/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_dijkstra-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 10:47:38,319 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 10:47:38,381 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 10:47:38,384 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 10:47:38,384 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 10:47:38,407 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 10:47:38,407 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 10:47:38,408 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 10:47:38,408 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 10:47:38,411 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 10:47:38,411 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 10:47:38,412 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 10:47:38,412 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 10:47:38,413 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 10:47:38,413 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 10:47:38,413 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 10:47:38,413 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 10:47:38,414 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 10:47:38,414 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 10:47:38,414 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 10:47:38,414 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 10:47:38,414 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 10:47:38,414 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 10:47:38,415 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 10:47:38,415 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 10:47:38,415 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 10:47:38,415 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 10:47:38,415 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 10:47:38,416 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 10:47:38,416 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 10:47:38,416 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 10:47:38,417 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 10:47:38,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:47:38,417 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 10:47:38,417 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 10:47:38,417 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 10:47:38,417 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 10:47:38,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 10:47:38,417 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 10:47:38,417 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 10:47:38,417 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 10:47:38,418 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 10:47:38,418 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 10:47:38,418 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 10:47:38,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 10:47:38,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 10:47:38,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 10:47:38,613 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 10:47:38,616 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 10:47:38,617 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_dijkstra-u.c [2023-12-21 10:47:39,617 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 10:47:39,765 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 10:47:39,765 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_dijkstra-u.c [2023-12-21 10:47:39,770 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfeb3eef/fdc06e0920434f648eb1609b0cdf47ae/FLAGe5da87031 [2023-12-21 10:47:39,779 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfeb3eef/fdc06e0920434f648eb1609b0cdf47ae [2023-12-21 10:47:39,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 10:47:39,781 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 10:47:39,782 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 10:47:39,782 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 10:47:39,785 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 10:47:39,786 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:47:39" (1/1) ... [2023-12-21 10:47:39,786 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44866644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:39, skipping insertion in model container [2023-12-21 10:47:39,787 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:47:39" (1/1) ... [2023-12-21 10:47:39,809 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 10:47:39,900 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2023-12-21 10:47:39,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:47:39,969 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 10:47:39,976 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2023-12-21 10:47:39,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:47:40,000 INFO L206 MainTranslator]: Completed translation [2023-12-21 10:47:40,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40 WrapperNode [2023-12-21 10:47:40,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 10:47:40,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 10:47:40,001 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 10:47:40,001 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 10:47:40,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (1/1) ... [2023-12-21 10:47:40,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (1/1) ... [2023-12-21 10:47:40,043 INFO L138 Inliner]: procedures = 17, calls = 173, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2023-12-21 10:47:40,043 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 10:47:40,043 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 10:47:40,044 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 10:47:40,044 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 10:47:40,051 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (1/1) ... [2023-12-21 10:47:40,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (1/1) ... [2023-12-21 10:47:40,053 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (1/1) ... [2023-12-21 10:47:40,065 INFO L175 MemorySlicer]: Split 139 memory accesses to 6 slices as follows [2, 30, 21, 35, 22, 29]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 11 writes are split as follows [0, 2, 1, 3, 2, 3]. [2023-12-21 10:47:40,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (1/1) ... [2023-12-21 10:47:40,072 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (1/1) ... [2023-12-21 10:47:40,090 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (1/1) ... [2023-12-21 10:47:40,091 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (1/1) ... [2023-12-21 10:47:40,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (1/1) ... [2023-12-21 10:47:40,094 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (1/1) ... [2023-12-21 10:47:40,096 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 10:47:40,097 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 10:47:40,097 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 10:47:40,097 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 10:47:40,098 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (1/1) ... [2023-12-21 10:47:40,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:47:40,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:47:40,120 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) [2023-12-21 10:47:40,125 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 [2023-12-21 10:47:40,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 10:47:40,144 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_33_0 [2023-12-21 10:47:40,144 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_33_0 [2023-12-21 10:47:40,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 10:47:40,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 10:47:40,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 10:47:40,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-21 10:47:40,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-21 10:47:40,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-12-21 10:47:40,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 10:47:40,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 10:47:40,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 10:47:40,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-21 10:47:40,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-21 10:47:40,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-21 10:47:40,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-12-21 10:47:40,145 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_53_0 [2023-12-21 10:47:40,145 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_53_0 [2023-12-21 10:47:40,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 10:47:40,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 10:47:40,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 10:47:40,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 10:47:40,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-21 10:47:40,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-21 10:47:40,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-21 10:47:40,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-12-21 10:47:40,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 10:47:40,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 10:47:40,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 10:47:40,227 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 10:47:40,228 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 10:47:40,466 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 10:47:40,488 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 10:47:40,488 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-21 10:47:40,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:47:40 BoogieIcfgContainer [2023-12-21 10:47:40,489 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 10:47:40,490 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 10:47:40,490 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 10:47:40,492 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 10:47:40,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:47:39" (1/3) ... [2023-12-21 10:47:40,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e43114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:47:40, skipping insertion in model container [2023-12-21 10:47:40,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:40" (2/3) ... [2023-12-21 10:47:40,494 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e43114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:47:40, skipping insertion in model container [2023-12-21 10:47:40,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:47:40" (3/3) ... [2023-12-21 10:47:40,494 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra-u.c [2023-12-21 10:47:40,510 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 10:47:40,510 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 10:47:40,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 10:47:40,549 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;@735885b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 10:47:40,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 10:47:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-21 10:47:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-21 10:47:40,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:47:40,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:47:40,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:47:40,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:47:40,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1180092585, now seen corresponding path program 1 times [2023-12-21 10:47:40,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:47:40,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837159059] [2023-12-21 10:47:40,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:47:40,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:47:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:47:40,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:47:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:47:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:47:40,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:47:40,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837159059] [2023-12-21 10:47:40,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837159059] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:47:40,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:47:40,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 10:47:40,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216121205] [2023-12-21 10:47:40,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:47:40,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 10:47:40,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:47:40,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 10:47:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 10:47:40,780 INFO L87 Difference]: Start difference. First operand has 44 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:47:40,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:47:40,899 INFO L93 Difference]: Finished difference Result 90 states and 136 transitions. [2023-12-21 10:47:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 10:47:40,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-21 10:47:40,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:47:40,907 INFO L225 Difference]: With dead ends: 90 [2023-12-21 10:47:40,907 INFO L226 Difference]: Without dead ends: 46 [2023-12-21 10:47:40,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 10:47:40,912 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:47:40,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 40 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:47:40,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-21 10:47:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2023-12-21 10:47:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-21 10:47:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2023-12-21 10:47:40,947 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 15 [2023-12-21 10:47:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:47:40,948 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2023-12-21 10:47:40,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:47:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2023-12-21 10:47:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-21 10:47:40,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:47:40,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:47:40,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 10:47:40,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:47:40,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:47:40,950 INFO L85 PathProgramCache]: Analyzing trace with hash 318761401, now seen corresponding path program 1 times [2023-12-21 10:47:40,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:47:40,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779383406] [2023-12-21 10:47:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:47:40,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:47:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:47:41,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:47:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:47:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:47:41,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:47:41,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779383406] [2023-12-21 10:47:41,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779383406] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:47:41,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:47:41,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-12-21 10:47:41,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942257053] [2023-12-21 10:47:41,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:47:41,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 10:47:41,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:47:41,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 10:47:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-21 10:47:41,977 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 13 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:47:42,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:47:42,564 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2023-12-21 10:47:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 10:47:42,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-12-21 10:47:42,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:47:42,566 INFO L225 Difference]: With dead ends: 76 [2023-12-21 10:47:42,566 INFO L226 Difference]: Without dead ends: 74 [2023-12-21 10:47:42,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-12-21 10:47:42,567 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 10:47:42,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 113 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 10:47:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-21 10:47:42,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2023-12-21 10:47:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 20 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) [2023-12-21 10:47:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2023-12-21 10:47:42,579 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 16 [2023-12-21 10:47:42,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:47:42,579 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2023-12-21 10:47:42,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:47:42,579 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2023-12-21 10:47:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 10:47:42,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:47:42,580 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:47:42,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 10:47:42,580 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:47:42,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:47:42,580 INFO L85 PathProgramCache]: Analyzing trace with hash -210214075, now seen corresponding path program 1 times [2023-12-21 10:47:42,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:47:42,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834225757] [2023-12-21 10:47:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:47:42,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:47:42,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:47:42,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93709887] [2023-12-21 10:47:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:47:42,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:47:42,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:47:42,608 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) [2023-12-21 10:47:42,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 10:47:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:47:42,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-21 10:47:42,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:47:42,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 10:47:42,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 10:47:42,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:47:43,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-12-21 10:47:43,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 10:47:43,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 10:47:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:47:43,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:47:43,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:47:43,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834225757] [2023-12-21 10:47:43,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:47:43,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93709887] [2023-12-21 10:47:43,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93709887] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:47:43,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:47:43,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-21 10:47:43,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369835746] [2023-12-21 10:47:43,372 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:47:43,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 10:47:43,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:47:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 10:47:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-12-21 10:47:43,375 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 10:47:43,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:47:43,898 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2023-12-21 10:47:43,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 10:47:43,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-12-21 10:47:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:47:43,900 INFO L225 Difference]: With dead ends: 115 [2023-12-21 10:47:43,900 INFO L226 Difference]: Without dead ends: 113 [2023-12-21 10:47:43,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-12-21 10:47:43,901 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 10:47:43,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 184 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 10:47:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-21 10:47:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2023-12-21 10:47:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 states have internal predecessors, (69), 30 states have call successors, (30), 8 states have call predecessors, (30), 11 states have return successors, (37), 29 states have call predecessors, (37), 28 states have call successors, (37) [2023-12-21 10:47:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2023-12-21 10:47:43,919 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 22 [2023-12-21 10:47:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:47:43,920 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2023-12-21 10:47:43,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 10:47:43,920 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2023-12-21 10:47:43,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 10:47:43,921 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:47:43,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:47:43,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 10:47:44,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:47:44,127 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:47:44,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:47:44,128 INFO L85 PathProgramCache]: Analyzing trace with hash 661147168, now seen corresponding path program 1 times [2023-12-21 10:47:44,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:47:44,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431223473] [2023-12-21 10:47:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:47:44,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:47:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:47:44,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:47:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:47:44,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:47:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:47:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 10:47:45,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:47:45,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431223473] [2023-12-21 10:47:45,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431223473] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:47:45,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339676906] [2023-12-21 10:47:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:47:45,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:47:45,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:47:45,076 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) [2023-12-21 10:47:45,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 10:47:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:47:45,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 107 conjunts are in the unsatisfiable core [2023-12-21 10:47:45,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:47:45,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 10:47:45,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:47:45,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 10:47:45,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:47:45,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:47:45,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2023-12-21 10:47:45,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:47:45,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 10:47:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 10:47:45,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:47:46,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339676906] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:47:46,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:47:46,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2023-12-21 10:47:46,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683543473] [2023-12-21 10:47:46,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:47:46,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 10:47:46,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:47:46,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 10:47:46,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2023-12-21 10:47:46,571 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 30 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 10:47:51,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:47:59,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:48:03,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:48:08,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:48:12,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:48:16,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:48:20,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:48:24,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:48:28,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:48:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:48:29,005 INFO L93 Difference]: Finished difference Result 151 states and 196 transitions. [2023-12-21 10:48:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-21 10:48:29,005 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2023-12-21 10:48:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:48:29,007 INFO L225 Difference]: With dead ends: 151 [2023-12-21 10:48:29,007 INFO L226 Difference]: Without dead ends: 149 [2023-12-21 10:48:29,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=246, Invalid=2615, Unknown=1, NotChecked=0, Total=2862 [2023-12-21 10:48:29,008 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 128 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 92 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.5s IncrementalHoareTripleChecker+Time [2023-12-21 10:48:29,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 380 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1667 Invalid, 9 Unknown, 0 Unchecked, 37.5s Time] [2023-12-21 10:48:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-21 10:48:29,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 140. [2023-12-21 10:48:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 89 states have internal predecessors, (96), 37 states have call successors, (37), 13 states have call predecessors, (37), 17 states have return successors, (48), 37 states have call predecessors, (48), 35 states have call successors, (48) [2023-12-21 10:48:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 181 transitions. [2023-12-21 10:48:29,028 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 181 transitions. Word has length 22 [2023-12-21 10:48:29,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:48:29,028 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 181 transitions. [2023-12-21 10:48:29,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 10:48:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 181 transitions. [2023-12-21 10:48:29,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-21 10:48:29,029 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:48:29,029 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:48:29,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 10:48:29,229 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,SelfDestructingSolverStorable3 [2023-12-21 10:48:29,230 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:48:29,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:48:29,230 INFO L85 PathProgramCache]: Analyzing trace with hash 466428615, now seen corresponding path program 2 times [2023-12-21 10:48:29,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:48:29,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317579155] [2023-12-21 10:48:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:48:29,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:48:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:48:29,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:48:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:48:30,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:48:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:48:30,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:48:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:48:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:48:30,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:48:30,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317579155] [2023-12-21 10:48:30,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317579155] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:48:30,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400849029] [2023-12-21 10:48:30,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:48:30,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:48:30,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:48:30,557 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) [2023-12-21 10:48:30,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 10:48:30,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:48:30,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:48:30,775 WARN L260 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 127 conjunts are in the unsatisfiable core [2023-12-21 10:48:30,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:48:30,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 10:48:30,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 10:48:30,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:48:30,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:48:31,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:48:31,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:48:31,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2023-12-21 10:48:31,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 10:48:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 10:48:31,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:48:32,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400849029] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:48:32,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:48:32,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2023-12-21 10:48:32,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174778332] [2023-12-21 10:48:32,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:48:32,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-21 10:48:32,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:48:32,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-21 10:48:32,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2023-12-21 10:48:32,790 INFO L87 Difference]: Start difference. First operand 140 states and 181 transitions. Second operand has 34 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 10:48:43,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:48:52,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:48:56,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:49:00,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:49:04,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:49:08,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:49:12,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:49:17,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:49:21,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:49:26,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:49:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:49:26,144 INFO L93 Difference]: Finished difference Result 179 states and 232 transitions. [2023-12-21 10:49:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-21 10:49:26,145 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2023-12-21 10:49:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:49:26,147 INFO L225 Difference]: With dead ends: 179 [2023-12-21 10:49:26,147 INFO L226 Difference]: Without dead ends: 177 [2023-12-21 10:49:26,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=299, Invalid=3605, Unknown=2, NotChecked=0, Total=3906 [2023-12-21 10:49:26,148 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 106 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 72 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.4s IncrementalHoareTripleChecker+Time [2023-12-21 10:49:26,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 505 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2345 Invalid, 10 Unknown, 0 Unchecked, 43.4s Time] [2023-12-21 10:49:26,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-12-21 10:49:26,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 145. [2023-12-21 10:49:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 92 states have internal predecessors, (98), 38 states have call successors, (38), 13 states have call predecessors, (38), 19 states have return successors, (53), 39 states have call predecessors, (53), 36 states have call successors, (53) [2023-12-21 10:49:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 189 transitions. [2023-12-21 10:49:26,181 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 189 transitions. Word has length 28 [2023-12-21 10:49:26,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:49:26,181 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 189 transitions. [2023-12-21 10:49:26,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 10:49:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 189 transitions. [2023-12-21 10:49:26,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-21 10:49:26,182 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:49:26,182 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:49:26,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-21 10:49:26,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:49:26,389 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:49:26,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:49:26,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1566657743, now seen corresponding path program 1 times [2023-12-21 10:49:26,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:49:26,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512222123] [2023-12-21 10:49:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:49:26,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:49:26,413 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:49:26,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309727440] [2023-12-21 10:49:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:49:26,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:49:26,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:49:26,428 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) [2023-12-21 10:49:26,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 10:49:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:49:26,569 WARN L260 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 141 conjunts are in the unsatisfiable core [2023-12-21 10:49:26,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:49:26,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 10:49:26,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:49:26,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:49:26,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 10:49:26,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:49:27,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-12-21 10:49:27,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-12-21 10:49:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:49:27,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:49:51,807 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 10:49:51,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:49:51,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512222123] [2023-12-21 10:49:51,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:49:51,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309727440] [2023-12-21 10:49:51,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309727440] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:49:51,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:49:51,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-12-21 10:49:51,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794391947] [2023-12-21 10:49:51,809 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:49:51,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 10:49:51,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:49:51,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 10:49:51,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=287, Unknown=3, NotChecked=0, Total=342 [2023-12-21 10:49:51,810 INFO L87 Difference]: Start difference. First operand 145 states and 189 transitions. Second operand has 14 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 10:50:05,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:50:05,743 INFO L93 Difference]: Finished difference Result 163 states and 207 transitions. [2023-12-21 10:50:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 10:50:05,743 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-12-21 10:50:05,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:50:05,745 INFO L225 Difference]: With dead ends: 163 [2023-12-21 10:50:05,745 INFO L226 Difference]: Without dead ends: 161 [2023-12-21 10:50:05,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=135, Invalid=616, Unknown=5, NotChecked=0, Total=756 [2023-12-21 10:50:05,746 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 10:50:05,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 209 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 10:50:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-21 10:50:05,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2023-12-21 10:50:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 96 states have (on average 1.125) internal successors, (108), 101 states have internal predecessors, (108), 41 states have call successors, (41), 15 states have call predecessors, (41), 21 states have return successors, (55), 42 states have call predecessors, (55), 38 states have call successors, (55) [2023-12-21 10:50:05,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2023-12-21 10:50:05,775 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 28 [2023-12-21 10:50:05,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:50:05,775 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2023-12-21 10:50:05,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 10:50:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2023-12-21 10:50:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-21 10:50:05,777 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:50:05,778 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:50:05,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 10:50:05,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:50:05,984 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:50:05,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:50:05,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1068029870, now seen corresponding path program 3 times [2023-12-21 10:50:05,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:50:05,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338747562] [2023-12-21 10:50:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:50:05,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:50:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:50:06,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:50:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:50:07,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:50:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:50:07,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:50:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:50:07,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:50:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:50:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 10:50:07,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:50:07,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338747562] [2023-12-21 10:50:07,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338747562] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:50:07,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096151741] [2023-12-21 10:50:07,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 10:50:07,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:50:07,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:50:07,749 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) [2023-12-21 10:50:07,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 10:50:07,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 10:50:07,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:50:07,983 WARN L260 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 154 conjunts are in the unsatisfiable core [2023-12-21 10:50:07,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:50:08,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 10:50:08,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:50:08,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:50:08,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 10:50:08,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:50:08,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2023-12-21 10:50:08,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:50:09,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 10:50:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 10:50:09,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:50:10,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096151741] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:50:10,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:50:10,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 39 [2023-12-21 10:50:10,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537652759] [2023-12-21 10:50:10,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:50:10,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-21 10:50:10,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:50:10,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-21 10:50:10,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2023-12-21 10:50:10,698 INFO L87 Difference]: Start difference. First operand 159 states and 204 transitions. Second operand has 39 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-21 10:50:26,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:50:30,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:50:34,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:50:39,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:50:43,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:50:48,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:50:52,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:50:56,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:51:00,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:51:01,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:51:01,134 INFO L93 Difference]: Finished difference Result 219 states and 279 transitions. [2023-12-21 10:51:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-21 10:51:01,135 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 34 [2023-12-21 10:51:01,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:51:01,136 INFO L225 Difference]: With dead ends: 219 [2023-12-21 10:51:01,136 INFO L226 Difference]: Without dead ends: 217 [2023-12-21 10:51:01,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=596, Invalid=6712, Unknown=2, NotChecked=0, Total=7310 [2023-12-21 10:51:01,138 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 149 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 3216 mSolverCounterSat, 114 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 3339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3216 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.5s IncrementalHoareTripleChecker+Time [2023-12-21 10:51:01,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 679 Invalid, 3339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3216 Invalid, 9 Unknown, 0 Unchecked, 39.5s Time] [2023-12-21 10:51:01,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-12-21 10:51:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 172. [2023-12-21 10:51:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 111 states have internal predecessors, (119), 42 states have call successors, (42), 17 states have call predecessors, (42), 24 states have return successors, (55), 44 states have call predecessors, (55), 39 states have call successors, (55) [2023-12-21 10:51:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 216 transitions. [2023-12-21 10:51:01,203 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 216 transitions. Word has length 34 [2023-12-21 10:51:01,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:51:01,204 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 216 transitions. [2023-12-21 10:51:01,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-21 10:51:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 216 transitions. [2023-12-21 10:51:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-21 10:51:01,208 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:51:01,208 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:51:01,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-21 10:51:01,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:51:01,413 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:51:01,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:51:01,413 INFO L85 PathProgramCache]: Analyzing trace with hash -858116137, now seen corresponding path program 1 times [2023-12-21 10:51:01,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:51:01,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078102864] [2023-12-21 10:51:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:51:01,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:51:01,439 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:51:01,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581233488] [2023-12-21 10:51:01,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:51:01,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:51:01,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:51:01,445 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) [2023-12-21 10:51:01,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 10:51:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:51:01,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 99 conjunts are in the unsatisfiable core [2023-12-21 10:51:01,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:51:01,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 10:51:01,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 10:51:05,633 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#r~0#1.base_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_main_~#n~0#1.base_BEFORE_CALL_11| Int)) (= (select (select |c_#memory_int#4| |v_ULTIMATE.start_main_~#r~0#1.base_BEFORE_CALL_14|) 0) (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~#n~0#1.base_BEFORE_CALL_11|) 0))) is different from true [2023-12-21 10:51:09,677 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_4 Int) (v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4 Int)) (= (select (select |c_#memory_int#2| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4) 0) (select (select |c_#memory_int#4| v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_4) 0))) is different from true [2023-12-21 10:51:13,705 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_5 Int) (v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_5 Int)) (= (select (select |c_#memory_int#4| v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_5) 0) (select (select |c_#memory_int#2| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_5) 0))) is different from true [2023-12-21 10:51:17,745 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_6 Int) (v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_6 Int)) (= (select (select |c_#memory_int#2| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_6) 0) (select (select |c_#memory_int#4| v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_6) 0))) is different from true [2023-12-21 10:51:17,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2023-12-21 10:51:17,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2023-12-21 10:51:17,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2023-12-21 10:51:17,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2023-12-21 10:51:17,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 10:51:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 17 not checked. [2023-12-21 10:51:22,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:51:33,944 WARN L876 $PredicateComparison]: unable to prove that (or (forall ((|func_to_recursive_line_37_to_53_0_#t~mem19| Int) (|func_to_recursive_line_37_to_53_0_#t~mem28| Int) (|func_to_recursive_line_37_to_53_0_#t~mem17| Int) (|func_to_recursive_line_37_to_53_0_#t~mem29| Int) (|func_to_recursive_line_37_to_53_0_#t~mem18| Int) (|func_to_recursive_line_37_to_53_0_#t~mem15| Int) (|func_to_recursive_line_37_to_53_0_#t~mem26| Int) (|func_to_recursive_line_37_to_53_0_#t~mem27| Int) (|func_to_recursive_line_37_to_53_0_#t~mem16| Int) (|func_to_recursive_line_37_to_53_0_#t~mem24| Int) (|func_to_recursive_line_37_to_53_0_#t~mem14| Int) (|func_to_recursive_line_37_to_53_0_#t~mem25| Int) (|func_to_recursive_line_37_to_53_0_#t~mem22| Int) (|func_to_recursive_line_37_to_53_0_#t~mem33| Int) (|func_to_recursive_line_37_to_53_0_#t~mem23| Int) (|func_to_recursive_line_37_to_53_0_#t~mem31| Int) (|func_to_recursive_line_37_to_53_0_#t~mem20| Int) (|func_to_recursive_line_37_to_53_0_#t~mem32| Int) (|func_to_recursive_line_37_to_53_0_#t~mem21| Int) (|func_to_recursive_line_37_to_53_0_#t~mem30| Int)) (not (= (mod (+ (* |func_to_recursive_line_37_to_53_0_#t~mem24| |func_to_recursive_line_37_to_53_0_#t~mem23| |func_to_recursive_line_37_to_53_0_#t~mem22| 4294967295) (* |func_to_recursive_line_37_to_53_0_#t~mem33| |func_to_recursive_line_37_to_53_0_#t~mem32| |func_to_recursive_line_37_to_53_0_#t~mem31| 4294967280) (* |func_to_recursive_line_37_to_53_0_#t~mem29| |func_to_recursive_line_37_to_53_0_#t~mem28| |func_to_recursive_line_37_to_53_0_#t~mem30| 12) (* |func_to_recursive_line_37_to_53_0_#t~mem27| |func_to_recursive_line_37_to_53_0_#t~mem26| |func_to_recursive_line_37_to_53_0_#t~mem25| 4294967292) (* |func_to_recursive_line_37_to_53_0_#t~mem18| |func_to_recursive_line_37_to_53_0_#t~mem17| |func_to_recursive_line_37_to_53_0_#t~mem16| 4294967284) (* |func_to_recursive_line_37_to_53_0_#t~mem19| |func_to_recursive_line_37_to_53_0_#t~mem21| |func_to_recursive_line_37_to_53_0_#t~mem20| 16) (* |func_to_recursive_line_37_to_53_0_#t~mem15| |func_to_recursive_line_37_to_53_0_#t~mem14| |c_func_to_recursive_line_37_to_53_0_#t~mem13|)) 4294967296) 0))) (= (mod (let ((.cse1 (select (select |c_#memory_int#1| c_func_to_recursive_line_37_to_53_0_~h.base) c_func_to_recursive_line_37_to_53_0_~h.offset)) (.cse4 (select (select |c_#memory_int#5| c_func_to_recursive_line_37_to_53_0_~p.base) c_func_to_recursive_line_37_to_53_0_~p.offset)) (.cse0 (select (select |c_#memory_int#2| c_func_to_recursive_line_37_to_53_0_~n.base) c_func_to_recursive_line_37_to_53_0_~n.offset)) (.cse3 (select (select |c_#memory_int#4| c_func_to_recursive_line_37_to_53_0_~r.base) c_func_to_recursive_line_37_to_53_0_~r.offset)) (.cse2 (select (select |c_#memory_int#3| c_func_to_recursive_line_37_to_53_0_~q.base) c_func_to_recursive_line_37_to_53_0_~q.offset))) (+ (* .cse0 .cse1 .cse1) (* .cse2 .cse2 4294967295 .cse0) (* .cse3 .cse2 .cse2) (* 4294967292 .cse0 .cse1 .cse4) (* .cse3 4294967295 .cse1 .cse1) (* .cse3 .cse1 4 .cse4) (* .cse2 .cse0 .cse0 4) (* .cse3 .cse2 4294967288 .cse0) (* .cse3 .cse3 .cse2 4))) 4294967296) 0)) is different from true [2023-12-21 10:51:33,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:51:33,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078102864] [2023-12-21 10:51:33,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:51:33,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581233488] [2023-12-21 10:51:33,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581233488] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:51:33,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:51:33,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-21 10:51:33,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164856889] [2023-12-21 10:51:33,946 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:51:33,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 10:51:33,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:51:33,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 10:51:33,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=206, Unknown=7, NotChecked=160, Total=420 [2023-12-21 10:51:33,947 INFO L87 Difference]: Start difference. First operand 172 states and 216 transitions. Second operand has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-21 10:51:46,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:51:46,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:51:46,629 INFO L93 Difference]: Finished difference Result 192 states and 234 transitions. [2023-12-21 10:51:46,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 10:51:46,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2023-12-21 10:51:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:51:46,630 INFO L225 Difference]: With dead ends: 192 [2023-12-21 10:51:46,630 INFO L226 Difference]: Without dead ends: 190 [2023-12-21 10:51:46,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=79, Invalid=352, Unknown=9, NotChecked=210, Total=650 [2023-12-21 10:51:46,631 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-21 10:51:46,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 301 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 311 Invalid, 1 Unknown, 561 Unchecked, 4.4s Time] [2023-12-21 10:51:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-12-21 10:51:46,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2023-12-21 10:51:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 123 states have internal predecessors, (133), 42 states have call successors, (42), 21 states have call predecessors, (42), 28 states have return successors, (55), 44 states have call predecessors, (55), 39 states have call successors, (55) [2023-12-21 10:51:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 230 transitions. [2023-12-21 10:51:46,657 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 230 transitions. Word has length 34 [2023-12-21 10:51:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:51:46,658 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 230 transitions. [2023-12-21 10:51:46,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-21 10:51:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 230 transitions. [2023-12-21 10:51:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-21 10:51:46,658 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:51:46,658 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:51:46,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 10:51:46,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:51:46,862 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:51:46,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:51:46,863 INFO L85 PathProgramCache]: Analyzing trace with hash 990596790, now seen corresponding path program 1 times [2023-12-21 10:51:46,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:51:46,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416208461] [2023-12-21 10:51:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:51:46,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:51:46,878 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:51:46,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053859044] [2023-12-21 10:51:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:51:46,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:51:46,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:51:46,879 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) [2023-12-21 10:51:46,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 10:51:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:51:47,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 137 conjunts are in the unsatisfiable core [2023-12-21 10:51:47,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:51:47,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 10:51:47,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 10:51:47,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:51:47,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:51:47,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:51:47,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:51:47,790 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:51:47,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2023-12-21 10:51:47,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:51:47,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2023-12-21 10:51:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 10:51:47,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:51:53,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:51:53,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416208461] [2023-12-21 10:51:53,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:51:53,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053859044] [2023-12-21 10:51:53,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053859044] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:51:53,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:51:53,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-21 10:51:53,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795701748] [2023-12-21 10:51:53,553 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:51:53,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 10:51:53,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:51:53,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 10:51:53,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=329, Unknown=1, NotChecked=0, Total=380 [2023-12-21 10:51:53,554 INFO L87 Difference]: Start difference. First operand 188 states and 230 transitions. Second operand has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-21 10:52:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:52:03,229 INFO L93 Difference]: Finished difference Result 244 states and 291 transitions. [2023-12-21 10:52:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 10:52:03,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2023-12-21 10:52:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:52:03,230 INFO L225 Difference]: With dead ends: 244 [2023-12-21 10:52:03,230 INFO L226 Difference]: Without dead ends: 242 [2023-12-21 10:52:03,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=119, Invalid=634, Unknown=3, NotChecked=0, Total=756 [2023-12-21 10:52:03,231 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 53 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 38 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:52:03,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 294 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 857 Invalid, 16 Unknown, 0 Unchecked, 1.0s Time] [2023-12-21 10:52:03,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-12-21 10:52:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 236. [2023-12-21 10:52:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 147 states have (on average 1.1224489795918366) internal successors, (165), 153 states have internal predecessors, (165), 52 states have call successors, (52), 27 states have call predecessors, (52), 36 states have return successors, (68), 55 states have call predecessors, (68), 48 states have call successors, (68) [2023-12-21 10:52:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2023-12-21 10:52:03,281 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 34 [2023-12-21 10:52:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:52:03,282 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2023-12-21 10:52:03,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-21 10:52:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2023-12-21 10:52:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 10:52:03,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:52:03,284 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:52:03,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 10:52:03,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:52:03,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:52:03,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:52:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1467604181, now seen corresponding path program 4 times [2023-12-21 10:52:03,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:52:03,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268982700] [2023-12-21 10:52:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:52:03,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:52:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:52:04,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:52:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:52:08,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:52:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:52:09,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:52:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:52:09,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:52:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:52:09,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:52:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:52:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 10:52:09,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:52:09,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268982700] [2023-12-21 10:52:09,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268982700] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:52:09,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778346820] [2023-12-21 10:52:09,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 10:52:09,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:52:09,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:52:09,777 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) [2023-12-21 10:52:09,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 10:52:09,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 10:52:09,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:52:09,927 WARN L260 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 172 conjunts are in the unsatisfiable core [2023-12-21 10:52:09,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:52:09,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 10:52:10,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 10:52:10,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:52:10,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:52:11,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:52:11,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2023-12-21 10:52:11,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:52:11,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:52:11,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2023-12-21 10:52:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-21 10:52:11,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:52:13,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778346820] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:52:13,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:52:13,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19] total 43 [2023-12-21 10:52:13,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953203264] [2023-12-21 10:52:13,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:52:13,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-21 10:52:13,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:52:13,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-21 10:52:13,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2311, Unknown=0, NotChecked=0, Total=2450 [2023-12-21 10:52:13,363 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand has 43 states, 32 states have (on average 1.28125) internal successors, (41), 35 states have internal predecessors, (41), 11 states have call successors, (11), 6 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-21 10:52:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:52:21,686 INFO L93 Difference]: Finished difference Result 290 states and 353 transitions. [2023-12-21 10:52:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-21 10:52:21,686 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 32 states have (on average 1.28125) internal successors, (41), 35 states have internal predecessors, (41), 11 states have call successors, (11), 6 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 40 [2023-12-21 10:52:21,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:52:21,687 INFO L225 Difference]: With dead ends: 290 [2023-12-21 10:52:21,687 INFO L226 Difference]: Without dead ends: 288 [2023-12-21 10:52:21,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1672 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=576, Invalid=7796, Unknown=0, NotChecked=0, Total=8372 [2023-12-21 10:52:21,690 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 193 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 2838 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 2992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-12-21 10:52:21,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 463 Invalid, 2992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2838 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-12-21 10:52:21,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-12-21 10:52:21,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 238. [2023-12-21 10:52:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 154 states have internal predecessors, (166), 52 states have call successors, (52), 27 states have call predecessors, (52), 37 states have return successors, (70), 56 states have call predecessors, (70), 48 states have call successors, (70) [2023-12-21 10:52:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 288 transitions. [2023-12-21 10:52:21,734 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 288 transitions. Word has length 40 [2023-12-21 10:52:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:52:21,735 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 288 transitions. [2023-12-21 10:52:21,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 32 states have (on average 1.28125) internal successors, (41), 35 states have internal predecessors, (41), 11 states have call successors, (11), 6 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-21 10:52:21,735 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 288 transitions. [2023-12-21 10:52:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-21 10:52:21,735 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:52:21,735 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:52:21,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 10:52:21,943 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,SelfDestructingSolverStorable9 [2023-12-21 10:52:21,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:52:21,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:52:21,944 INFO L85 PathProgramCache]: Analyzing trace with hash -2084396484, now seen corresponding path program 5 times [2023-12-21 10:52:21,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:52:21,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693659479] [2023-12-21 10:52:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:52:21,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:52:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:52:22,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:52:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-12-21 11:02:05,257 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 11:02:05,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-21 11:02:05,512 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Termination requested (timeout or resource limit) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkResolutionNode(Interpolator.java:275) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:152) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:869) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:793) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:352) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:283) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:164) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:379) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-21 11:02:05,534 INFO L158 Benchmark]: Toolchain (without parser) took 865752.06ms. Allocated memory was 284.2MB in the beginning and 621.8MB in the end (delta: 337.6MB). Free memory was 234.1MB in the beginning and 174.3MB in the end (delta: 59.9MB). Peak memory consumption was 430.0MB. Max. memory is 8.0GB. [2023-12-21 11:02:05,534 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 176.2MB. Free memory is still 123.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 11:02:05,534 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.47ms. Allocated memory is still 284.2MB. Free memory was 234.1MB in the beginning and 220.5MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-21 11:02:05,534 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.91ms. Allocated memory is still 284.2MB. Free memory was 220.5MB in the beginning and 219.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 11:02:05,534 INFO L158 Benchmark]: Boogie Preprocessor took 53.09ms. Allocated memory is still 284.2MB. Free memory was 219.0MB in the beginning and 215.8MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-21 11:02:05,534 INFO L158 Benchmark]: RCFGBuilder took 391.68ms. Allocated memory is still 284.2MB. Free memory was 215.8MB in the beginning and 188.5MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2023-12-21 11:02:05,534 INFO L158 Benchmark]: TraceAbstraction took 865043.12ms. Allocated memory was 284.2MB in the beginning and 621.8MB in the end (delta: 337.6MB). Free memory was 188.0MB in the beginning and 174.3MB in the end (delta: 13.7MB). Peak memory consumption was 383.9MB. Max. memory is 8.0GB. [2023-12-21 11:02:05,535 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 176.2MB. Free memory is still 123.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 218.47ms. Allocated memory is still 284.2MB. Free memory was 234.1MB in the beginning and 220.5MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 41.91ms. Allocated memory is still 284.2MB. Free memory was 220.5MB in the beginning and 219.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 53.09ms. Allocated memory is still 284.2MB. Free memory was 219.0MB in the beginning and 215.8MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 391.68ms. Allocated memory is still 284.2MB. Free memory was 215.8MB in the beginning and 188.5MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. * TraceAbstraction took 865043.12ms. Allocated memory was 284.2MB in the beginning and 621.8MB in the end (delta: 337.6MB). Free memory was 188.0MB in the beginning and 174.3MB in the end (delta: 13.7MB). Peak memory consumption was 383.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Termination requested (timeout or resource limit) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Termination requested (timeout or resource limit): de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkResolutionNode(Interpolator.java:275) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown