/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-61.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 11:18:31,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 11:18:31,180 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 11:18:31,182 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 11:18:31,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 11:18:31,201 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 11:18:31,201 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 11:18:31,202 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 11:18:31,202 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 11:18:31,208 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 11:18:31,208 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 11:18:31,209 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 11:18:31,209 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 11:18:31,210 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 11:18:31,210 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 11:18:31,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 11:18:31,210 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 11:18:31,211 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 11:18:31,211 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 11:18:31,211 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 11:18:31,211 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 11:18:31,211 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 11:18:31,211 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 11:18:31,211 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 11:18:31,212 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 11:18:31,212 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 11:18:31,212 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 11:18:31,212 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 11:18:31,212 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 11:18:31,213 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 11:18:31,213 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 11:18:31,213 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 11:18:31,213 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 11:18:31,214 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 11:18:31,214 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 11:18:31,214 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 11:18:31,214 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 11:18:31,214 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 11:18:31,214 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 11:18:31,214 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 11:18:31,214 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 11:18:31,214 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 11:18:31,215 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 11:18:31,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 11:18:31,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 11:18:31,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 11:18:31,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 11:18:31,406 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 11:18:31,406 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 11:18:31,407 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-61.i [2023-12-19 11:18:32,329 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 11:18:32,533 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 11:18:32,534 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-61.i [2023-12-19 11:18:32,544 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a438000d2/eb5918733b2147d4b381961b3f665e7e/FLAGff42f9ac1 [2023-12-19 11:18:32,554 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a438000d2/eb5918733b2147d4b381961b3f665e7e [2023-12-19 11:18:32,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 11:18:32,557 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 11:18:32,559 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 11:18:32,559 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 11:18:32,562 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 11:18:32,562 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,563 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b8bbf66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32, skipping insertion in model container [2023-12-19 11:18:32,563 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,594 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 11:18:32,686 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-61.i[916,929] [2023-12-19 11:18:32,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 11:18:32,753 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 11:18:32,760 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-61.i[916,929] [2023-12-19 11:18:32,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 11:18:32,820 INFO L206 MainTranslator]: Completed translation [2023-12-19 11:18:32,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32 WrapperNode [2023-12-19 11:18:32,821 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 11:18:32,822 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 11:18:32,822 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 11:18:32,822 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 11:18:32,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,835 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,879 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 253 [2023-12-19 11:18:32,879 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 11:18:32,880 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 11:18:32,880 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 11:18:32,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 11:18:32,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,892 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,920 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 11:18:32,920 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,920 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,945 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,948 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,967 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 11:18:32,969 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 11:18:32,969 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 11:18:32,969 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 11:18:32,970 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (1/1) ... [2023-12-19 11:18:32,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 11:18:32,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 11:18:32,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 11:18:33,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 11:18:33,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 11:18:33,019 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 11:18:33,019 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 11:18:33,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 11:18:33,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 11:18:33,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 11:18:33,101 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 11:18:33,102 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 11:18:33,544 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 11:18:33,569 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 11:18:33,569 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 11:18:33,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 11:18:33 BoogieIcfgContainer [2023-12-19 11:18:33,569 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 11:18:33,571 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 11:18:33,571 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 11:18:33,574 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 11:18:33,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 11:18:32" (1/3) ... [2023-12-19 11:18:33,574 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb72197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 11:18:33, skipping insertion in model container [2023-12-19 11:18:33,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:18:32" (2/3) ... [2023-12-19 11:18:33,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb72197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 11:18:33, skipping insertion in model container [2023-12-19 11:18:33,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 11:18:33" (3/3) ... [2023-12-19 11:18:33,576 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-1loop_file-61.i [2023-12-19 11:18:33,591 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 11:18:33,591 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 11:18:33,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 11:18:33,638 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;@5f92e45c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 11:18:33,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 11:18:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 67 states have (on average 1.5522388059701493) internal successors, (104), 68 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-19 11:18:33,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-19 11:18:33,654 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 11:18:33,655 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 11:18:33,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 11:18:33,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 11:18:33,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2016695405, now seen corresponding path program 1 times [2023-12-19 11:18:33,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 11:18:33,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505468272] [2023-12-19 11:18:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:33,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 11:18:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 11:18:33,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 11:18:33,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505468272] [2023-12-19 11:18:33,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 11:18:33,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378092396] [2023-12-19 11:18:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:33,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:33,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 11:18:33,878 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) [2023-12-19 11:18:33,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 11:18:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 11:18:34,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 11:18:34,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 11:18:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2023-12-19 11:18:34,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 11:18:34,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378092396] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 11:18:34,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 11:18:34,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 11:18:34,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475934950] [2023-12-19 11:18:34,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 11:18:34,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 11:18:34,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 11:18:34,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 11:18:34,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 11:18:34,139 INFO L87 Difference]: Start difference. First operand has 96 states, 67 states have (on average 1.5522388059701493) internal successors, (104), 68 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) [2023-12-19 11:18:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 11:18:34,174 INFO L93 Difference]: Finished difference Result 191 states and 337 transitions. [2023-12-19 11:18:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 11:18:34,176 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) Word has length 171 [2023-12-19 11:18:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 11:18:34,183 INFO L225 Difference]: With dead ends: 191 [2023-12-19 11:18:34,183 INFO L226 Difference]: Without dead ends: 94 [2023-12-19 11:18:34,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 11:18:34,189 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 11:18:34,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 148 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 11:18:34,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-19 11:18:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-12-19 11:18:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.5) internal successors, (99), 66 states have internal predecessors, (99), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-19 11:18:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 151 transitions. [2023-12-19 11:18:34,225 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 151 transitions. Word has length 171 [2023-12-19 11:18:34,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 11:18:34,226 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 151 transitions. [2023-12-19 11:18:34,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) [2023-12-19 11:18:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 151 transitions. [2023-12-19 11:18:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-19 11:18:34,228 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 11:18:34,228 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 11:18:34,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 11:18:34,430 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 [2023-12-19 11:18:34,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 11:18:34,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 11:18:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash -442773029, now seen corresponding path program 1 times [2023-12-19 11:18:34,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 11:18:34,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618053634] [2023-12-19 11:18:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:34,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 11:18:34,479 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 11:18:34,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748721257] [2023-12-19 11:18:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:34,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:34,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 11:18:34,483 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) [2023-12-19 11:18:34,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 11:18:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 11:18:34,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 11:18:34,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 11:18:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 435 proven. 60 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2023-12-19 11:18:34,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 11:18:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 15 proven. 60 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-12-19 11:18:35,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 11:18:35,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618053634] [2023-12-19 11:18:35,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 11:18:35,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748721257] [2023-12-19 11:18:35,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748721257] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 11:18:35,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 11:18:35,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-19 11:18:35,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379123731] [2023-12-19 11:18:35,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 11:18:35,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 11:18:35,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 11:18:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 11:18:35,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-19 11:18:35,015 INFO L87 Difference]: Start difference. First operand 94 states and 151 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (46), 2 states have call predecessors, (46), 4 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2023-12-19 11:18:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 11:18:35,373 INFO L93 Difference]: Finished difference Result 294 states and 461 transitions. [2023-12-19 11:18:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 11:18:35,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (46), 2 states have call predecessors, (46), 4 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) Word has length 171 [2023-12-19 11:18:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 11:18:35,376 INFO L225 Difference]: With dead ends: 294 [2023-12-19 11:18:35,376 INFO L226 Difference]: Without dead ends: 201 [2023-12-19 11:18:35,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 333 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-12-19 11:18:35,377 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 423 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 11:18:35,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 444 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 11:18:35,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-12-19 11:18:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 103. [2023-12-19 11:18:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 74 states have internal predecessors, (106), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-19 11:18:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 158 transitions. [2023-12-19 11:18:35,391 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 158 transitions. Word has length 171 [2023-12-19 11:18:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 11:18:35,392 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 158 transitions. [2023-12-19 11:18:35,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (46), 2 states have call predecessors, (46), 4 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2023-12-19 11:18:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 158 transitions. [2023-12-19 11:18:35,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-19 11:18:35,393 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 11:18:35,394 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 11:18:35,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 11:18:35,599 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 [2023-12-19 11:18:35,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 11:18:35,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 11:18:35,600 INFO L85 PathProgramCache]: Analyzing trace with hash -476656682, now seen corresponding path program 1 times [2023-12-19 11:18:35,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 11:18:35,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843179133] [2023-12-19 11:18:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:35,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 11:18:35,632 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 11:18:35,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517372623] [2023-12-19 11:18:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:35,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:35,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 11:18:35,641 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) [2023-12-19 11:18:35,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 11:18:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 11:18:35,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 11:18:35,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 11:18:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-12-19 11:18:36,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 11:18:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-12-19 11:18:36,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 11:18:36,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843179133] [2023-12-19 11:18:36,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 11:18:36,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517372623] [2023-12-19 11:18:36,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517372623] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 11:18:36,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 11:18:36,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-12-19 11:18:36,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279188541] [2023-12-19 11:18:36,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 11:18:36,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 11:18:36,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 11:18:36,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 11:18:36,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-19 11:18:36,454 INFO L87 Difference]: Start difference. First operand 103 states and 158 transitions. Second operand has 12 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-12-19 11:18:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 11:18:37,280 INFO L93 Difference]: Finished difference Result 547 states and 826 transitions. [2023-12-19 11:18:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 11:18:37,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) Word has length 172 [2023-12-19 11:18:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 11:18:37,283 INFO L225 Difference]: With dead ends: 547 [2023-12-19 11:18:37,283 INFO L226 Difference]: Without dead ends: 445 [2023-12-19 11:18:37,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2023-12-19 11:18:37,284 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 582 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 11:18:37,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 877 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 11:18:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-12-19 11:18:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 346. [2023-12-19 11:18:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 259 states have (on average 1.4401544401544402) internal successors, (373), 259 states have internal predecessors, (373), 78 states have call successors, (78), 8 states have call predecessors, (78), 8 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-19 11:18:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 529 transitions. [2023-12-19 11:18:37,316 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 529 transitions. Word has length 172 [2023-12-19 11:18:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 11:18:37,317 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 529 transitions. [2023-12-19 11:18:37,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-12-19 11:18:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 529 transitions. [2023-12-19 11:18:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-19 11:18:37,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 11:18:37,319 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 11:18:37,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 11:18:37,525 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 [2023-12-19 11:18:37,525 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 11:18:37,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 11:18:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2012872280, now seen corresponding path program 1 times [2023-12-19 11:18:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 11:18:37,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293176041] [2023-12-19 11:18:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:37,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 11:18:37,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 11:18:37,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314855068] [2023-12-19 11:18:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:37,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:37,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 11:18:37,555 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) [2023-12-19 11:18:37,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 11:18:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 11:18:37,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 11:18:37,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 11:18:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-12-19 11:18:38,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 11:18:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-12-19 11:18:38,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 11:18:38,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293176041] [2023-12-19 11:18:38,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 11:18:38,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314855068] [2023-12-19 11:18:38,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314855068] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 11:18:38,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 11:18:38,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2023-12-19 11:18:38,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209729903] [2023-12-19 11:18:38,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 11:18:38,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 11:18:38,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 11:18:38,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 11:18:38,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-19 11:18:38,706 INFO L87 Difference]: Start difference. First operand 346 states and 529 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 11:18:39,632 INFO L93 Difference]: Finished difference Result 811 states and 1215 transitions. [2023-12-19 11:18:39,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 11:18:39,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 172 [2023-12-19 11:18:39,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 11:18:39,635 INFO L225 Difference]: With dead ends: 811 [2023-12-19 11:18:39,635 INFO L226 Difference]: Without dead ends: 554 [2023-12-19 11:18:39,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2023-12-19 11:18:39,637 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 361 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 11:18:39,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 683 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 11:18:39,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-12-19 11:18:39,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 370. [2023-12-19 11:18:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 283 states have (on average 1.431095406360424) internal successors, (405), 283 states have internal predecessors, (405), 78 states have call successors, (78), 8 states have call predecessors, (78), 8 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-19 11:18:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 561 transitions. [2023-12-19 11:18:39,664 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 561 transitions. Word has length 172 [2023-12-19 11:18:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 11:18:39,665 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 561 transitions. [2023-12-19 11:18:39,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 561 transitions. [2023-12-19 11:18:39,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-19 11:18:39,666 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 11:18:39,667 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 11:18:39,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 11:18:39,867 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 [2023-12-19 11:18:39,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 11:18:39,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 11:18:39,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1676465587, now seen corresponding path program 1 times [2023-12-19 11:18:39,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 11:18:39,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289818729] [2023-12-19 11:18:39,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:39,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 11:18:39,889 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 11:18:39,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567654623] [2023-12-19 11:18:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:39,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:39,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 11:18:39,891 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) [2023-12-19 11:18:39,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 11:18:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 11:18:40,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 11:18:40,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 11:18:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-12-19 11:18:40,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 11:18:40,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 11:18:40,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289818729] [2023-12-19 11:18:40,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 11:18:40,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567654623] [2023-12-19 11:18:40,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567654623] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 11:18:40,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 11:18:40,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 11:18:40,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326225120] [2023-12-19 11:18:40,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 11:18:40,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 11:18:40,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 11:18:40,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 11:18:40,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-19 11:18:40,149 INFO L87 Difference]: Start difference. First operand 370 states and 561 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 11:18:40,336 INFO L93 Difference]: Finished difference Result 714 states and 1073 transitions. [2023-12-19 11:18:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 11:18:40,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 172 [2023-12-19 11:18:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 11:18:40,338 INFO L225 Difference]: With dead ends: 714 [2023-12-19 11:18:40,339 INFO L226 Difference]: Without dead ends: 433 [2023-12-19 11:18:40,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-19 11:18:40,340 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 84 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 11:18:40,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 554 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 11:18:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-12-19 11:18:40,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 386. [2023-12-19 11:18:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 299 states have (on average 1.434782608695652) internal successors, (429), 299 states have internal predecessors, (429), 78 states have call successors, (78), 8 states have call predecessors, (78), 8 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-19 11:18:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 585 transitions. [2023-12-19 11:18:40,363 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 585 transitions. Word has length 172 [2023-12-19 11:18:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 11:18:40,363 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 585 transitions. [2023-12-19 11:18:40,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 585 transitions. [2023-12-19 11:18:40,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-19 11:18:40,365 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 11:18:40,365 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 11:18:40,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 11:18:40,571 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 [2023-12-19 11:18:40,571 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 11:18:40,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 11:18:40,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1997470124, now seen corresponding path program 1 times [2023-12-19 11:18:40,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 11:18:40,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024025639] [2023-12-19 11:18:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:40,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 11:18:40,589 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 11:18:40,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066920956] [2023-12-19 11:18:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:40,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:40,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 11:18:40,590 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) [2023-12-19 11:18:40,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 11:18:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 11:18:40,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 11:18:40,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 11:18:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-12-19 11:18:40,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 11:18:40,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 11:18:40,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024025639] [2023-12-19 11:18:40,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 11:18:40,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066920956] [2023-12-19 11:18:40,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066920956] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 11:18:40,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 11:18:40,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 11:18:40,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530234944] [2023-12-19 11:18:40,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 11:18:40,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 11:18:40,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 11:18:40,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 11:18:40,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 11:18:40,701 INFO L87 Difference]: Start difference. First operand 386 states and 585 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 11:18:40,742 INFO L93 Difference]: Finished difference Result 912 states and 1385 transitions. [2023-12-19 11:18:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 11:18:40,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 173 [2023-12-19 11:18:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 11:18:40,745 INFO L225 Difference]: With dead ends: 912 [2023-12-19 11:18:40,745 INFO L226 Difference]: Without dead ends: 615 [2023-12-19 11:18:40,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 11:18:40,746 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 136 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 11:18:40,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 392 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 11:18:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-12-19 11:18:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 398. [2023-12-19 11:18:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 311 states have (on average 1.405144694533762) internal successors, (437), 311 states have internal predecessors, (437), 78 states have call successors, (78), 8 states have call predecessors, (78), 8 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-19 11:18:40,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 593 transitions. [2023-12-19 11:18:40,776 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 593 transitions. Word has length 173 [2023-12-19 11:18:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 11:18:40,776 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 593 transitions. [2023-12-19 11:18:40,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 593 transitions. [2023-12-19 11:18:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-19 11:18:40,777 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 11:18:40,777 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 11:18:40,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 11:18:40,983 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 [2023-12-19 11:18:40,984 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 11:18:40,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 11:18:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash -187130886, now seen corresponding path program 1 times [2023-12-19 11:18:40,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 11:18:40,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345931206] [2023-12-19 11:18:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:40,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 11:18:41,019 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 11:18:41,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851181600] [2023-12-19 11:18:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:41,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:41,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 11:18:41,028 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) [2023-12-19 11:18:41,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 11:18:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 11:18:41,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 11:18:41,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 11:18:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-12-19 11:18:41,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 11:18:41,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 11:18:41,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345931206] [2023-12-19 11:18:41,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 11:18:41,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851181600] [2023-12-19 11:18:41,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851181600] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 11:18:41,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 11:18:41,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 11:18:41,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680545647] [2023-12-19 11:18:41,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 11:18:41,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 11:18:41,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 11:18:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 11:18:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-19 11:18:41,258 INFO L87 Difference]: Start difference. First operand 398 states and 593 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 11:18:41,433 INFO L93 Difference]: Finished difference Result 785 states and 1155 transitions. [2023-12-19 11:18:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 11:18:41,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 173 [2023-12-19 11:18:41,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 11:18:41,439 INFO L225 Difference]: With dead ends: 785 [2023-12-19 11:18:41,439 INFO L226 Difference]: Without dead ends: 476 [2023-12-19 11:18:41,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-12-19 11:18:41,440 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 168 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 11:18:41,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 388 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 11:18:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-12-19 11:18:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 390. [2023-12-19 11:18:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 303 states have (on average 1.4158415841584158) internal successors, (429), 303 states have internal predecessors, (429), 78 states have call successors, (78), 8 states have call predecessors, (78), 8 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-19 11:18:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 585 transitions. [2023-12-19 11:18:41,458 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 585 transitions. Word has length 173 [2023-12-19 11:18:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 11:18:41,458 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 585 transitions. [2023-12-19 11:18:41,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:41,459 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 585 transitions. [2023-12-19 11:18:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-12-19 11:18:41,460 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 11:18:41,460 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 11:18:41,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 11:18:41,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:41,666 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 11:18:41,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 11:18:41,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1048405983, now seen corresponding path program 1 times [2023-12-19 11:18:41,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 11:18:41,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407486283] [2023-12-19 11:18:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:41,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 11:18:41,693 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 11:18:41,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187624052] [2023-12-19 11:18:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:41,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:41,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 11:18:41,695 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 11:18:41,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 11:18:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 11:18:41,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-19 11:18:41,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 11:18:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-12-19 11:18:41,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 11:18:41,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 11:18:41,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407486283] [2023-12-19 11:18:41,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 11:18:41,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187624052] [2023-12-19 11:18:41,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187624052] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 11:18:41,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 11:18:41,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 11:18:41,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501441114] [2023-12-19 11:18:41,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 11:18:41,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 11:18:41,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 11:18:41,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 11:18:41,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-19 11:18:41,867 INFO L87 Difference]: Start difference. First operand 390 states and 585 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 11:18:42,036 INFO L93 Difference]: Finished difference Result 961 states and 1417 transitions. [2023-12-19 11:18:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 11:18:42,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 174 [2023-12-19 11:18:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 11:18:42,039 INFO L225 Difference]: With dead ends: 961 [2023-12-19 11:18:42,039 INFO L226 Difference]: Without dead ends: 660 [2023-12-19 11:18:42,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-19 11:18:42,040 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 200 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 11:18:42,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 721 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 11:18:42,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2023-12-19 11:18:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 620. [2023-12-19 11:18:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 508 states have (on average 1.4153543307086613) internal successors, (719), 510 states have internal predecessors, (719), 98 states have call successors, (98), 13 states have call predecessors, (98), 13 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2023-12-19 11:18:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 915 transitions. [2023-12-19 11:18:42,073 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 915 transitions. Word has length 174 [2023-12-19 11:18:42,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 11:18:42,074 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 915 transitions. [2023-12-19 11:18:42,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 915 transitions. [2023-12-19 11:18:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-12-19 11:18:42,075 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 11:18:42,075 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 11:18:42,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-19 11:18:42,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-19 11:18:42,281 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 11:18:42,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 11:18:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash -945738723, now seen corresponding path program 1 times [2023-12-19 11:18:42,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 11:18:42,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259638287] [2023-12-19 11:18:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:42,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 11:18:42,298 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 11:18:42,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468183233] [2023-12-19 11:18:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:42,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:42,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 11:18:42,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 11:18:42,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 11:18:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 11:18:42,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 11:18:42,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 11:18:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-12-19 11:18:42,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 11:18:42,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 11:18:42,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259638287] [2023-12-19 11:18:42,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 11:18:42,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468183233] [2023-12-19 11:18:42,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468183233] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 11:18:42,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 11:18:42,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 11:18:42,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585702084] [2023-12-19 11:18:42,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 11:18:42,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 11:18:42,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 11:18:42,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 11:18:42,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 11:18:42,422 INFO L87 Difference]: Start difference. First operand 620 states and 915 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:42,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 11:18:42,479 INFO L93 Difference]: Finished difference Result 1081 states and 1586 transitions. [2023-12-19 11:18:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 11:18:42,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 174 [2023-12-19 11:18:42,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 11:18:42,483 INFO L225 Difference]: With dead ends: 1081 [2023-12-19 11:18:42,483 INFO L226 Difference]: Without dead ends: 550 [2023-12-19 11:18:42,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 11:18:42,484 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 84 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 11:18:42,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 221 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 11:18:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-12-19 11:18:42,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 490. [2023-12-19 11:18:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 401 states have (on average 1.3965087281795512) internal successors, (560), 401 states have internal predecessors, (560), 78 states have call successors, (78), 10 states have call predecessors, (78), 10 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-19 11:18:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 716 transitions. [2023-12-19 11:18:42,504 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 716 transitions. Word has length 174 [2023-12-19 11:18:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 11:18:42,505 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 716 transitions. [2023-12-19 11:18:42,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 716 transitions. [2023-12-19 11:18:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-19 11:18:42,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 11:18:42,506 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 11:18:42,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 11:18:42,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:42,716 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 11:18:42,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 11:18:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash -563738093, now seen corresponding path program 1 times [2023-12-19 11:18:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 11:18:42,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670480814] [2023-12-19 11:18:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 11:18:42,731 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 11:18:42,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098014951] [2023-12-19 11:18:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:42,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:42,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 11:18:42,733 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 11:18:42,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 11:18:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 11:18:42,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 11:18:42,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 11:18:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-12-19 11:18:42,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 11:18:42,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 11:18:42,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670480814] [2023-12-19 11:18:42,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 11:18:42,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098014951] [2023-12-19 11:18:42,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098014951] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 11:18:42,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 11:18:42,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 11:18:42,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179282605] [2023-12-19 11:18:42,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 11:18:42,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 11:18:42,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 11:18:42,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 11:18:42,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 11:18:42,876 INFO L87 Difference]: Start difference. First operand 490 states and 716 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 11:18:43,060 INFO L93 Difference]: Finished difference Result 803 states and 1167 transitions. [2023-12-19 11:18:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 11:18:43,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 175 [2023-12-19 11:18:43,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 11:18:43,063 INFO L225 Difference]: With dead ends: 803 [2023-12-19 11:18:43,063 INFO L226 Difference]: Without dead ends: 402 [2023-12-19 11:18:43,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 11:18:43,064 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 224 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 11:18:43,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 302 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 11:18:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-12-19 11:18:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 399. [2023-12-19 11:18:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 310 states have (on average 1.3548387096774193) internal successors, (420), 310 states have internal predecessors, (420), 78 states have call successors, (78), 10 states have call predecessors, (78), 10 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-19 11:18:43,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 576 transitions. [2023-12-19 11:18:43,082 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 576 transitions. Word has length 175 [2023-12-19 11:18:43,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 11:18:43,083 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 576 transitions. [2023-12-19 11:18:43,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-12-19 11:18:43,083 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 576 transitions. [2023-12-19 11:18:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-12-19 11:18:43,084 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 11:18:43,084 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 11:18:43,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 11:18:43,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 11:18:43,289 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 11:18:43,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 11:18:43,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1668141623, now seen corresponding path program 1 times [2023-12-19 11:18:43,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 11:18:43,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650204638] [2023-12-19 11:18:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:43,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 11:18:43,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 11:18:43,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308067598] [2023-12-19 11:18:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 11:18:43,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 11:18:43,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 11:18:43,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 11:18:43,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 11:18:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 11:18:43,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-19 11:18:43,427 INFO L285 TraceCheckSpWp]: Computing forward predicates...