/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:30:38,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:30:38,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:30:38,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:30:38,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:30:38,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:30:38,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:30:38,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:30:38,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:30:38,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:30:38,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:30:38,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:30:38,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:30:38,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:30:38,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:30:38,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:30:38,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:30:38,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:30:38,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:30:38,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:30:38,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:30:38,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:30:38,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:30:38,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:30:38,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:30:38,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:30:38,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:30:38,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:30:38,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:30:38,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:30:38,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:30:38,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:30:38,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:30:38,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:30:38,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:30:38,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:30:38,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:30:38,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:30:38,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:30:38,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:30:38,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:30:38,367 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:30:38,414 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:30:38,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:30:38,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:30:38,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:30:38,417 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:30:38,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:30:38,417 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:30:38,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:30:38,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:30:38,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:30:38,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:30:38,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:30:38,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:30:38,420 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:30:38,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:30:38,420 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:30:38,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:30:38,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:30:38,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:30:38,421 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:30:38,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:30:38,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:30:38,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:30:38,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:30:38,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:30:38,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:30:38,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:30:38,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:30:38,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:30:38,423 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:30:38,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:30:38,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:30:38,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:30:38,728 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:30:38,729 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:30:38,730 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-21 21:30:38,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0699d215/c842165b350e46f2b336cd5bb7c400a9/FLAG8a08e017a [2020-08-21 21:30:39,304 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:30:39,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-21 21:30:39,321 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0699d215/c842165b350e46f2b336cd5bb7c400a9/FLAG8a08e017a [2020-08-21 21:30:39,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0699d215/c842165b350e46f2b336cd5bb7c400a9 [2020-08-21 21:30:39,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:30:39,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:30:39,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:30:39,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:30:39,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:30:39,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:30:39" (1/1) ... [2020-08-21 21:30:39,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67be94cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:30:39, skipping insertion in model container [2020-08-21 21:30:39,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:30:39" (1/1) ... [2020-08-21 21:30:39,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:30:39,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:30:40,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:30:40,186 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:30:40,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:30:40,300 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:30:40,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:30:40 WrapperNode [2020-08-21 21:30:40,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:30:40,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:30:40,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:30:40,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:30:40,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:30:40" (1/1) ... [2020-08-21 21:30:40,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:30:40" (1/1) ... [2020-08-21 21:30:40,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:30:40" (1/1) ... [2020-08-21 21:30:40,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:30:40" (1/1) ... [2020-08-21 21:30:40,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:30:40" (1/1) ... [2020-08-21 21:30:40,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:30:40" (1/1) ... [2020-08-21 21:30:40,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:30:40" (1/1) ... [2020-08-21 21:30:40,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:30:40,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:30:40,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:30:40,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:30:40,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:30:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 21:30:40,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:30:40,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:30:40,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:30:40,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:30:40,499 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-21 21:30:40,500 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-21 21:30:40,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:30:40,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 21:30:40,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:30:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:30:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 21:30:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 21:30:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 21:30:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:30:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:30:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 21:30:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 21:30:43,689 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:30:43,689 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 21:30:43,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:30:43 BoogieIcfgContainer [2020-08-21 21:30:43,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:30:43,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:30:43,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:30:43,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:30:43,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:30:39" (1/3) ... [2020-08-21 21:30:43,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9aa776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:30:43, skipping insertion in model container [2020-08-21 21:30:43,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:30:40" (2/3) ... [2020-08-21 21:30:43,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9aa776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:30:43, skipping insertion in model container [2020-08-21 21:30:43,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:30:43" (3/3) ... [2020-08-21 21:30:43,702 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-08-21 21:30:43,713 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:30:43,721 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:30:43,736 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:30:43,762 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:30:43,762 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:30:43,762 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:30:43,762 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:30:43,762 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:30:43,763 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:30:43,763 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:30:43,763 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:30:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-21 21:30:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 21:30:43,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:30:43,792 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:30:43,793 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:30:43,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:30:43,800 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2020-08-21 21:30:43,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:30:43,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44560515] [2020-08-21 21:30:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:30:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:30:44,782 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-21 21:30:44,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:30:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:30:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:30:44,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44560515] [2020-08-21 21:30:44,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:30:44,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 21:30:44,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445995187] [2020-08-21 21:30:44,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 21:30:44,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:30:44,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 21:30:44,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:30:44,883 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 14 states. [2020-08-21 21:31:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:06,148 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2020-08-21 21:31:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 21:31:06,150 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-21 21:31:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:06,162 INFO L225 Difference]: With dead ends: 92 [2020-08-21 21:31:06,162 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 21:31:06,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-08-21 21:31:06,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 21:31:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 21:31:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 21:31:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-08-21 21:31:06,212 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2020-08-21 21:31:06,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:06,213 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-08-21 21:31:06,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 21:31:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-08-21 21:31:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 21:31:06,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:06,215 INFO L422 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, 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] [2020-08-21 21:31:06,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:31:06,216 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:06,216 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2020-08-21 21:31:06,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:06,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150784597] [2020-08-21 21:31:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:06,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:06,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150784597] [2020-08-21 21:31:06,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:31:06,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 21:31:06,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303439103] [2020-08-21 21:31:06,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 21:31:06,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:06,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 21:31:06,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:31:06,736 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 15 states. [2020-08-21 21:31:06,981 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-21 21:31:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:29,802 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-08-21 21:31:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 21:31:29,803 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-21 21:31:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:29,805 INFO L225 Difference]: With dead ends: 65 [2020-08-21 21:31:29,805 INFO L226 Difference]: Without dead ends: 62 [2020-08-21 21:31:29,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-08-21 21:31:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-21 21:31:29,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-08-21 21:31:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 21:31:29,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-08-21 21:31:29,816 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2020-08-21 21:31:29,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:29,816 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-08-21 21:31:29,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 21:31:29,817 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-08-21 21:31:29,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 21:31:29,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:29,819 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:29,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:31:29,819 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:29,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:29,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1610392358, now seen corresponding path program 2 times [2020-08-21 21:31:29,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:29,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856054808] [2020-08-21 21:31:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:30,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:30,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856054808] [2020-08-21 21:31:30,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:31:30,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 21:31:30,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153366977] [2020-08-21 21:31:30,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 21:31:30,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:30,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 21:31:30,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-21 21:31:30,363 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2020-08-21 21:31:30,640 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-21 21:31:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:55,544 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-08-21 21:31:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 21:31:55,548 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-08-21 21:31:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:55,550 INFO L225 Difference]: With dead ends: 70 [2020-08-21 21:31:55,550 INFO L226 Difference]: Without dead ends: 67 [2020-08-21 21:31:55,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-08-21 21:31:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-21 21:31:55,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-08-21 21:31:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 21:31:55,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-08-21 21:31:55,573 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2020-08-21 21:31:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:55,577 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-08-21 21:31:55,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 21:31:55,578 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-08-21 21:31:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 21:31:55,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:55,580 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:55,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:31:55,580 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:55,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1809942103, now seen corresponding path program 3 times [2020-08-21 21:31:55,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:55,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990864505] [2020-08-21 21:31:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:56,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:56,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990864505] [2020-08-21 21:31:56,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:31:56,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 21:31:56,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683974849] [2020-08-21 21:31:56,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 21:31:56,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:56,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 21:31:56,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 21:31:56,170 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states.