./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 ../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.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 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-23 00:08:28,648 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 00:08:28,705 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 00:08:28,713 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 00:08:28,714 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 00:08:28,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 00:08:28,744 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 00:08:28,745 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 00:08:28,745 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 00:08:28,747 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 00:08:28,747 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 00:08:28,748 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 00:08:28,749 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 00:08:28,751 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 00:08:28,752 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 00:08:28,752 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 00:08:28,752 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 00:08:28,753 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 00:08:28,753 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 00:08:28,753 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 00:08:28,753 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 00:08:28,755 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 00:08:28,755 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 00:08:28,755 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 00:08:28,755 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 00:08:28,756 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 00:08:28,756 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 00:08:28,756 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 00:08:28,757 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 00:08:28,757 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 00:08:28,757 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 00:08:28,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 00:08:28,758 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 00:08:28,758 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 00:08:28,758 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 00:08:28,759 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 00:08:28,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 00:08:28,759 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 00:08:28,759 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 00:08:28,759 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 00:08:28,759 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 00:08:28,760 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 00:08:28,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-23 00:08:28,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 00:08:29,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 00:08:29,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 00:08:29,011 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 00:08:29,013 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 00:08:29,014 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c [2023-11-23 00:08:30,181 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 00:08:30,343 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 00:08:30,344 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c [2023-11-23 00:08:30,350 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/617952560/f1d7d008950f431ba0040c3da3dac174/FLAGa3ce9e003 [2023-11-23 00:08:30,362 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/617952560/f1d7d008950f431ba0040c3da3dac174 [2023-11-23 00:08:30,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 00:08:30,365 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 00:08:30,366 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 00:08:30,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 00:08:30,384 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 00:08:30,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408275cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30, skipping insertion in model container [2023-11-23 00:08:30,386 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,402 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 00:08:30,518 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2023-11-23 00:08:30,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 00:08:30,563 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 00:08:30,573 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2023-11-23 00:08:30,593 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 00:08:30,607 INFO L206 MainTranslator]: Completed translation [2023-11-23 00:08:30,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30 WrapperNode [2023-11-23 00:08:30,609 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 00:08:30,610 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 00:08:30,610 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 00:08:30,610 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 00:08:30,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,629 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,652 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-11-23 00:08:30,652 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 00:08:30,653 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 00:08:30,653 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 00:08:30,653 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 00:08:30,660 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,660 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,670 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,670 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,681 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,687 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,688 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,692 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,693 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 00:08:30,697 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 00:08:30,697 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 00:08:30,697 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 00:08:30,698 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30" (1/1) ... [2023-11-23 00:08:30,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 00:08:30,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:08:30,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 00:08:30,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 00:08:30,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 00:08:30,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 00:08:30,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 00:08:30,779 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2023-11-23 00:08:30,779 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2023-11-23 00:08:30,780 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2023-11-23 00:08:30,780 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2023-11-23 00:08:30,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 00:08:30,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 00:08:30,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 00:08:30,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 00:08:30,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 00:08:30,781 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 00:08:30,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 00:08:30,850 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 00:08:30,851 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 00:08:31,047 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 00:08:31,070 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 00:08:31,070 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 00:08:31,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:08:31 BoogieIcfgContainer [2023-11-23 00:08:31,071 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 00:08:31,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 00:08:31,073 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 00:08:31,075 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 00:08:31,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:08:30" (1/3) ... [2023-11-23 00:08:31,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf3537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:08:31, skipping insertion in model container [2023-11-23 00:08:31,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:08:30" (2/3) ... [2023-11-23 00:08:31,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf3537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:08:31, skipping insertion in model container [2023-11-23 00:08:31,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:08:31" (3/3) ... [2023-11-23 00:08:31,078 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2023-11-23 00:08:31,092 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 00:08:31,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 00:08:31,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 00:08:31,134 INFO L357 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, mHoare=true, 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;@56e120eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 00:08:31,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 00:08:31,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 00:08:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 00:08:31,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:08:31,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:08:31,145 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:08:31,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:08:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1723775275, now seen corresponding path program 1 times [2023-11-23 00:08:31,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:08:31,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624104583] [2023-11-23 00:08:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:31,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:08:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:08:31,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:08:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624104583] [2023-11-23 00:08:31,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 00:08:31,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413435047] [2023-11-23 00:08:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:31,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:08:31,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:08:31,325 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) [2023-11-23 00:08:31,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 00:08:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:08:31,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 00:08:31,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:08:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:08:31,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 00:08:31,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413435047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:08:31,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:08:31,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 00:08:31,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155858508] [2023-11-23 00:08:31,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:08:31,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 00:08:31,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:08:31,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 00:08:31,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 00:08:31,474 INFO L87 Difference]: Start difference. First operand has 40 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:08:31,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:08:31,521 INFO L93 Difference]: Finished difference Result 78 states and 114 transitions. [2023-11-23 00:08:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 00:08:31,523 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-23 00:08:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:08:31,530 INFO L225 Difference]: With dead ends: 78 [2023-11-23 00:08:31,530 INFO L226 Difference]: Without dead ends: 38 [2023-11-23 00:08:31,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 00:08:31,536 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 00:08:31,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 00:08:31,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-23 00:08:31,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-23 00:08:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 26 states have internal predecessors, (26), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 00:08:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-11-23 00:08:31,580 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2023-11-23 00:08:31,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:08:31,581 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-11-23 00:08:31,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:08:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2023-11-23 00:08:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 00:08:31,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:08:31,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:08:31,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 00:08:31,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 00:08:31,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:08:31,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:08:31,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1891133651, now seen corresponding path program 1 times [2023-11-23 00:08:31,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:08:31,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959049241] [2023-11-23 00:08:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:31,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:08:31,857 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:08:31,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434761804] [2023-11-23 00:08:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:31,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:08:31,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:08:31,876 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) [2023-11-23 00:08:31,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 00:08:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:08:31,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-23 00:08:31,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:08:32,110 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 130038 treesize of output 129014 [2023-11-23 00:08:32,312 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-23 00:08:32,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2023-11-23 00:08:32,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-11-23 00:08:32,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-23 00:08:32,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-11-23 00:08:32,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 00:08:32,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 00:08:32,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 00:08:32,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-23 00:08:32,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-23 00:08:32,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 00:08:32,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-23 00:08:32,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 00:08:32,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 00:08:32,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 00:08:32,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-23 00:08:32,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-23 00:08:32,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 00:08:32,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2023-11-23 00:08:32,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-23 00:08:32,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 00:08:32,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2023-11-23 00:08:32,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-23 00:08:32,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 00:08:32,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 45 treesize of output 42 [2023-11-23 00:08:32,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-11-23 00:08:32,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-23 00:08:32,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 00:08:32,526 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-11-23 00:08:32,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2023-11-23 00:08:32,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-11-23 00:08:32,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-23 00:08:32,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 50 treesize of output 47 [2023-11-23 00:08:32,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2023-11-23 00:08:32,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-23 00:08:32,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 00:08:32,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,572 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 00:08:32,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2023-11-23 00:08:32,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-23 00:08:32,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 00:08:32,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 45 treesize of output 42 [2023-11-23 00:08:32,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-11-23 00:08:32,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-11-23 00:08:32,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 00:08:32,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-23 00:08:32,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-23 00:08:32,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:32,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 00:08:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:08:32,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 00:08:32,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:08:32,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959049241] [2023-11-23 00:08:32,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:08:32,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434761804] [2023-11-23 00:08:32,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434761804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:08:32,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:08:32,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 00:08:32,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736912569] [2023-11-23 00:08:32,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:08:32,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 00:08:32,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:08:32,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 00:08:32,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-23 00:08:32,678 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 9 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:08:32,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:08:32,819 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2023-11-23 00:08:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 00:08:32,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-23 00:08:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:08:32,821 INFO L225 Difference]: With dead ends: 55 [2023-11-23 00:08:32,821 INFO L226 Difference]: Without dead ends: 53 [2023-11-23 00:08:32,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-23 00:08:32,822 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 00:08:32,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 218 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 00:08:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-23 00:08:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-11-23 00:08:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-23 00:08:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2023-11-23 00:08:32,830 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 10 [2023-11-23 00:08:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:08:32,830 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2023-11-23 00:08:32,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:08:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2023-11-23 00:08:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 00:08:32,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:08:32,831 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:08:32,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 00:08:33,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 00:08:33,043 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:08:33,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:08:33,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2014932047, now seen corresponding path program 1 times [2023-11-23 00:08:33,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:08:33,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577143852] [2023-11-23 00:08:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:33,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:08:33,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:08:33,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136400925] [2023-11-23 00:08:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:33,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:08:33,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:08:33,069 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) [2023-11-23 00:08:33,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 00:08:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:08:33,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-23 00:08:33,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:08:33,193 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2023-11-23 00:08:33,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 86 treesize of output 76 [2023-11-23 00:08:33,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-23 00:08:33,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 00:08:33,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:33,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2023-11-23 00:08:33,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-11-23 00:08:33,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2023-11-23 00:08:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:08:33,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 00:08:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:08:39,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:08:39,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577143852] [2023-11-23 00:08:39,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:08:39,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136400925] [2023-11-23 00:08:39,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136400925] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 00:08:39,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 00:08:39,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2023-11-23 00:08:39,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059978454] [2023-11-23 00:08:39,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:08:39,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 00:08:39,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:08:39,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 00:08:39,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=244, Unknown=17, NotChecked=0, Total=306 [2023-11-23 00:08:39,885 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 00:08:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:08:44,268 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2023-11-23 00:08:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 00:08:44,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-23 00:08:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:08:44,270 INFO L225 Difference]: With dead ends: 59 [2023-11-23 00:08:44,270 INFO L226 Difference]: Without dead ends: 57 [2023-11-23 00:08:44,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=59, Invalid=340, Unknown=21, NotChecked=0, Total=420 [2023-11-23 00:08:44,271 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 00:08:44,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 239 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 10 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 00:08:44,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-23 00:08:44,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2023-11-23 00:08:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-23 00:08:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-11-23 00:08:44,278 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 16 [2023-11-23 00:08:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:08:44,278 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-11-23 00:08:44,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 00:08:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-11-23 00:08:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 00:08:44,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:08:44,279 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:08:44,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 00:08:44,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:08:44,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:08:44,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:08:44,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1155274970, now seen corresponding path program 1 times [2023-11-23 00:08:44,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:08:44,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224675592] [2023-11-23 00:08:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:44,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:08:44,501 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:08:44,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673039687] [2023-11-23 00:08:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:44,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:08:44,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:08:44,520 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) [2023-11-23 00:08:44,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 00:08:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:08:44,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-23 00:08:44,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:08:44,673 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 1010678 treesize of output 1002486 [2023-11-23 00:08:44,881 INFO L349 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2023-11-23 00:08:44,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 99 [2023-11-23 00:08:44,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-23 00:08:45,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:45,241 INFO L349 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2023-11-23 00:08:45,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 157 treesize of output 121 [2023-11-23 00:08:45,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 00:08:45,252 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 83 treesize of output 88 [2023-11-23 00:08:45,256 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 79 treesize of output 77 [2023-11-23 00:08:45,260 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 77 treesize of output 75 [2023-11-23 00:08:45,263 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 75 treesize of output 73 [2023-11-23 00:08:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 00:08:45,361 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 00:08:45,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:08:45,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224675592] [2023-11-23 00:08:45,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:08:45,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673039687] [2023-11-23 00:08:45,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673039687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:08:45,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:08:45,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-23 00:08:45,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040831159] [2023-11-23 00:08:45,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:08:45,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 00:08:45,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:08:45,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 00:08:45,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-23 00:08:45,363 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 00:08:45,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:08:45,785 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2023-11-23 00:08:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 00:08:45,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-11-23 00:08:45,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:08:45,788 INFO L225 Difference]: With dead ends: 65 [2023-11-23 00:08:45,788 INFO L226 Difference]: Without dead ends: 63 [2023-11-23 00:08:45,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2023-11-23 00:08:45,789 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 00:08:45,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 274 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 190 Invalid, 2 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 00:08:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-23 00:08:45,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2023-11-23 00:08:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.1) internal successors, (44), 43 states have internal predecessors, (44), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2023-11-23 00:08:45,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2023-11-23 00:08:45,797 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 26 [2023-11-23 00:08:45,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:08:45,797 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2023-11-23 00:08:45,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 00:08:45,797 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2023-11-23 00:08:45,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 00:08:45,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:08:45,798 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:08:45,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 00:08:46,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:08:46,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:08:46,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:08:46,011 INFO L85 PathProgramCache]: Analyzing trace with hash 885029069, now seen corresponding path program 1 times [2023-11-23 00:08:46,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:08:46,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112878798] [2023-11-23 00:08:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:46,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:08:46,036 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:08:46,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461040958] [2023-11-23 00:08:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:46,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:08:46,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:08:46,038 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) [2023-11-23 00:08:46,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 00:08:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:08:46,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-23 00:08:46,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:08:46,139 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2023-11-23 00:08:46,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 86 treesize of output 76 [2023-11-23 00:08:46,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2023-11-23 00:08:46,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:46,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2023-11-23 00:08:46,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 15 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-11-23 00:08:46,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2023-11-23 00:08:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 00:08:46,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 00:08:46,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:08:46,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112878798] [2023-11-23 00:08:46,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:08:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461040958] [2023-11-23 00:08:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461040958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 00:08:46,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 00:08:46,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-23 00:08:46,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560154385] [2023-11-23 00:08:46,566 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 00:08:46,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 00:08:46,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:08:46,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 00:08:46,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-11-23 00:08:46,568 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 00:08:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:08:46,928 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2023-11-23 00:08:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 00:08:46,929 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-23 00:08:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:08:46,930 INFO L225 Difference]: With dead ends: 74 [2023-11-23 00:08:46,930 INFO L226 Difference]: Without dead ends: 64 [2023-11-23 00:08:46,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-23 00:08:46,931 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 00:08:46,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 145 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 00:08:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-23 00:08:46,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2023-11-23 00:08:46,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2023-11-23 00:08:46,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2023-11-23 00:08:46,938 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 26 [2023-11-23 00:08:46,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:08:46,939 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2023-11-23 00:08:46,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 00:08:46,939 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2023-11-23 00:08:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 00:08:46,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:08:46,940 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:08:46,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 00:08:47,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:08:47,163 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:08:47,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:08:47,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1608665275, now seen corresponding path program 1 times [2023-11-23 00:08:47,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:08:47,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367144420] [2023-11-23 00:08:47,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:47,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:08:47,178 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:08:47,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980209810] [2023-11-23 00:08:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:47,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:08:47,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:08:47,180 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) [2023-11-23 00:08:47,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 00:08:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:08:47,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 101 conjunts are in the unsatisfiable core [2023-11-23 00:08:47,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:08:47,308 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2023-11-23 00:08:47,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 86 treesize of output 76 [2023-11-23 00:08:47,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:47,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2023-11-23 00:08:47,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-11-23 00:08:47,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-11-23 00:08:48,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2023-11-23 00:08:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 00:08:48,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 00:08:54,346 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_360 (Array Int Int)) (v_ArrVal_361 (Array Int Int))) (= (select (select (store (store |c_#memory_int| c_func_to_recursive_line_32_to_55_0_~a.base v_ArrVal_360) c_func_to_recursive_line_32_to_55_0_~b.base v_ArrVal_361) c_func_to_recursive_line_32_to_55_0_~q.base) c_func_to_recursive_line_32_to_55_0_~q.offset) 0)) (forall ((v_ArrVal_360 (Array Int Int)) (v_ArrVal_361 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| c_func_to_recursive_line_32_to_55_0_~a.base v_ArrVal_360) c_func_to_recursive_line_32_to_55_0_~b.base v_ArrVal_361))) (= (select (select .cse0 c_func_to_recursive_line_32_to_55_0_~x.base) c_func_to_recursive_line_32_to_55_0_~x.offset) (select (select .cse0 c_func_to_recursive_line_32_to_55_0_~r.base) c_func_to_recursive_line_32_to_55_0_~r.offset))))) is different from false [2023-11-23 00:08:54,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:08:54,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367144420] [2023-11-23 00:08:54,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:08:54,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980209810] [2023-11-23 00:08:54,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980209810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 00:08:54,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 00:08:54,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-23 00:08:54,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037908831] [2023-11-23 00:08:54,358 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 00:08:54,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 00:08:54,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:08:54,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 00:08:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=4, NotChecked=36, Total=420 [2023-11-23 00:08:54,359 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 00:08:56,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 00:08:58,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 00:08:58,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:08:58,940 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2023-11-23 00:08:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 00:08:58,941 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-11-23 00:08:58,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:08:58,942 INFO L225 Difference]: With dead ends: 93 [2023-11-23 00:08:58,942 INFO L226 Difference]: Without dead ends: 91 [2023-11-23 00:08:58,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=4, NotChecked=48, Total=702 [2023-11-23 00:08:58,943 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-23 00:08:58,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 173 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 312 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-23 00:08:58,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-23 00:08:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2023-11-23 00:08:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 60 states have internal predecessors, (61), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (20), 15 states have call predecessors, (20), 18 states have call successors, (20) [2023-11-23 00:08:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2023-11-23 00:08:58,954 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 32 [2023-11-23 00:08:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:08:58,954 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2023-11-23 00:08:58,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 00:08:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2023-11-23 00:08:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 00:08:58,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:08:58,955 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:08:58,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 00:08:59,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:08:59,170 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:08:59,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:08:59,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1697256666, now seen corresponding path program 1 times [2023-11-23 00:08:59,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:08:59,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445229078] [2023-11-23 00:08:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:59,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:08:59,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:08:59,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237781307] [2023-11-23 00:08:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:08:59,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:08:59,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:08:59,203 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) [2023-11-23 00:08:59,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 00:08:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:08:59,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-23 00:08:59,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:08:59,349 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-23 00:08:59,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 267 treesize of output 245 [2023-11-23 00:08:59,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-23 00:08:59,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2023-11-23 00:08:59,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-23 00:08:59,417 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-23 00:08:59,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-11-23 00:08:59,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 42 [2023-11-23 00:08:59,557 INFO L349 Elim1Store]: treesize reduction 96, result has 35.6 percent of original size [2023-11-23 00:08:59,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 51 treesize of output 108 [2023-11-23 00:08:59,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:08:59,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 00:08:59,628 INFO L349 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2023-11-23 00:08:59,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 31 treesize of output 41 [2023-11-23 00:08:59,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 23 [2023-11-23 00:08:59,694 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 00:08:59,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2023-11-23 00:09:00,860 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((v_prenex_12 Int) (v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6 Int) (|ULTIMATE.start_main_~#q~0#1.base| Int) (v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2 Int)) (and (= (select (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6) 0) 0) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2)) (<= 1 (select (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2) 0)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#q~0#1.base|) v_prenex_12) 0))) (exists ((v_DerPreprocessor_5 (Array Int Int)) (v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6 Int) (v_DerPreprocessor_6 (Array Int Int)) (|ULTIMATE.start_main_~#q~0#1.base| Int) (|ULTIMATE.start_main_~#q~0#1.offset| Int) (v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2 Int) (v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6 Int)) (let ((.cse0 (store (store |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6 v_DerPreprocessor_5) v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6 v_DerPreprocessor_6))) (let ((.cse1 (select .cse0 v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6))) (and (= (select (select .cse0 |ULTIMATE.start_main_~#q~0#1.base|) |ULTIMATE.start_main_~#q~0#1.offset|) 0) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6)) (not (= v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6 v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (= v_DerPreprocessor_6 (store .cse1 0 0)) (= (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6) .cse1) (not (= v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2 v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2)) (= (select (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6) 0) 0) (<= 1 (select (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2) 0)))))) (exists ((v_DerPreprocessor_5 (Array Int Int)) (v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6 Int) (v_DerPreprocessor_6 (Array Int Int)) (|ULTIMATE.start_main_~#q~0#1.base| Int) (|ULTIMATE.start_main_~#q~0#1.offset| Int) (v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2 Int)) (let ((.cse2 (store (store |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6 v_DerPreprocessor_5) v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2 v_DerPreprocessor_6))) (let ((.cse3 (select .cse2 v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6))) (and (= (select (select .cse2 |ULTIMATE.start_main_~#q~0#1.base|) |ULTIMATE.start_main_~#q~0#1.offset|) 0) (= .cse3 (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (not (= v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2 v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2)) (= (select (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2) 0) 0) (= (store .cse3 0 0) v_DerPreprocessor_6))))) (exists ((v_DerPreprocessor_5 (Array Int Int)) (v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6 Int) (v_DerPreprocessor_6 (Array Int Int)) (|ULTIMATE.start_main_~#q~0#1.base| Int) (|ULTIMATE.start_main_~#q~0#1.offset| Int) (v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2 Int) (v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6 Int)) (let ((.cse6 (store (store |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6 v_DerPreprocessor_5) v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6 v_DerPreprocessor_6))) (let ((.cse5 (select .cse6 v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (.cse4 (select .cse6 |ULTIMATE.start_main_~#q~0#1.base|))) (and (= (select .cse4 |ULTIMATE.start_main_~#q~0#1.offset|) 0) (not (= v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6 v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (= v_DerPreprocessor_6 (store .cse5 0 0)) (= (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6) .cse5) (= (store .cse4 0 0) (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6)) (not (= v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2 v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2)) (<= 1 (select (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2) 0)))))) (exists ((v_DerPreprocessor_5 (Array Int Int)) (v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6 Int) (v_prenex_14 Int) (v_DerPreprocessor_6 (Array Int Int)) (v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2 Int) (v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6 Int)) (let ((.cse8 (select (store (store |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6 v_DerPreprocessor_5) v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6 v_DerPreprocessor_6) v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (.cse7 (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6))) (and (= (select .cse7 v_prenex_14) 0) (not (= v_func_to_recursive_line_32_to_55_0_~b.base_BEFORE_CALL_6 v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (= v_DerPreprocessor_6 (store .cse8 0 0)) (= (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6) .cse8) (not (= v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2 v_func_to_recursive_line_32_to_55_0_~a.base_BEFORE_CALL_6)) (= (select .cse7 0) 0) (<= 1 (select (select |c_#memory_int| v_func_to_recursive_line_32_to_55_0_~y.base_BEFORE_CALL_2) 0)))))) is different from true [2023-11-23 00:09:08,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:09:29,417 WARN L293 SmtUtils]: Spent 20.79s on a formula simplification. DAG size of input: 3450 DAG size of output: 489 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-23 00:09:29,418 INFO L349 Elim1Store]: treesize reduction 6620, result has 13.5 percent of original size [2023-11-23 00:09:29,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 40 select indices, 40 select index equivalence classes, 4 disjoint index pairs (out of 780 index pairs), introduced 40 new quantified variables, introduced 814 case distinctions, treesize of input 1690 treesize of output 2545 Killed by 15