:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:57:12,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662640524] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:12,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:12,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-16 02:57:12,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700772314] [2024-11-16 02:57:12,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:12,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 02:57:12,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:12,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 02:57:12,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-16 02:57:12,523 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:12,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:12,580 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-16 02:57:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 02:57:12,581 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-16 02:57:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:12,582 INFO L225 Difference]: With dead ends: 58 [2024-11-16 02:57:12,583 INFO L226 Difference]: Without dead ends: 44 [2024-11-16 02:57:12,583 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-16 02:57:12,584 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:12,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 84 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:57:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-16 02:57:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2024-11-16 02:57:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2024-11-16 02:57:12,597 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2024-11-16 02:57:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:12,598 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2024-11-16 02:57:12,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2024-11-16 02:57:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-16 02:57:12,599 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:12,599 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:12,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 02:57:12,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-16 02:57:12,800 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:12,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:12,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1807199594, now seen corresponding path program 2 times [2024-11-16 02:57:12,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:12,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448326844] [2024-11-16 02:57:12,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:12,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:57:12,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:12,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448326844] [2024-11-16 02:57:12,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448326844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:12,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608008041] [2024-11-16 02:57:12,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:57:12,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:12,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:12,919 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:12,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 02:57:12,994 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:57:12,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:12,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 02:57:12,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:57:13,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:57:13,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608008041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:13,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:13,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-16 02:57:13,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529636592] [2024-11-16 02:57:13,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:13,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 02:57:13,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 02:57:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-16 02:57:13,110 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:13,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:13,206 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2024-11-16 02:57:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 02:57:13,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-16 02:57:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:13,209 INFO L225 Difference]: With dead ends: 79 [2024-11-16 02:57:13,209 INFO L226 Difference]: Without dead ends: 46 [2024-11-16 02:57:13,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-16 02:57:13,210 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:13,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 50 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:57:13,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-16 02:57:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2024-11-16 02:57:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-11-16 02:57:13,218 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2024-11-16 02:57:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:13,218 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-11-16 02:57:13,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:13,219 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-11-16 02:57:13,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-16 02:57:13,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:13,220 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:13,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 02:57:13,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:13,421 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:13,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:13,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1337522186, now seen corresponding path program 3 times [2024-11-16 02:57:13,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:13,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289180161] [2024-11-16 02:57:13,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:13,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:57:13,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:13,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289180161] [2024-11-16 02:57:13,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289180161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:13,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126431856] [2024-11-16 02:57:13,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:57:13,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:13,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:13,541 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:13,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 02:57:13,607 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 02:57:13,607 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:13,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-16 02:57:13,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:13,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:57:13,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:13,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:57:14,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:14,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-16 02:57:14,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:14,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2024-11-16 02:57:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:57:14,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126431856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:14,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:14,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 27 [2024-11-16 02:57:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479833937] [2024-11-16 02:57:14,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:14,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-16 02:57:14,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:14,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-16 02:57:14,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-11-16 02:57:14,455 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:14,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:14,869 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2024-11-16 02:57:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 02:57:14,870 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-16 02:57:14,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:14,870 INFO L225 Difference]: With dead ends: 44 [2024-11-16 02:57:14,871 INFO L226 Difference]: Without dead ends: 34 [2024-11-16 02:57:14,871 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2024-11-16 02:57:14,872 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 84 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:14,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 124 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:57:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-16 02:57:14,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-16 02:57:14,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:14,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2024-11-16 02:57:14,881 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2024-11-16 02:57:14,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:14,881 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2024-11-16 02:57:14,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:14,881 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2024-11-16 02:57:14,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-16 02:57:14,883 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:14,883 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:14,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 02:57:15,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:15,089 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:15,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:15,090 INFO L85 PathProgramCache]: Analyzing trace with hash -103385577, now seen corresponding path program 4 times [2024-11-16 02:57:15,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:15,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735964276] [2024-11-16 02:57:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:15,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:16,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:16,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735964276] [2024-11-16 02:57:16,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735964276] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:16,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108035463] [2024-11-16 02:57:16,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:57:16,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:16,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:16,050 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:16,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 02:57:16,126 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:57:16,127 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:16,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-16 02:57:16,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:16,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:57:16,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:16,489 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:16,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-16 02:57:16,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:16,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:16,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:17,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-11-16 02:57:17,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:17,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 386 treesize of output 383 [2024-11-16 02:57:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:17,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108035463] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:17,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:17,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 43 [2024-11-16 02:57:17,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487692956] [2024-11-16 02:57:17,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:17,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-16 02:57:17,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:17,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-16 02:57:17,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1539, Unknown=0, NotChecked=0, Total=1806 [2024-11-16 02:57:17,612 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:19,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:19,039 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2024-11-16 02:57:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-16 02:57:19,040 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-16 02:57:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:19,041 INFO L225 Difference]: With dead ends: 101 [2024-11-16 02:57:19,041 INFO L226 Difference]: Without dead ends: 83 [2024-11-16 02:57:19,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=687, Invalid=3473, Unknown=0, NotChecked=0, Total=4160 [2024-11-16 02:57:19,043 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 142 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:19,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 264 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:57:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-16 02:57:19,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2024-11-16 02:57:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2024-11-16 02:57:19,053 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 33 [2024-11-16 02:57:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:19,053 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2024-11-16 02:57:19,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2024-11-16 02:57:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-16 02:57:19,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:19,054 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:19,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 02:57:19,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:19,255 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:19,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:19,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1404166232, now seen corresponding path program 1 times [2024-11-16 02:57:19,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:19,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284738789] [2024-11-16 02:57:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:19,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:57:19,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284738789] [2024-11-16 02:57:19,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284738789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525626364] [2024-11-16 02:57:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:19,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:19,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:19,535 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) [2024-11-16 02:57:19,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 02:57:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:19,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-16 02:57:19,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:19,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:57:19,664 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:19,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2024-11-16 02:57:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:57:19,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:19,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-16 02:57:19,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-16 02:57:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:57:19,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525626364] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:19,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:19,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-16 02:57:19,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031412794] [2024-11-16 02:57:19,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:19,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:57:19,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:19,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:57:19,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:57:19,760 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:19,847 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2024-11-16 02:57:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 02:57:19,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-16 02:57:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:19,848 INFO L225 Difference]: With dead ends: 97 [2024-11-16 02:57:19,848 INFO L226 Difference]: Without dead ends: 66 [2024-11-16 02:57:19,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-16 02:57:19,849 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:19,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:57:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-16 02:57:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2024-11-16 02:57:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2024-11-16 02:57:19,858 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 33 [2024-11-16 02:57:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:19,858 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2024-11-16 02:57:19,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2024-11-16 02:57:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-16 02:57:19,859 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:19,859 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:19,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-16 02:57:20,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:20,064 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:20,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:20,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1352647030, now seen corresponding path program 5 times [2024-11-16 02:57:20,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:20,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497649601] [2024-11-16 02:57:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:20,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:57:20,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:20,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497649601] [2024-11-16 02:57:20,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497649601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:20,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450294864] [2024-11-16 02:57:20,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:57:20,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:20,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:20,193 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:20,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 02:57:20,279 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-16 02:57:20,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:20,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 02:57:20,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:57:20,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:57:20,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450294864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:20,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:20,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-16 02:57:20,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366448214] [2024-11-16 02:57:20,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:20,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:57:20,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:57:20,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:57:20,438 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:20,552 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2024-11-16 02:57:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 02:57:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-16 02:57:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:20,553 INFO L225 Difference]: With dead ends: 101 [2024-11-16 02:57:20,553 INFO L226 Difference]: Without dead ends: 56 [2024-11-16 02:57:20,553 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-16 02:57:20,555 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:20,555 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 70 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:57:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-16 02:57:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2024-11-16 02:57:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2024-11-16 02:57:20,565 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 35 [2024-11-16 02:57:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:20,565 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2024-11-16 02:57:20,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2024-11-16 02:57:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-16 02:57:20,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:20,566 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:20,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 02:57:20,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:20,767 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:20,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:20,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1086554070, now seen corresponding path program 6 times [2024-11-16 02:57:20,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:20,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411549681] [2024-11-16 02:57:20,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:20,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:57:20,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411549681] [2024-11-16 02:57:20,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411549681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151283697] [2024-11-16 02:57:20,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 02:57:20,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:20,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:20,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 02:57:20,967 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-16 02:57:20,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:20,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 02:57:20,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:57:21,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:57:21,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151283697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:21,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:21,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-16 02:57:21,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697729266] [2024-11-16 02:57:21,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:21,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:57:21,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:21,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:57:21,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:57:21,125 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:21,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:21,242 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2024-11-16 02:57:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 02:57:21,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-16 02:57:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:21,243 INFO L225 Difference]: With dead ends: 56 [2024-11-16 02:57:21,243 INFO L226 Difference]: Without dead ends: 44 [2024-11-16 02:57:21,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2024-11-16 02:57:21,244 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:21,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 88 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:57:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-16 02:57:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-16 02:57:21,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2024-11-16 02:57:21,251 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2024-11-16 02:57:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:21,252 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2024-11-16 02:57:21,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:21,252 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2024-11-16 02:57:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-16 02:57:21,252 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:21,252 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:21,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 02:57:21,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-16 02:57:21,453 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:21,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash -538512137, now seen corresponding path program 7 times [2024-11-16 02:57:21,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:21,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071564993] [2024-11-16 02:57:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:21,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:23,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:23,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071564993] [2024-11-16 02:57:23,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071564993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:23,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870060971] [2024-11-16 02:57:23,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 02:57:23,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:23,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:23,108 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:23,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 02:57:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:23,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-16 02:57:23,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:23,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:57:23,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:23,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:23,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-16 02:57:23,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:23,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-16 02:57:23,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:23,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:23,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:24,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:24,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2024-11-16 02:57:24,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:24,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 11885 treesize of output 11303 [2024-11-16 02:57:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:25,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870060971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:25,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:25,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 54 [2024-11-16 02:57:25,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038164409] [2024-11-16 02:57:25,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:25,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-16 02:57:25,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:25,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-16 02:57:25,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2516, Unknown=0, NotChecked=0, Total=2862 [2024-11-16 02:57:25,119 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 54 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:26,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:26,219 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2024-11-16 02:57:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-16 02:57:26,220 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-16 02:57:26,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:26,220 INFO L225 Difference]: With dead ends: 101 [2024-11-16 02:57:26,220 INFO L226 Difference]: Without dead ends: 76 [2024-11-16 02:57:26,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=540, Invalid=3492, Unknown=0, NotChecked=0, Total=4032 [2024-11-16 02:57:26,222 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:26,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 565 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 02:57:26,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-16 02:57:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 56. [2024-11-16 02:57:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 55 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2024-11-16 02:57:26,241 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2024-11-16 02:57:26,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:26,241 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2024-11-16 02:57:26,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2024-11-16 02:57:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-16 02:57:26,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:26,242 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:26,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 02:57:26,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:26,443 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:26,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:26,443 INFO L85 PathProgramCache]: Analyzing trace with hash 814797560, now seen corresponding path program 2 times [2024-11-16 02:57:26,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:26,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453285548] [2024-11-16 02:57:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:26,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:57:26,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:26,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453285548] [2024-11-16 02:57:26,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453285548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:26,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278072064] [2024-11-16 02:57:26,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:57:26,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:26,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:26,794 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:26,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 02:57:26,881 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:57:26,881 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:26,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-16 02:57:26,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:26,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:57:26,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:26,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2024-11-16 02:57:26,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:26,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2024-11-16 02:57:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:57:27,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:27,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-16 02:57:27,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-16 02:57:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:57:27,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278072064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:27,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:27,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-11-16 02:57:27,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746239467] [2024-11-16 02:57:27,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:27,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 02:57:27,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:27,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 02:57:27,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-11-16 02:57:27,124 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:27,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:27,285 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2024-11-16 02:57:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 02:57:27,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-16 02:57:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:27,286 INFO L225 Difference]: With dead ends: 81 [2024-11-16 02:57:27,286 INFO L226 Difference]: Without dead ends: 63 [2024-11-16 02:57:27,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-11-16 02:57:27,287 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:27,287 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 242 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:57:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-16 02:57:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2024-11-16 02:57:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1) internal successors, (66), 60 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2024-11-16 02:57:27,303 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 41 [2024-11-16 02:57:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:27,303 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2024-11-16 02:57:27,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2024-11-16 02:57:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-16 02:57:27,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:27,305 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:27,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-16 02:57:27,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-16 02:57:27,510 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:27,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:27,510 INFO L85 PathProgramCache]: Analyzing trace with hash -255209546, now seen corresponding path program 8 times [2024-11-16 02:57:27,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:27,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231201157] [2024-11-16 02:57:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:27,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:57:27,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:27,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231201157] [2024-11-16 02:57:27,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231201157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:27,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804240194] [2024-11-16 02:57:27,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:57:27,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:27,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:27,643 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:27,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 02:57:27,741 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:57:27,741 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:27,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 02:57:27,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:57:27,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:57:27,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804240194] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:27,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:27,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-16 02:57:27,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752506117] [2024-11-16 02:57:27,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:27,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 02:57:27,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:27,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 02:57:27,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-16 02:57:27,932 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:28,146 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2024-11-16 02:57:28,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 02:57:28,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-16 02:57:28,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:28,149 INFO L225 Difference]: With dead ends: 85 [2024-11-16 02:57:28,149 INFO L226 Difference]: Without dead ends: 71 [2024-11-16 02:57:28,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2024-11-16 02:57:28,150 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:28,150 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 124 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:57:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-16 02:57:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2024-11-16 02:57:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 65 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2024-11-16 02:57:28,168 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 43 [2024-11-16 02:57:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:28,169 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2024-11-16 02:57:28,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2024-11-16 02:57:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-16 02:57:28,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:28,169 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:28,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-16 02:57:28,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-16 02:57:28,370 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:28,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:28,371 INFO L85 PathProgramCache]: Analyzing trace with hash -181641703, now seen corresponding path program 3 times [2024-11-16 02:57:28,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:28,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098856457] [2024-11-16 02:57:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:28,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:57:28,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:28,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098856457] [2024-11-16 02:57:28,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098856457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:28,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037007710] [2024-11-16 02:57:28,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:57:28,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:28,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:28,512 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:28,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 02:57:28,628 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-16 02:57:28,629 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:28,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 02:57:28,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:57:28,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:57:28,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037007710] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:28,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:28,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-16 02:57:28,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228033686] [2024-11-16 02:57:28,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:28,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 02:57:28,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 02:57:28,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-16 02:57:28,792 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:28,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:28,900 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2024-11-16 02:57:28,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 02:57:28,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-16 02:57:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:28,901 INFO L225 Difference]: With dead ends: 91 [2024-11-16 02:57:28,901 INFO L226 Difference]: Without dead ends: 52 [2024-11-16 02:57:28,901 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-16 02:57:28,902 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:28,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 84 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:57:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-16 02:57:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2024-11-16 02:57:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2024-11-16 02:57:28,909 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 47 [2024-11-16 02:57:28,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:28,910 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2024-11-16 02:57:28,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2024-11-16 02:57:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-16 02:57:28,911 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:28,911 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:28,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-16 02:57:29,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-16 02:57:29,115 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:29,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:29,116 INFO L85 PathProgramCache]: Analyzing trace with hash 220171223, now seen corresponding path program 9 times [2024-11-16 02:57:29,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:29,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53387336] [2024-11-16 02:57:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:29,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:30,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:30,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53387336] [2024-11-16 02:57:30,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53387336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:30,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148153363] [2024-11-16 02:57:30,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:57:30,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:30,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:30,998 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:31,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 02:57:31,119 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-16 02:57:31,119 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:31,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-16 02:57:31,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:31,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:57:31,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:31,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:31,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-16 02:57:31,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:31,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-16 02:57:31,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:31,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-16 02:57:32,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:32,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:32,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-11-16 02:57:32,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:32,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:32,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 95 [2024-11-16 02:57:32,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 81 [2024-11-16 02:57:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:57:32,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:33,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 126 [2024-11-16 02:57:33,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:33,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 5862 treesize of output 5813 [2024-11-16 02:57:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:57:33,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148153363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:33,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:33,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 24] total 69 [2024-11-16 02:57:33,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073570989] [2024-11-16 02:57:33,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:33,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-16 02:57:33,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:33,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-16 02:57:33,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=4336, Unknown=0, NotChecked=0, Total=4692 [2024-11-16 02:57:33,945 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 69 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 69 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:36,836 INFO L93 Difference]: Finished difference Result 131 states and 150 transitions. [2024-11-16 02:57:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-16 02:57:36,837 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 69 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-16 02:57:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:36,837 INFO L225 Difference]: With dead ends: 131 [2024-11-16 02:57:36,837 INFO L226 Difference]: Without dead ends: 125 [2024-11-16 02:57:36,842 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3234 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1187, Invalid=11023, Unknown=0, NotChecked=0, Total=12210 [2024-11-16 02:57:36,843 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 198 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:36,843 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 798 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-16 02:57:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-16 02:57:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 89. [2024-11-16 02:57:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 88 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2024-11-16 02:57:36,858 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 49 [2024-11-16 02:57:36,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:36,858 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2024-11-16 02:57:36,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 69 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2024-11-16 02:57:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-16 02:57:36,859 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:36,859 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:36,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-16 02:57:37,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-16 02:57:37,060 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:37,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash -624300648, now seen corresponding path program 4 times [2024-11-16 02:57:37,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:37,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741710072] [2024-11-16 02:57:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:37,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:57:37,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:37,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741710072] [2024-11-16 02:57:37,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741710072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:37,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141623142] [2024-11-16 02:57:37,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:57:37,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:37,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:37,400 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:37,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 02:57:37,495 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:57:37,495 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:37,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-16 02:57:37,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:37,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-16 02:57:37,643 INFO L349 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2024-11-16 02:57:37,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2024-11-16 02:57:37,776 INFO L349 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2024-11-16 02:57:37,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 58 [2024-11-16 02:57:37,987 INFO L349 Elim1Store]: treesize reduction 91, result has 33.1 percent of original size [2024-11-16 02:57:37,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 73 treesize of output 86 [2024-11-16 02:57:38,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:38,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-11-16 02:57:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-16 02:57:38,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-16 02:57:38,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141623142] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:38,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:38,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 33 [2024-11-16 02:57:38,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364292079] [2024-11-16 02:57:38,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:38,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-16 02:57:38,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:38,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-16 02:57:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2024-11-16 02:57:38,625 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:39,543 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2024-11-16 02:57:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-16 02:57:39,544 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-16 02:57:39,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:39,545 INFO L225 Difference]: With dead ends: 139 [2024-11-16 02:57:39,545 INFO L226 Difference]: Without dead ends: 109 [2024-11-16 02:57:39,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=440, Invalid=2640, Unknown=0, NotChecked=0, Total=3080 [2024-11-16 02:57:39,546 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:39,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 376 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 02:57:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-16 02:57:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2024-11-16 02:57:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.103448275862069) internal successors, (96), 87 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2024-11-16 02:57:39,563 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 49 [2024-11-16 02:57:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:39,563 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2024-11-16 02:57:39,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2024-11-16 02:57:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-16 02:57:39,564 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:39,564 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:39,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-16 02:57:39,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:39,764 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:39,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:39,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1819547947, now seen corresponding path program 10 times [2024-11-16 02:57:39,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:39,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765700422] [2024-11-16 02:57:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:39,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-16 02:57:39,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:39,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765700422] [2024-11-16 02:57:39,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765700422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:39,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006887830] [2024-11-16 02:57:39,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:57:39,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:39,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:39,968 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:39,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-16 02:57:40,066 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:57:40,066 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:40,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-16 02:57:40,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-16 02:57:40,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-16 02:57:40,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006887830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:40,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:40,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2024-11-16 02:57:40,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157315401] [2024-11-16 02:57:40,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:40,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 02:57:40,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 02:57:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2024-11-16 02:57:40,271 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:40,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:40,397 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2024-11-16 02:57:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 02:57:40,397 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-16 02:57:40,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:40,398 INFO L225 Difference]: With dead ends: 129 [2024-11-16 02:57:40,398 INFO L226 Difference]: Without dead ends: 69 [2024-11-16 02:57:40,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2024-11-16 02:57:40,399 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:40,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 113 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:57:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-16 02:57:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 56. [2024-11-16 02:57:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2024-11-16 02:57:40,411 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 53 [2024-11-16 02:57:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:40,412 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2024-11-16 02:57:40,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2024-11-16 02:57:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-16 02:57:40,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:40,413 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:40,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-16 02:57:40,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-16 02:57:40,613 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:40,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:40,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1357089688, now seen corresponding path program 11 times [2024-11-16 02:57:40,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:40,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388834245] [2024-11-16 02:57:40,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:40,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-16 02:57:40,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:40,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388834245] [2024-11-16 02:57:40,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388834245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:40,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018265032] [2024-11-16 02:57:40,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:57:40,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:40,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:40,778 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:40,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-16 02:57:40,945 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-16 02:57:40,945 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:40,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-16 02:57:40,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 32 proven. 38 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 02:57:41,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 32 proven. 38 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 02:57:41,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018265032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:41,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:41,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-16 02:57:41,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442083421] [2024-11-16 02:57:41,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:41,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 02:57:41,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:41,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 02:57:41,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-16 02:57:41,170 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:41,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:57:41,310 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2024-11-16 02:57:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 02:57:41,310 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-16 02:57:41,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:57:41,311 INFO L225 Difference]: With dead ends: 69 [2024-11-16 02:57:41,311 INFO L226 Difference]: Without dead ends: 64 [2024-11-16 02:57:41,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 94 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2024-11-16 02:57:41,312 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 96 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:57:41,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 108 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:57:41,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-16 02:57:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2024-11-16 02:57:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2024-11-16 02:57:41,331 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 55 [2024-11-16 02:57:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:57:41,331 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2024-11-16 02:57:41,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:57:41,332 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2024-11-16 02:57:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-16 02:57:41,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:57:41,332 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:57:41,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-16 02:57:41,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-16 02:57:41,533 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:57:41,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:57:41,533 INFO L85 PathProgramCache]: Analyzing trace with hash 415070903, now seen corresponding path program 12 times [2024-11-16 02:57:41,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:57:41,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693882689] [2024-11-16 02:57:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:57:41,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:57:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:57:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:57:44,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:57:44,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693882689] [2024-11-16 02:57:44,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693882689] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:57:44,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192812038] [2024-11-16 02:57:44,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 02:57:44,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:57:44,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:57:44,114 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:57:44,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-16 02:57:44,260 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-16 02:57:44,260 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:57:44,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-16 02:57:44,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:57:44,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:57:44,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:44,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:44,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-16 02:57:44,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:44,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-16 02:57:45,067 INFO L349 Elim1Store]: treesize reduction 60, result has 36.2 percent of original size [2024-11-16 02:57:45,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 55 [2024-11-16 02:57:45,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:45,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:45,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:45,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:45,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:45,392 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2024-11-16 02:57:45,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 61 [2024-11-16 02:57:45,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:45,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:46,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:57:46,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-16 02:57:46,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-16 02:57:46,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:46,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:46,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:46,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:46,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:46,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:46,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:57:46,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:57:46,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 62 treesize of output 50 [2024-11-16 02:57:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:57:46,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:57:48,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 185 [2024-11-16 02:57:48,165 INFO L349 Elim1Store]: treesize reduction 72, result has 43.3 percent of original size [2024-11-16 02:57:48,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 9963 treesize of output 9349 [2024-11-16 02:57:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:57:48,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192812038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:57:48,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:57:48,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 29] total 85 [2024-11-16 02:57:48,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215028525] [2024-11-16 02:57:48,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:57:48,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-16 02:57:48,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:57:48,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-16 02:57:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=934, Invalid=6206, Unknown=0, NotChecked=0, Total=7140 [2024-11-16 02:57:48,462 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 85 states, 85 states have (on average 1.7529411764705882) internal successors, (149), 85 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:58:08,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:58:08,599 INFO L93 Difference]: Finished difference Result 326 states and 383 transitions. [2024-11-16 02:58:08,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2024-11-16 02:58:08,599 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.7529411764705882) internal successors, (149), 85 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-16 02:58:08,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:58:08,601 INFO L225 Difference]: With dead ends: 326 [2024-11-16 02:58:08,601 INFO L226 Difference]: Without dead ends: 305 [2024-11-16 02:58:08,606 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22636 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=7485, Invalid=55265, Unknown=0, NotChecked=0, Total=62750 [2024-11-16 02:58:08,606 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 620 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-16 02:58:08,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 902 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1650 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-16 02:58:08,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-16 02:58:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 214. [2024-11-16 02:58:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.2253521126760563) internal successors, (261), 213 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:58:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 261 transitions. [2024-11-16 02:58:08,655 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 261 transitions. Word has length 57 [2024-11-16 02:58:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:58:08,655 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 261 transitions. [2024-11-16 02:58:08,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.7529411764705882) internal successors, (149), 85 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:58:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 261 transitions. [2024-11-16 02:58:08,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-16 02:58:08,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:58:08,656 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:58:08,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-16 02:58:08,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:58:08,857 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:58:08,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:58:08,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1361615435, now seen corresponding path program 13 times [2024-11-16 02:58:08,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:58:08,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421286464] [2024-11-16 02:58:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:58:08,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:58:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:58:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 42 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-16 02:58:09,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:58:09,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421286464] [2024-11-16 02:58:09,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421286464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:58:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914903171] [2024-11-16 02:58:09,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 02:58:09,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:58:09,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:58:09,063 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:58:09,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-16 02:58:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:58:09,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 02:58:09,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:58:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 54 proven. 30 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-16 02:58:09,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:58:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 54 proven. 30 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-16 02:58:09,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914903171] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:58:09,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:58:09,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2024-11-16 02:58:09,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375856620] [2024-11-16 02:58:09,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:58:09,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-16 02:58:09,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:58:09,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-16 02:58:09,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2024-11-16 02:58:09,449 INFO L87 Difference]: Start difference. First operand 214 states and 261 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:58:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:58:09,660 INFO L93 Difference]: Finished difference Result 267 states and 315 transitions. [2024-11-16 02:58:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 02:58:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-16 02:58:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:58:09,661 INFO L225 Difference]: With dead ends: 267 [2024-11-16 02:58:09,661 INFO L226 Difference]: Without dead ends: 140 [2024-11-16 02:58:09,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 103 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2024-11-16 02:58:09,662 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 119 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:58:09,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 170 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:58:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-16 02:58:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 119. [2024-11-16 02:58:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 118 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:58:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2024-11-16 02:58:09,691 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 61 [2024-11-16 02:58:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:58:09,691 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2024-11-16 02:58:09,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:58:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2024-11-16 02:58:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-16 02:58:09,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:58:09,692 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:58:09,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-16 02:58:09,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:58:09,892 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:58:09,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:58:09,893 INFO L85 PathProgramCache]: Analyzing trace with hash 620626327, now seen corresponding path program 14 times [2024-11-16 02:58:09,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:58:09,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137627497] [2024-11-16 02:58:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:58:09,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:58:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:58:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:58:13,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:58:13,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137627497] [2024-11-16 02:58:13,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137627497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:58:13,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423792042] [2024-11-16 02:58:13,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:58:13,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:58:13,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:58:13,829 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:58:13,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-16 02:58:13,942 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:58:13,942 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:58:13,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-16 02:58:13,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:58:14,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:58:14,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:58:14,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:58:14,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-16 02:58:14,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:58:14,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-16 02:58:15,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:58:15,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-16 02:58:15,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:58:15,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2024-11-16 02:58:15,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:58:15,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 61 [2024-11-16 02:58:15,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:58:15,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:58:15,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:58:16,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:58:16,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:58:16,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 02:58:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:58:16,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:58:18,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 410 treesize of output 386 [2024-11-16 02:58:19,244 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:58:19,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 1717655818550 treesize of output 1694033498699 [2024-11-16 02:58:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:58:22,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423792042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:58:22,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:58:22,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 36] total 106 [2024-11-16 02:58:22,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300574799] [2024-11-16 02:58:22,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:58:22,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-16 02:58:22,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:58:22,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-16 02:58:22,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1207, Invalid=9923, Unknown=0, NotChecked=0, Total=11130 [2024-11-16 02:58:22,362 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 106 states, 106 states have (on average 1.7075471698113207) internal successors, (181), 106 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)