/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:13:04,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:13:04,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:13:04,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:13:04,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:13:04,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:13:04,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:13:04,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:13:04,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:13:04,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:13:04,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:13:04,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:13:04,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:13:04,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:13:04,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:13:04,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:13:04,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:13:04,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:13:04,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:13:04,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:13:04,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:13:04,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:13:04,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:13:04,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:13:04,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 22:13:04,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 22:13:04,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 22:13:04,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 22:13:04,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 22:13:04,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 22:13:04,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 22:13:04,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 22:13:04,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 22:13:04,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 22:13:04,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 22:13:04,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 22:13:04,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 22:13:04,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 22:13:04,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:13:04,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:13:04,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:13:04,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:13:04,288 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:13:04,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:13:04,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:13:04,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:13:04,294 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:13:04,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:13:04,294 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:13:04,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:13:04,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:13:04,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:13:04,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:13:04,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:13:04,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:13:04,295 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:13:04,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:13:04,296 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:13:04,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:13:04,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:13:04,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:13:04,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:13:04,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:13:04,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:13:04,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:13:04,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:13:04,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:13:04,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:13:04,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:04,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:13:04,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:13:04,299 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:13:04,625 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:13:04,644 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:13:04,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:13:04,650 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:13:04,653 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:13:04,654 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-20 22:13:04,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/100fa34e9/89e3397d0f1a4db8a6287c8e5eeffc27/FLAGa4ea49d67 [2020-07-20 22:13:05,231 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:13:05,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-20 22:13:05,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/100fa34e9/89e3397d0f1a4db8a6287c8e5eeffc27/FLAGa4ea49d67 [2020-07-20 22:13:05,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/100fa34e9/89e3397d0f1a4db8a6287c8e5eeffc27 [2020-07-20 22:13:05,611 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:13:05,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:13:05,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:13:05,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:13:05,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:13:05,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:13:05" (1/1) ... [2020-07-20 22:13:05,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@310fa0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:05, skipping insertion in model container [2020-07-20 22:13:05,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:13:05" (1/1) ... [2020-07-20 22:13:05,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:13:05,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:13:05,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:13:05,828 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:13:05,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:13:05,868 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:13:05,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:05 WrapperNode [2020-07-20 22:13:05,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:13:05,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:13:05,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:13:05,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:13:05,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:05" (1/1) ... [2020-07-20 22:13:05,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:05" (1/1) ... [2020-07-20 22:13:05,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:05" (1/1) ... [2020-07-20 22:13:05,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:05" (1/1) ... [2020-07-20 22:13:05,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:05" (1/1) ... [2020-07-20 22:13:06,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:05" (1/1) ... [2020-07-20 22:13:06,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:05" (1/1) ... [2020-07-20 22:13:06,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:13:06,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:13:06,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:13:06,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:13:06,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:13:06,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:13:06,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:13:06,068 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:13:06,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:13:06,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:13:06,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:13:06,068 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:13:06,068 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:13:06,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:13:06,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:13:06,069 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 22:13:06,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:13:06,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 22:13:06,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:13:06,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:13:06,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:13:06,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:13:06,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:13:06,400 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:13:06,403 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 22:13:06,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:13:06 BoogieIcfgContainer [2020-07-20 22:13:06,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:13:06,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:13:06,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:13:06,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:13:06,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:13:05" (1/3) ... [2020-07-20 22:13:06,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a79a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:13:06, skipping insertion in model container [2020-07-20 22:13:06,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:05" (2/3) ... [2020-07-20 22:13:06,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a79a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:13:06, skipping insertion in model container [2020-07-20 22:13:06,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:13:06" (3/3) ... [2020-07-20 22:13:06,417 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-07-20 22:13:06,428 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:13:06,435 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:13:06,447 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:13:06,469 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:13:06,469 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:13:06,469 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:13:06,469 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:13:06,470 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:13:06,470 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:13:06,470 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:13:06,470 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:13:06,488 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 22:13:06,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 22:13:06,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:13:06,497 INFO L422 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] [2020-07-20 22:13:06,498 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:13:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:13:06,504 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-20 22:13:06,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:13:06,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673236298] [2020-07-20 22:13:06,514 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:06,637 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:13:06,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:13:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:13:06,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:13:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:13:06,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:13:06,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673236298] [2020-07-20 22:13:06,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:13:06,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:13:06,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668467076] [2020-07-20 22:13:06,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:13:06,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:13:06,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:13:06,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:13:06,744 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-07-20 22:13:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:13:06,882 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2020-07-20 22:13:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:13:06,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 22:13:06,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:13:06,895 INFO L225 Difference]: With dead ends: 76 [2020-07-20 22:13:06,895 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 22:13:06,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:13:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 22:13:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-20 22:13:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 22:13:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 22:13:06,950 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-20 22:13:06,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:13:06,950 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 22:13:06,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:13:06,951 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 22:13:06,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 22:13:06,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:13:06,952 INFO L422 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, 1, 1, 1, 1, 1] [2020-07-20 22:13:07,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:07,169 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:13:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:13:07,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-20 22:13:07,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:13:07,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947004009] [2020-07-20 22:13:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:07,240 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:13:07,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:13:07,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 22:13:07,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:13:07,313 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 22:13:07,314 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:13:07,321 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:13:07,321 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:13:07,322 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-20 22:13:07,374 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:13:07,375 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-20 22:13:07,376 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 22:13:07,395 INFO L624 ElimStorePlain]: treesize reduction 12, result has 36.8 percent of original size [2020-07-20 22:13:07,396 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:13:07,396 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:7 [2020-07-20 22:13:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:13:07,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:13:07,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:13:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:13:07,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947004009] [2020-07-20 22:13:07,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 22:13:07,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 13 [2020-07-20 22:13:07,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221545030] [2020-07-20 22:13:07,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 22:13:07,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:13:07,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 22:13:07,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 22:13:07,581 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-20 22:13:07,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:13:07,810 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-20 22:13:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 22:13:07,811 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-20 22:13:07,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:13:07,813 INFO L225 Difference]: With dead ends: 52 [2020-07-20 22:13:07,813 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 22:13:07,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-07-20 22:13:07,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 22:13:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-20 22:13:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 22:13:07,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-20 22:13:07,826 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-20 22:13:07,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:13:07,827 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-20 22:13:07,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 22:13:07,827 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-20 22:13:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 22:13:07,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:13:07,828 INFO L422 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, 1, 1, 1, 1, 1] [2020-07-20 22:13:08,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:08,044 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:13:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:13:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-20 22:13:08,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:13:08,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311926900] [2020-07-20 22:13:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:08,090 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:13:08,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:13:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:13:08,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:13:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:13:08,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:13:08,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311926900] [2020-07-20 22:13:08,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:13:08,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:13:08,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643020485] [2020-07-20 22:13:08,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:13:08,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:13:08,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:13:08,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:13:08,109 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 3 states. [2020-07-20 22:13:08,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:13:08,150 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-20 22:13:08,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:13:08,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-20 22:13:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:13:08,153 INFO L225 Difference]: With dead ends: 74 [2020-07-20 22:13:08,153 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 22:13:08,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:13:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 22:13:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-20 22:13:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 22:13:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-20 22:13:08,162 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-07-20 22:13:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:13:08,163 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-20 22:13:08,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:13:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-20 22:13:08,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 22:13:08,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:13:08,165 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:13:08,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:08,379 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:13:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:13:08,379 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-20 22:13:08,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:13:08,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972713096] [2020-07-20 22:13:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:09,422 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:13:09,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:13:09,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:13:09,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:13:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:13:09,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:13:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:13:09,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972713096] [2020-07-20 22:13:09,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:13:09,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 22:13:09,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681272173] [2020-07-20 22:13:09,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 22:13:09,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:13:09,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 22:13:09,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:13:09,559 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 9 states. [2020-07-20 22:13:09,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:13:09,772 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-07-20 22:13:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 22:13:09,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-07-20 22:13:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:13:09,774 INFO L225 Difference]: With dead ends: 91 [2020-07-20 22:13:09,775 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 22:13:09,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:13:09,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 22:13:09,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-20 22:13:09,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 22:13:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-20 22:13:09,795 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-20 22:13:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:13:09,795 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-20 22:13:09,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 22:13:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-20 22:13:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 22:13:09,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:13:09,797 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:13:10,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:10,012 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:13:10,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:13:10,012 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-20 22:13:10,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:13:10,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295059750] [2020-07-20 22:13:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:10,102 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:13:10,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 22:13:10,103 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:13:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 22:13:10,126 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:13:10,156 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 22:13:10,156 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 22:13:10,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:10,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:13:10 BoogieIcfgContainer [2020-07-20 22:13:10,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:13:10,449 INFO L168 Benchmark]: Toolchain (without parser) took 4837.04 ms. Allocated memory was 138.9 MB in the beginning and 236.5 MB in the end (delta: 97.5 MB). Free memory was 103.3 MB in the beginning and 94.6 MB in the end (delta: 8.7 MB). Peak memory consumption was 106.2 MB. Max. memory is 7.1 GB. [2020-07-20 22:13:10,450 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 22:13:10,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.52 ms. Allocated memory is still 138.9 MB. Free memory was 102.9 MB in the beginning and 92.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:13:10,452 INFO L168 Benchmark]: Boogie Preprocessor took 139.74 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 180.4 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 22:13:10,453 INFO L168 Benchmark]: RCFGBuilder took 399.36 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 163.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:13:10,454 INFO L168 Benchmark]: TraceAbstraction took 4038.07 ms. Allocated memory was 202.9 MB in the beginning and 236.5 MB in the end (delta: 33.6 MB). Free memory was 163.1 MB in the beginning and 94.6 MB in the end (delta: 68.5 MB). Peak memory consumption was 102.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:13:10,459 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.52 ms. Allocated memory is still 138.9 MB. Free memory was 102.9 MB in the beginning and 92.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.74 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 180.4 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 399.36 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 163.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4038.07 ms. Allocated memory was 202.9 MB in the beginning and 236.5 MB in the end (delta: 33.6 MB). Free memory was 163.1 MB in the beginning and 94.6 MB in the end (delta: 68.5 MB). Peak memory consumption was 102.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=6, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 VAL [\old(N)=0, a={1:0}, b={-1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={1:0}, N=2] [L29] COND TRUE i