/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 04:03:34,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 04:03:34,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 04:03:34,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 04:03:34,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 04:03:34,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 04:03:34,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 04:03:34,618 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 04:03:34,631 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 04:03:34,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 04:03:34,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 04:03:34,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 04:03:34,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 04:03:34,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 04:03:34,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 04:03:34,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 04:03:34,633 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 04:03:34,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 04:03:34,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 04:03:34,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 04:03:34,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 04:03:34,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 04:03:34,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 04:03:34,633 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 04:03:34,633 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 04:03:34,633 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 04:03:34,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 04:03:34,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 04:03:34,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 04:03:34,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 04:03:34,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 04:03:34,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:03:34,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 04:03:34,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 04:03:34,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 04:03:34,634 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 04:03:34,634 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 04:03:34,634 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 04:03:34,634 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 04:03:34,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 04:03:34,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 04:03:34,635 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 04:03:34,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 04:03:34,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 04:03:34,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 04:03:34,835 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 04:03:34,838 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 04:03:34,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn3.c [2022-01-10 04:03:34,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e79a18599/07336b88e88b4a5b8034686ea2a19215/FLAG232fc2b77 [2022-01-10 04:03:35,261 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 04:03:35,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3.c [2022-01-10 04:03:35,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e79a18599/07336b88e88b4a5b8034686ea2a19215/FLAG232fc2b77 [2022-01-10 04:03:35,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e79a18599/07336b88e88b4a5b8034686ea2a19215 [2022-01-10 04:03:35,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 04:03:35,277 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 04:03:35,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 04:03:35,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 04:03:35,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 04:03:35,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:03:35" (1/1) ... [2022-01-10 04:03:35,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6edd483d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35, skipping insertion in model container [2022-01-10 04:03:35,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:03:35" (1/1) ... [2022-01-10 04:03:35,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 04:03:35,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 04:03:35,428 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3.c[589,602] [2022-01-10 04:03:35,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:03:35,455 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 04:03:35,464 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3.c[589,602] [2022-01-10 04:03:35,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:03:35,480 INFO L208 MainTranslator]: Completed translation [2022-01-10 04:03:35,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35 WrapperNode [2022-01-10 04:03:35,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 04:03:35,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 04:03:35,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 04:03:35,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 04:03:35,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35" (1/1) ... [2022-01-10 04:03:35,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35" (1/1) ... [2022-01-10 04:03:35,508 INFO L137 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2022-01-10 04:03:35,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 04:03:35,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 04:03:35,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 04:03:35,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 04:03:35,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35" (1/1) ... [2022-01-10 04:03:35,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35" (1/1) ... [2022-01-10 04:03:35,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35" (1/1) ... [2022-01-10 04:03:35,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35" (1/1) ... [2022-01-10 04:03:35,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35" (1/1) ... [2022-01-10 04:03:35,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35" (1/1) ... [2022-01-10 04:03:35,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35" (1/1) ... [2022-01-10 04:03:35,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 04:03:35,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 04:03:35,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 04:03:35,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 04:03:35,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35" (1/1) ... [2022-01-10 04:03:35,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:03:35,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 04:03:35,584 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) [2022-01-10 04:03:35,602 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 [2022-01-10 04:03:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 04:03:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 04:03:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-01-10 04:03:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 04:03:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 04:03:35,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 04:03:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-01-10 04:03:35,666 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 04:03:35,667 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 04:03:35,908 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 04:03:35,913 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 04:03:35,913 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 04:03:35,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:03:35 BoogieIcfgContainer [2022-01-10 04:03:35,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 04:03:35,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 04:03:35,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 04:03:35,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 04:03:35,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:03:35" (1/3) ... [2022-01-10 04:03:35,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2707cc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:03:35, skipping insertion in model container [2022-01-10 04:03:35,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:35" (2/3) ... [2022-01-10 04:03:35,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2707cc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:03:35, skipping insertion in model container [2022-01-10 04:03:35,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:03:35" (3/3) ... [2022-01-10 04:03:35,943 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn3.c [2022-01-10 04:03:35,946 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 04:03:35,947 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 04:03:35,981 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 04:03:35,986 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 04:03:35,986 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 04:03:35,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:36,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 04:03:36,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:03:36,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:03:36,001 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:03:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:03:36,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2022-01-10 04:03:36,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:03:36,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151474865] [2022-01-10 04:03:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:03:36,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:03:36,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:03:36,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:03:36,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 04:03:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:03:36,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 04:03:36,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:03:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:03:36,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:03:36,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:03:36,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151474865] [2022-01-10 04:03:36,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151474865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:03:36,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:03:36,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:03:36,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391445451] [2022-01-10 04:03:36,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:03:36,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 04:03:36,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:03:36,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 04:03:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 04:03:36,181 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:36,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:03:36,193 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-01-10 04:03:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 04:03:36,196 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 04:03:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:03:36,208 INFO L225 Difference]: With dead ends: 42 [2022-01-10 04:03:36,208 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 04:03:36,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 04:03:36,215 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:03:36,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:03:36,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 04:03:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-10 04:03:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-10 04:03:36,237 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-01-10 04:03:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:03:36,237 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-10 04:03:36,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-10 04:03:36,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 04:03:36,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:03:36,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:03:36,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 04:03:36,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:03:36,448 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:03:36,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:03:36,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2022-01-10 04:03:36,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:03:36,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319214302] [2022-01-10 04:03:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:03:36,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:03:36,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:03:36,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:03:36,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 04:03:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:03:36,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 04:03:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:03:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:03:36,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:03:36,718 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:03:36,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319214302] [2022-01-10 04:03:36,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319214302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:03:36,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:03:36,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 04:03:36,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247844997] [2022-01-10 04:03:36,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:03:36,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 04:03:36,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:03:36,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 04:03:36,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 04:03:36,729 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:03:36,996 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-01-10 04:03:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 04:03:37,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 04:03:37,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:03:37,006 INFO L225 Difference]: With dead ends: 45 [2022-01-10 04:03:37,006 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 04:03:37,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 04:03:37,007 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 04:03:37,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 15 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 04:03:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 04:03:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-01-10 04:03:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-10 04:03:37,012 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-01-10 04:03:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:03:37,012 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-10 04:03:37,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:37,013 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-10 04:03:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 04:03:37,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:03:37,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:03:37,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 04:03:37,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:03:37,223 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:03:37,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:03:37,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2022-01-10 04:03:37,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:03:37,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554958693] [2022-01-10 04:03:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:03:37,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:03:37,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:03:37,226 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:03:37,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 04:03:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:03:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 04:03:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:03:37,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:37,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:37,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-01-10 04:03:37,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 04:03:37,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 53 treesize of output 29 [2022-01-10 04:03:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 04:03:37,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:03:37,587 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:03:37,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554958693] [2022-01-10 04:03:37,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554958693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:03:37,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:03:37,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 04:03:37,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772294401] [2022-01-10 04:03:37,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:03:37,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 04:03:37,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:03:37,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 04:03:37,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 04:03:37,592 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:37,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:03:37,944 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-01-10 04:03:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 04:03:37,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 04:03:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:03:37,946 INFO L225 Difference]: With dead ends: 40 [2022-01-10 04:03:37,946 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 04:03:37,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 04:03:37,947 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 04:03:37,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 61 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 04:03:37,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 04:03:37,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-01-10 04:03:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-01-10 04:03:37,951 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2022-01-10 04:03:37,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:03:37,951 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-01-10 04:03:37,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-01-10 04:03:37,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 04:03:37,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:03:37,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:03:37,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 04:03:38,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:03:38,161 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:03:38,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:03:38,162 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2022-01-10 04:03:38,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:03:38,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304073835] [2022-01-10 04:03:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:03:38,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:03:38,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:03:38,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:03:38,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 04:03:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:03:38,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 04:03:38,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:03:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:03:38,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:03:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:03:38,660 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:03:38,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304073835] [2022-01-10 04:03:38,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304073835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:03:38,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:03:38,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2022-01-10 04:03:38,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888460958] [2022-01-10 04:03:38,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:03:38,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 04:03:38,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:03:38,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 04:03:38,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-01-10 04:03:38,661 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:03:39,366 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2022-01-10 04:03:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 04:03:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-10 04:03:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:03:39,367 INFO L225 Difference]: With dead ends: 75 [2022-01-10 04:03:39,367 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 04:03:39,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-01-10 04:03:39,369 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 143 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 04:03:39,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 63 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 04:03:39,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 04:03:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2022-01-10 04:03:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-10 04:03:39,372 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2022-01-10 04:03:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:03:39,373 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-10 04:03:39,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:39,373 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-10 04:03:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 04:03:39,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:03:39,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:03:39,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 04:03:39,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:03:39,582 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:03:39,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:03:39,582 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2022-01-10 04:03:39,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:03:39,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495075098] [2022-01-10 04:03:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:03:39,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:03:39,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:03:39,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:03:39,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 04:03:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:03:39,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 04:03:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:03:39,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:39,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-01-10 04:03:39,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:39,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:39,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:39,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:39,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:39,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:39,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 04:03:39,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2022-01-10 04:03:39,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 04:03:39,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 53 treesize of output 29 [2022-01-10 04:03:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 04:03:39,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:03:41,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 67 treesize of output 63 [2022-01-10 04:03:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 04:03:42,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:03:42,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495075098] [2022-01-10 04:03:42,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495075098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:03:42,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:03:42,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 04:03:42,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683678065] [2022-01-10 04:03:42,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:03:42,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 04:03:42,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:03:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 04:03:42,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-10 04:03:42,216 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:03:47,901 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-01-10 04:03:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 04:03:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 04:03:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:03:47,913 INFO L225 Difference]: With dead ends: 78 [2022-01-10 04:03:47,913 INFO L226 Difference]: Without dead ends: 76 [2022-01-10 04:03:47,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-01-10 04:03:47,914 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:03:47,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 95 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 115 Invalid, 0 Unknown, 71 Unchecked, 1.0s Time] [2022-01-10 04:03:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-10 04:03:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2022-01-10 04:03:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-01-10 04:03:47,926 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 24 [2022-01-10 04:03:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:03:47,927 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-01-10 04:03:47,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-01-10 04:03:47,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 04:03:47,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:03:47,927 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:03:47,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 04:03:48,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:03:48,147 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:03:48,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:03:48,148 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2022-01-10 04:03:48,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:03:48,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319165738] [2022-01-10 04:03:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:03:48,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:03:48,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:03:48,151 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:03:48,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 04:03:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:03:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 04:03:48,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:03:48,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-10 04:03:48,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:48,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:48,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-01-10 04:03:48,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:48,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:48,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:48,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:48,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:48,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:48,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-01-10 04:03:48,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:48,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:48,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:48,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-01-10 04:03:49,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:49,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:49,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:49,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:49,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:49,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:49,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:49,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:03:49,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:03:49,165 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-10 04:03:49,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 79 [2022-01-10 04:03:49,634 INFO L353 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-01-10 04:03:49,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 67 [2022-01-10 04:03:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:03:49,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:03:57,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:04:09,801 WARN L228 SmtUtils]: Spent 11.98s on a formula simplification. DAG size of input: 63 DAG size of output: 36 (called from [L 350] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-01-10 04:04:09,803 INFO L353 Elim1Store]: treesize reduction 203, result has 23.7 percent of original size [2022-01-10 04:04:09,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 261318754 treesize of output 131295392