/usr/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 -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-fpi/ms3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:55:34,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:55:34,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:55:34,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 19:55:34,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:55:34,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:55:34,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:55:34,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:55:34,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:55:34,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:55:34,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:55:34,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:55:34,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:55:34,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:55:34,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:55:34,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:55:34,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:55:34,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:55:34,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:55:34,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:55:34,641 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 19:55:34,668 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:55:34,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:55:34,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:55:34,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:55:34,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:55:34,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:55:34,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:55:34,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:55:34,671 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:55:34,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:55:34,672 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:55:34,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:55:34,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:55:34,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:55:34,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:55:34,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:55:34,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:55:34,672 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:55:34,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:55:34,673 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:55:34,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:55:34,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:55:34,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:55:34,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:55:34,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:55:34,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:55:34,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:55:34,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:55:34,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:55:34,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:55:34,674 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:55:34,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:55:34,674 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:55:34,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:55:34,675 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:55:34,675 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:55:34,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:55:34,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:55:34,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:55:34,941 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:55:34,941 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:55:34,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ms3.c [2023-04-01 19:55:36,037 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:55:36,211 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:55:36,212 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms3.c [2023-04-01 19:55:36,216 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26c368756/b3260c88317e4f9cbc3c9e66d0623017/FLAG2a71db12d [2023-04-01 19:55:36,229 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26c368756/b3260c88317e4f9cbc3c9e66d0623017 [2023-04-01 19:55:36,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:55:36,233 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:55:36,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:55:36,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:55:36,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:55:36,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:55:36" (1/1) ... [2023-04-01 19:55:36,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23016de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:55:36, skipping insertion in model container [2023-04-01 19:55:36,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:55:36" (1/1) ... [2023-04-01 19:55:36,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:55:36,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:55:36,359 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms3.c[586,599] [2023-04-01 19:55:36,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:55:36,389 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:55:36,402 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms3.c[586,599] [2023-04-01 19:55:36,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:55:36,424 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:55:36,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:55:36 WrapperNode [2023-04-01 19:55:36,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:55:36,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:55:36,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:55:36,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:55:36,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:55:36" (1/1) ... [2023-04-01 19:55:36,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:55:36" (1/1) ... [2023-04-01 19:55:36,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:55:36" (1/1) ... [2023-04-01 19:55:36,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:55:36" (1/1) ... [2023-04-01 19:55:36,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:55:36" (1/1) ... [2023-04-01 19:55:36,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:55:36" (1/1) ... [2023-04-01 19:55:36,467 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:55:36" (1/1) ... [2023-04-01 19:55:36,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:55:36" (1/1) ... [2023-04-01 19:55:36,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:55:36,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:55:36,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:55:36,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:55:36,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:55:36" (1/1) ... [2023-04-01 19:55:36,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:55:36,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:55:36,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 19:55:36,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 19:55:36,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:55:36,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:55:36,551 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:55:36,551 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 19:55:36,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 19:55:36,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:55:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:55:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:55:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:55:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:55:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 19:55:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 19:55:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:55:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 19:55:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:55:36,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:55:36,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 19:55:36,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:55:36,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:55:36,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:55:36,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:55:36,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:55:36,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:55:36,635 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:55:36,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:55:36,833 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:55:36,838 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:55:36,839 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 19:55:36,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:55:36 BoogieIcfgContainer [2023-04-01 19:55:36,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:55:36,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:55:36,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:55:36,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:55:36,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:55:36" (1/3) ... [2023-04-01 19:55:36,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a602218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:55:36, skipping insertion in model container [2023-04-01 19:55:36,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:55:36" (2/3) ... [2023-04-01 19:55:36,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a602218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:55:36, skipping insertion in model container [2023-04-01 19:55:36,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:55:36" (3/3) ... [2023-04-01 19:55:36,880 INFO L112 eAbstractionObserver]: Analyzing ICFG ms3.c [2023-04-01 19:55:36,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:55:36,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:55:36,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:55:36,948 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=LoopsAndPotentialCycles, 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;@6ea83863, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:55:36,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:55:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:55:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 19:55:36,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:55:36,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:55:36,962 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:55:36,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:55:36,968 INFO L85 PathProgramCache]: Analyzing trace with hash 863653859, now seen corresponding path program 1 times [2023-04-01 19:55:36,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:55:36,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269755133] [2023-04-01 19:55:36,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:55:36,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:55:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:37,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:55:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:37,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:55:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:55:37,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:55:37,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269755133] [2023-04-01 19:55:37,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269755133] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:55:37,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:55:37,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 19:55:37,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291913227] [2023-04-01 19:55:37,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:55:37,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:55:37,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:55:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:55:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:55:37,304 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:55:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:55:37,403 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-04-01 19:55:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:55:37,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 19:55:37,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:55:37,411 INFO L225 Difference]: With dead ends: 54 [2023-04-01 19:55:37,411 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 19:55:37,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:55:37,419 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:55:37,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:55:37,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 19:55:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 19:55:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:55:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-01 19:55:37,458 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2023-04-01 19:55:37,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:55:37,459 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-01 19:55:37,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:55:37,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-01 19:55:37,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 19:55:37,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:55:37,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:55:37,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:55:37,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:55:37,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:55:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1121819297, now seen corresponding path program 1 times [2023-04-01 19:55:37,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:55:37,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769310246] [2023-04-01 19:55:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:55:37,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:55:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:37,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:55:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:37,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:55:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:55:37,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:55:37,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769310246] [2023-04-01 19:55:37,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769310246] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:55:37,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:55:37,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 19:55:37,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872699888] [2023-04-01 19:55:37,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:55:37,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 19:55:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:55:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 19:55:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 19:55:37,662 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-04-01 19:55:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:55:37,742 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-04-01 19:55:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 19:55:37,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 19:55:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:55:37,744 INFO L225 Difference]: With dead ends: 40 [2023-04-01 19:55:37,744 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 19:55:37,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:55:37,745 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:55:37,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 18 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:55:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 19:55:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-04-01 19:55:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:55:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-01 19:55:37,753 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2023-04-01 19:55:37,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:55:37,753 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-01 19:55:37,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-04-01 19:55:37,754 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-01 19:55:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 19:55:37,754 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:55:37,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:55:37,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 19:55:37,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:55:37,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:55:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash -667943349, now seen corresponding path program 1 times [2023-04-01 19:55:37,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:55:37,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433572431] [2023-04-01 19:55:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:55:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:55:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:38,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:55:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:38,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:55:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 19:55:38,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:55:38,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433572431] [2023-04-01 19:55:38,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433572431] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:55:38,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:55:38,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 19:55:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427076553] [2023-04-01 19:55:38,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:55:38,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 19:55:38,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:55:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 19:55:38,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:55:38,159 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-04-01 19:55:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:55:38,323 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-04-01 19:55:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 19:55:38,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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 26 [2023-04-01 19:55:38,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:55:38,324 INFO L225 Difference]: With dead ends: 37 [2023-04-01 19:55:38,324 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 19:55:38,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:55:38,326 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:55:38,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 55 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:55:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 19:55:38,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-04-01 19:55:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:55:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-01 19:55:38,331 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2023-04-01 19:55:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:55:38,332 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-01 19:55:38,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-04-01 19:55:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-01 19:55:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 19:55:38,333 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:55:38,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:55:38,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 19:55:38,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:55:38,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:55:38,334 INFO L85 PathProgramCache]: Analyzing trace with hash 750383777, now seen corresponding path program 1 times [2023-04-01 19:55:38,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:55:38,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998288254] [2023-04-01 19:55:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:55:38,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:55:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:38,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:55:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:38,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:55:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:55:38,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:55:38,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998288254] [2023-04-01 19:55:38,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998288254] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:55:38,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856352354] [2023-04-01 19:55:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:55:38,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:55:38,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:55:38,508 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) [2023-04-01 19:55:38,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 19:55:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:38,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 19:55:38,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:55:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:55:38,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:55:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:55:38,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856352354] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:55:38,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:55:38,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-04-01 19:55:38,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981563502] [2023-04-01 19:55:38,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:55:38,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 19:55:38,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:55:38,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 19:55:38,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:55:38,743 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:55:38,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:55:38,933 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-04-01 19:55:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 19:55:38,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-04-01 19:55:38,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:55:38,937 INFO L225 Difference]: With dead ends: 51 [2023-04-01 19:55:38,937 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 19:55:38,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-04-01 19:55:38,943 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:55:38,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 50 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:55:38,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 19:55:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2023-04-01 19:55:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:55:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-04-01 19:55:38,949 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2023-04-01 19:55:38,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:55:38,949 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-04-01 19:55:38,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:55:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-04-01 19:55:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 19:55:38,950 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:55:38,951 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-04-01 19:55:38,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 19:55:39,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:55:39,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:55:39,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:55:39,165 INFO L85 PathProgramCache]: Analyzing trace with hash 253872099, now seen corresponding path program 2 times [2023-04-01 19:55:39,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:55:39,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086308714] [2023-04-01 19:55:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:55:39,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:55:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:39,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:55:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:39,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:55:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:55:39,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:55:39,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086308714] [2023-04-01 19:55:39,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086308714] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:55:39,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987421228] [2023-04-01 19:55:39,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:55:39,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:55:39,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:55:39,936 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) [2023-04-01 19:55:39,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 19:55:40,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:55:40,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:55:40,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 19:55:40,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:55:40,245 INFO L350 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 [2023-04-01 19:55:40,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:55:40,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2023-04-01 19:55:41,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:55:41,080 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-04-01 19:55:41,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 44 [2023-04-01 19:55:41,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:55:41,272 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-04-01 19:55:41,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2023-04-01 19:55:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:55:41,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:55:41,914 INFO L350 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 98 treesize of output 90 [2023-04-01 19:55:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:55:42,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987421228] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:55:42,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:55:42,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 15] total 42 [2023-04-01 19:55:42,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982889809] [2023-04-01 19:55:42,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:55:42,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-01 19:55:42,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:55:42,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-01 19:55:42,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1510, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 19:55:42,055 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 42 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:55:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:55:47,696 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2023-04-01 19:55:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-04-01 19:55:47,698 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-04-01 19:55:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:55:47,700 INFO L225 Difference]: With dead ends: 91 [2023-04-01 19:55:47,700 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 19:55:47,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1200, Invalid=6810, Unknown=0, NotChecked=0, Total=8010 [2023-04-01 19:55:47,704 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 204 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:55:47,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 100 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 19:55:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 19:55:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2023-04-01 19:55:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:55:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-04-01 19:55:47,714 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2023-04-01 19:55:47,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:55:47,714 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-04-01 19:55:47,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:55:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-04-01 19:55:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 19:55:47,715 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:55:47,715 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:55:47,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 19:55:47,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:55:47,921 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:55:47,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:55:47,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1902000633, now seen corresponding path program 3 times [2023-04-01 19:55:47,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:55:47,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436954459] [2023-04-01 19:55:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:55:47,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:55:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:48,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:55:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:48,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:55:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:55:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:55:48,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:55:48,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436954459] [2023-04-01 19:55:48,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436954459] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:55:48,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740010181] [2023-04-01 19:55:48,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:55:48,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:55:48,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:55:48,956 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) [2023-04-01 19:55:48,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 19:55:49,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 19:55:49,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:55:49,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-01 19:55:49,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:55:49,230 INFO L350 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 13 treesize of output 9 [2023-04-01 19:55:49,335 INFO L350 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 23 treesize of output 22 [2023-04-01 19:55:49,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:55:49,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:55:49,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-04-01 19:55:49,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:55:49,577 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-04-01 19:55:49,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 51 [2023-04-01 19:55:49,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:55:49,785 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-04-01 19:55:49,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 63 [2023-04-01 19:55:52,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:55:52,038 INFO L321 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2023-04-01 19:55:52,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 21 [2023-04-01 19:55:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:55:52,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:56:04,922 WARN L223 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:56:05,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:56:05,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2113 treesize of output 2052 [2023-04-01 19:56:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:56:06,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740010181] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:56:06,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:56:06,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 19] total 56 [2023-04-01 19:56:06,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965031097] [2023-04-01 19:56:06,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:56:06,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-04-01 19:56:06,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:56:06,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-04-01 19:56:06,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=2714, Unknown=0, NotChecked=0, Total=3080 [2023-04-01 19:56:06,740 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 56 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 52 states have internal predecessors, (77), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:56:19,903 WARN L223 SmtUtils]: Spent 10.77s on a formula simplification. DAG size of input: 140 DAG size of output: 116 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:56:21,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:57:21,698 WARN L223 SmtUtils]: Spent 44.40s on a formula simplification. DAG size of input: 131 DAG size of output: 108 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:57:23,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:57:25,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:57:54,528 WARN L223 SmtUtils]: Spent 24.79s on a formula simplification. DAG size of input: 94 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:57:57,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:57:59,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:58:03,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:58:11,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:58:48,061 WARN L223 SmtUtils]: Spent 30.73s on a formula simplification. DAG size of input: 142 DAG size of output: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:58:50,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:59:09,901 WARN L223 SmtUtils]: Spent 14.13s on a formula simplification. DAG size of input: 145 DAG size of output: 121 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:59:17,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:59:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:59:18,731 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2023-04-01 19:59:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-04-01 19:59:18,731 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 52 states have internal predecessors, (77), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2023-04-01 19:59:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:59:18,733 INFO L225 Difference]: With dead ends: 111 [2023-04-01 19:59:18,733 INFO L226 Difference]: Without dead ends: 87 [2023-04-01 19:59:18,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4191 ImplicationChecksByTransitivity, 186.0s TimeCoverageRelationStatistics Valid=2212, Invalid=12542, Unknown=8, NotChecked=0, Total=14762 [2023-04-01 19:59:18,737 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 216 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 182 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:59:18,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 109 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1022 Invalid, 9 Unknown, 0 Unchecked, 21.3s Time] [2023-04-01 19:59:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-04-01 19:59:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2023-04-01 19:59:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 74 states have internal predecessors, (87), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:59:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2023-04-01 19:59:18,758 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 36 [2023-04-01 19:59:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:59:18,758 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2023-04-01 19:59:18,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 52 states have internal predecessors, (77), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:59:18,759 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2023-04-01 19:59:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 19:59:18,760 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:59:18,760 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:59:18,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 19:59:18,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:59:18,965 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:59:18,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:59:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1758194727, now seen corresponding path program 4 times [2023-04-01 19:59:18,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:59:18,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924572203] [2023-04-01 19:59:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:59:18,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:59:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:59:20,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:59:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:59:20,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:59:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:59:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:59:20,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:59:20,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924572203] [2023-04-01 19:59:20,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924572203] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:59:20,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668608641] [2023-04-01 19:59:20,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:59:20,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:59:20,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:59:20,540 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) [2023-04-01 19:59:20,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 19:59:20,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:59:20,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:59:20,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 19:59:20,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:59:20,636 INFO L350 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 [2023-04-01 19:59:20,767 INFO L350 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 63 treesize of output 53 [2023-04-01 19:59:20,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:59:20,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 94 [2023-04-01 19:59:34,962 WARN L223 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 741 DAG size of output: 181 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:59:39,310 INFO L321 Elim1Store]: treesize reduction 647, result has 67.9 percent of original size [2023-04-01 19:59:39,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 231 case distinctions, treesize of input 536 treesize of output 1662