/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/res1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 04:06:10,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 04:06:10,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 04:06:10,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 04:06:10,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 04:06:10,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 04:06:10,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 04:06:10,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 04:06:10,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 04:06:10,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 04:06:10,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 04:06:10,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 04:06:10,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 04:06:10,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 04:06:10,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 04:06:10,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 04:06:10,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 04:06:10,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 04:06:10,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 04:06:10,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 04:06:10,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 04:06:10,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 04:06:10,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 04:06:10,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 04:06:10,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 04:06:10,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 04:06:10,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 04:06:10,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 04:06:10,659 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 04:06:10,677 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 04:06:10,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 04:06:10,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 04:06:10,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 04:06:10,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 04:06:10,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 04:06:10,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 04:06:10,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 04:06:10,679 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 04:06:10,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 04:06:10,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 04:06:10,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 04:06:10,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 04:06:10,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 04:06:10,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 04:06:10,680 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 04:06:10,680 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 04:06:10,680 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 04:06:10,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 04:06:10,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 04:06:10,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 04:06:10,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 04:06:10,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 04:06:10,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:06:10,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 04:06:10,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 04:06:10,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 04:06:10,681 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 04:06:10,681 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 04:06:10,681 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 04:06:10,681 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 04:06:10,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 04:06:10,681 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 04:06:10,682 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 04:06:10,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 04:06:10,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 04:06:10,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 04:06:10,883 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 04:06:10,893 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 04:06:10,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1.c [2022-01-10 04:06:10,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31d738383/f7b384c75501461da4b818b2e7684427/FLAGa7dc8e5a6 [2022-01-10 04:06:11,315 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 04:06:11,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res1.c [2022-01-10 04:06:11,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31d738383/f7b384c75501461da4b818b2e7684427/FLAGa7dc8e5a6 [2022-01-10 04:06:11,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31d738383/f7b384c75501461da4b818b2e7684427 [2022-01-10 04:06:11,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 04:06:11,334 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 04:06:11,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 04:06:11,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 04:06:11,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 04:06:11,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:06:11" (1/1) ... [2022-01-10 04:06:11,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13b30cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11, skipping insertion in model container [2022-01-10 04:06:11,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:06:11" (1/1) ... [2022-01-10 04:06:11,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 04:06:11,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 04:06:11,463 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/res1.c[587,600] [2022-01-10 04:06:11,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:06:11,532 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 04:06:11,550 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/res1.c[587,600] [2022-01-10 04:06:11,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:06:11,567 INFO L208 MainTranslator]: Completed translation [2022-01-10 04:06:11,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11 WrapperNode [2022-01-10 04:06:11,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 04:06:11,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 04:06:11,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 04:06:11,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 04:06:11,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11" (1/1) ... [2022-01-10 04:06:11,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11" (1/1) ... [2022-01-10 04:06:11,613 INFO L137 Inliner]: procedures = 21, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 94 [2022-01-10 04:06:11,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 04:06:11,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 04:06:11,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 04:06:11,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 04:06:11,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11" (1/1) ... [2022-01-10 04:06:11,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11" (1/1) ... [2022-01-10 04:06:11,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11" (1/1) ... [2022-01-10 04:06:11,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11" (1/1) ... [2022-01-10 04:06:11,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11" (1/1) ... [2022-01-10 04:06:11,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11" (1/1) ... [2022-01-10 04:06:11,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11" (1/1) ... [2022-01-10 04:06:11,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 04:06:11,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 04:06:11,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 04:06:11,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 04:06:11,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11" (1/1) ... [2022-01-10 04:06:11,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:06:11,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 04:06:11,676 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 04:06:11,699 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 04:06:11,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 04:06:11,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 04:06:11,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 04:06:11,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-01-10 04:06:11,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 04:06:11,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 04:06:11,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 04:06:11,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 04:06:11,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-01-10 04:06:11,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 04:06:11,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 04:06:11,761 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 04:06:11,762 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 04:06:11,888 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 04:06:11,892 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 04:06:11,892 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-10 04:06:11,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:06:11 BoogieIcfgContainer [2022-01-10 04:06:11,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 04:06:11,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 04:06:11,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 04:06:11,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 04:06:11,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:06:11" (1/3) ... [2022-01-10 04:06:11,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70acfbad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:06:11, skipping insertion in model container [2022-01-10 04:06:11,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:06:11" (2/3) ... [2022-01-10 04:06:11,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70acfbad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:06:11, skipping insertion in model container [2022-01-10 04:06:11,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:06:11" (3/3) ... [2022-01-10 04:06:11,899 INFO L111 eAbstractionObserver]: Analyzing ICFG res1.c [2022-01-10 04:06:11,902 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 04:06:11,902 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 04:06:11,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 04:06:11,935 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 04:06:11,935 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 04:06:11,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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 04:06:11,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 04:06:11,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:06:11,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:06:11,949 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:06:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:06:11,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1202110748, now seen corresponding path program 1 times [2022-01-10 04:06:11,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:06:11,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119169315] [2022-01-10 04:06:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:06:11,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:06:11,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:06:11,966 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 04:06:11,998 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 04:06:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:06:12,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 04:06:12,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:06:12,111 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 04:06:12,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:06:12,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:06:12,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119169315] [2022-01-10 04:06:12,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119169315] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:06:12,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:06:12,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:06:12,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809374667] [2022-01-10 04:06:12,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:06:12,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 04:06:12,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:06:12,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 04:06:12,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 04:06:12,149 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 04:06:12,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:06:12,161 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-01-10 04:06:12,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 04:06:12,166 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 15 [2022-01-10 04:06:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:06:12,172 INFO L225 Difference]: With dead ends: 44 [2022-01-10 04:06:12,172 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 04:06:12,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 04:06:12,186 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 04:06:12,187 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 04:06:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 04:06:12,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-10 04:06:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 04:06:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-01-10 04:06:12,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2022-01-10 04:06:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:06:12,213 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-01-10 04:06:12,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 04:06:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-01-10 04:06:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 04:06:12,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:06:12,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:06:12,224 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 04:06:12,424 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 04:06:12,425 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:06:12,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:06:12,425 INFO L85 PathProgramCache]: Analyzing trace with hash -944124056, now seen corresponding path program 1 times [2022-01-10 04:06:12,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:06:12,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376556134] [2022-01-10 04:06:12,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:06:12,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:06:12,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:06:12,431 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 04:06:12,442 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 04:06:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:06:12,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 04:06:12,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:06:12,634 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 04:06:12,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:06:12,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:06:12,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376556134] [2022-01-10 04:06:12,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376556134] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:06:12,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:06:12,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 04:06:12,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820126008] [2022-01-10 04:06:12,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:06:12,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 04:06:12,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:06:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 04:06:12,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 04:06:12,637 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 04:06:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:06:12,784 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-01-10 04:06:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 04:06:12,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2022-01-10 04:06:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:06:12,786 INFO L225 Difference]: With dead ends: 41 [2022-01-10 04:06:12,786 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 04:06:12,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 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 04:06:12,787 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 04:06:12,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 10 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 04:06:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 04:06:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-01-10 04:06:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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 04:06:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-10 04:06:12,793 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2022-01-10 04:06:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:06:12,794 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-10 04:06:12,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 04:06:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-10 04:06:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 04:06:12,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:06:12,794 INFO L514 BasicCegarLoop]: 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] [2022-01-10 04:06:12,804 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 04:06:13,004 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 04:06:13,005 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:06:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:06:13,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1401448688, now seen corresponding path program 1 times [2022-01-10 04:06:13,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:06:13,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876698155] [2022-01-10 04:06:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:06:13,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:06:13,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:06:13,011 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 04:06:13,012 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 04:06:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:06:13,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-10 04:06:13,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:06:13,286 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 04:06:13,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2022-01-10 04:06:13,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:13,337 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-01-10 04:06:13,338 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 1 case distinctions, treesize of input 18 treesize of output 18 [2022-01-10 04:06:13,496 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-10 04:06:13,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-01-10 04:06:13,970 INFO L353 Elim1Store]: treesize reduction 56, result has 44.6 percent of original size [2022-01-10 04:06:13,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 78 [2022-01-10 04:06:14,697 INFO L353 Elim1Store]: treesize reduction 165, result has 19.5 percent of original size [2022-01-10 04:06:14,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 77 [2022-01-10 04:06:15,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:15,166 INFO L353 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-01-10 04:06:15,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 73 [2022-01-10 04:06:15,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:15,663 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-10 04:06:15,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 75 [2022-01-10 04:06:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:06:15,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:06:20,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:20,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:20,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:20,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:20,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:20,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:20,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:20,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:20,879 INFO L353 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-01-10 04:06:20,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 1098 treesize of output 394 [2022-01-10 04:06:20,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:20,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:20,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:20,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 394 treesize of output 370 [2022-01-10 04:06:20,911 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-10 04:06:20,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 528 treesize of output 522 [2022-01-10 04:06:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:06:21,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:06:21,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876698155] [2022-01-10 04:06:21,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876698155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:06:21,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:06:21,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 04:06:21,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031944119] [2022-01-10 04:06:21,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:06:21,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 04:06:21,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:06:21,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 04:06:21,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-01-10 04:06:21,427 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 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 04:06:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:06:26,278 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-01-10 04:06:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 04:06:26,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 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 23 [2022-01-10 04:06:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:06:26,280 INFO L225 Difference]: With dead ends: 58 [2022-01-10 04:06:26,280 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 04:06:26,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-01-10 04:06:26,282 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 04:06:26,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 98 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 48 Unchecked, 1.3s Time] [2022-01-10 04:06:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 04:06:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2022-01-10 04:06:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 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 04:06:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-01-10 04:06:26,295 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 23 [2022-01-10 04:06:26,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:06:26,295 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-01-10 04:06:26,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 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 04:06:26,296 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-01-10 04:06:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 04:06:26,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:06:26,297 INFO L514 BasicCegarLoop]: 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] [2022-01-10 04:06:26,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 04:06:26,505 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 04:06:26,505 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:06:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:06:26,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1774307726, now seen corresponding path program 2 times [2022-01-10 04:06:26,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:06:26,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734672371] [2022-01-10 04:06:26,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 04:06:26,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:06:26,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:06:26,508 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 04:06:26,510 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 04:06:26,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 04:06:26,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:06:26,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 04:06:26,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:06:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 04:06:26,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:06:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 04:06:26,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:06:26,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734672371] [2022-01-10 04:06:26,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734672371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:06:26,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:06:26,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2022-01-10 04:06:26,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502671412] [2022-01-10 04:06:26,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:06:26,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 04:06:26,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:06:26,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 04:06:26,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-01-10 04:06:26,984 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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 04:06:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:06:27,541 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2022-01-10 04:06:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 04:06:27,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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 25 [2022-01-10 04:06:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:06:27,546 INFO L225 Difference]: With dead ends: 88 [2022-01-10 04:06:27,546 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 04:06:27,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-01-10 04:06:27,548 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 93 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 04:06:27,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 28 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 04:06:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 04:06:27,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-01-10 04:06:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 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 04:06:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-01-10 04:06:27,559 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2022-01-10 04:06:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:06:27,559 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-01-10 04:06:27,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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 04:06:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-01-10 04:06:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 04:06:27,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:06:27,560 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, 1, 1, 1] [2022-01-10 04:06:27,570 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 04:06:27,770 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 04:06:27,770 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:06:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:06:27,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1964080588, now seen corresponding path program 3 times [2022-01-10 04:06:27,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:06:27,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116903666] [2022-01-10 04:06:27,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 04:06:27,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:06:27,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:06:27,776 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 04:06:27,777 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 04:06:27,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 04:06:27,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:06:27,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 04:06:27,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:06:28,090 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 04:06:28,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:06:28,290 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 04:06:28,290 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:06:28,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116903666] [2022-01-10 04:06:28,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116903666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:06:28,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:06:28,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2022-01-10 04:06:28,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3971411] [2022-01-10 04:06:28,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:06:28,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 04:06:28,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:06:28,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 04:06:28,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-10 04:06:28,292 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 04:06:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:06:28,948 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2022-01-10 04:06:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 04:06:28,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 27 [2022-01-10 04:06:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:06:28,949 INFO L225 Difference]: With dead ends: 90 [2022-01-10 04:06:28,949 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 04:06:28,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2022-01-10 04:06:28,952 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 181 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 04:06:28,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 25 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 04:06:28,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 04:06:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2022-01-10 04:06:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 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 04:06:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2022-01-10 04:06:28,959 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 27 [2022-01-10 04:06:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:06:28,959 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2022-01-10 04:06:28,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 04:06:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2022-01-10 04:06:28,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 04:06:28,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:06:28,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:06:28,992 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 04:06:29,160 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 04:06:29,161 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:06:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:06:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash 666081912, now seen corresponding path program 4 times [2022-01-10 04:06:29,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:06:29,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849867093] [2022-01-10 04:06:29,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 04:06:29,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:06:29,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:06:29,164 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 04:06:29,164 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 04:06:29,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 04:06:29,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:06:29,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-10 04:06:29,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:06:29,422 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 04:06:29,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2022-01-10 04:06:29,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:29,458 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-01-10 04:06:29,458 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 1 case distinctions, treesize of input 18 treesize of output 18 [2022-01-10 04:06:29,642 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-10 04:06:29,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-01-10 04:06:29,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:29,924 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-10 04:06:29,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 50 [2022-01-10 04:06:30,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:30,478 INFO L353 Elim1Store]: treesize reduction 56, result has 44.6 percent of original size [2022-01-10 04:06:30,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 93 [2022-01-10 04:06:31,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:31,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:31,195 INFO L353 Elim1Store]: treesize reduction 107, result has 21.9 percent of original size [2022-01-10 04:06:31,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 93 [2022-01-10 04:06:32,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:32,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:32,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:32,159 INFO L353 Elim1Store]: treesize reduction 308, result has 14.4 percent of original size [2022-01-10 04:06:32,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 131 treesize of output 109 [2022-01-10 04:06:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:32,863 INFO L353 Elim1Store]: treesize reduction 309, result has 14.2 percent of original size [2022-01-10 04:06:32,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 135 treesize of output 116 [2022-01-10 04:06:33,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:33,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:33,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:33,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:33,658 INFO L353 Elim1Store]: treesize reduction 322, result has 10.6 percent of original size [2022-01-10 04:06:33,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 177 treesize of output 127 [2022-01-10 04:06:34,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:34,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:34,235 INFO L353 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-01-10 04:06:34,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 231 treesize of output 171 [2022-01-10 04:06:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:35,001 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-10 04:06:35,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 225 [2022-01-10 04:06:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:06:35,135 INFO L328 TraceCheckSpWp]: Computing backward predicates...