/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:26:44,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:26:44,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:26:44,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:26:44,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:26:44,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:26:44,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:26:44,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:26:44,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:26:44,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:26:44,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:26:44,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:26:44,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:26:44,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:26:44,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:26:44,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:26:44,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:26:44,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:26:44,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:26:44,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:26:44,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:26:44,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:26:44,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:26:44,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:26:44,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:26:44,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:26:44,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:26:44,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:26:44,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:26:44,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:26:44,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:26:44,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:26:44,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:26:44,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:26:44,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:26:44,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:26:44,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:26:44,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:26:44,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:26:44,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:26:44,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:26:44,136 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 [2020-09-25 03:26:44,162 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:26:44,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:26:44,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:26:44,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:26:44,165 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:26:44,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:26:44,165 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:26:44,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:26:44,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:26:44,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:26:44,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:26:44,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:26:44,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:26:44,167 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:26:44,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:26:44,167 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:26:44,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:26:44,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:26:44,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:26:44,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:26:44,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:26:44,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:26:44,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:26:44,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:26:44,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:26:44,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:26:44,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:26:44,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:26:44,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:26:44,170 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-09-25 03:26:44,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:26:44,713 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:26:44,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:26:44,720 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:26:44,721 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:26:44,722 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-25 03:26:44,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb30dfd5d/8101c9552c1d46e8a8d38e21aabf4475/FLAG2b40f8454 [2020-09-25 03:26:45,325 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:26:45,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-25 03:26:45,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb30dfd5d/8101c9552c1d46e8a8d38e21aabf4475/FLAG2b40f8454 [2020-09-25 03:26:45,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb30dfd5d/8101c9552c1d46e8a8d38e21aabf4475 [2020-09-25 03:26:45,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:26:45,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:26:45,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:26:45,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:26:45,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:26:45,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:26:45" (1/1) ... [2020-09-25 03:26:45,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7decd891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:45, skipping insertion in model container [2020-09-25 03:26:45,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:26:45" (1/1) ... [2020-09-25 03:26:45,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:26:45,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:26:46,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:26:46,060 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:26:46,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:26:46,091 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:26:46,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:46 WrapperNode [2020-09-25 03:26:46,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:26:46,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:26:46,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:26:46,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:26:46,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:46" (1/1) ... [2020-09-25 03:26:46,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:46" (1/1) ... [2020-09-25 03:26:46,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:46" (1/1) ... [2020-09-25 03:26:46,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:46" (1/1) ... [2020-09-25 03:26:46,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:46" (1/1) ... [2020-09-25 03:26:46,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:46" (1/1) ... [2020-09-25 03:26:46,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:46" (1/1) ... [2020-09-25 03:26:46,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:26:46,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:26:46,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:26:46,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:26:46,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:46" (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 [2020-09-25 03:26:46,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:26:46,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:26:46,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:26:46,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:26:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:26:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:26:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:26:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:26:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:26:46,503 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:26:46,504 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 03:26:46,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:26:46 BoogieIcfgContainer [2020-09-25 03:26:46,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:26:46,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:26:46,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:26:46,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:26:46,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:26:45" (1/3) ... [2020-09-25 03:26:46,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2747e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:26:46, skipping insertion in model container [2020-09-25 03:26:46,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:46" (2/3) ... [2020-09-25 03:26:46,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2747e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:26:46, skipping insertion in model container [2020-09-25 03:26:46,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:26:46" (3/3) ... [2020-09-25 03:26:46,520 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-25 03:26:46,530 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:26:46,541 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:26:46,565 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:26:46,596 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:26:46,596 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:26:46,596 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:26:46,596 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:26:46,597 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:26:46,597 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:26:46,597 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:26:46,597 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:26:46,617 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-25 03:26:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 03:26:46,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:46,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:46,626 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:46,633 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-09-25 03:26:46,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:46,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947068751] [2020-09-25 03:26:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:46,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:46,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:46,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:46,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 03:26:46,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:26:46,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-25 03:26:46,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:46,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:26:46,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 03:26:46,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 03:26:46,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 03:26:46,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:46,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:46,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:46,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:47,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:47,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:26:47,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:47,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:47,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:47,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:47,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947068751] [2020-09-25 03:26:47,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:26:47,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:26:47,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516828204] [2020-09-25 03:26:47,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:26:47,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:47,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:26:47,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:26:47,043 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-09-25 03:26:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:47,219 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-09-25 03:26:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 03:26:47,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-25 03:26:47,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:47,232 INFO L225 Difference]: With dead ends: 48 [2020-09-25 03:26:47,232 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 03:26:47,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:26:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 03:26:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-25 03:26:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-25 03:26:47,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-09-25 03:26:47,280 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2020-09-25 03:26:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:47,281 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-09-25 03:26:47,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:26:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-09-25 03:26:47,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 03:26:47,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:47,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:47,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:26:47,283 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:47,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-09-25 03:26:47,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:47,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424323037] [2020-09-25 03:26:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:47,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 03:26:47,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:26:47,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-25 03:26:47,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:26:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:26:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 03:26:47,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:47,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:47,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:47,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:47,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:26:47,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:47,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:47,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424323037] [2020-09-25 03:26:47,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:47,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 03:26:47,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292911332] [2020-09-25 03:26:47,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:26:47,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:47,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:26:47,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:26:47,484 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-09-25 03:26:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:47,559 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-09-25 03:26:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 03:26:47,560 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-25 03:26:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:47,561 INFO L225 Difference]: With dead ends: 45 [2020-09-25 03:26:47,562 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 03:26:47,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 03:26:47,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 03:26:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-09-25 03:26:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-25 03:26:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-25 03:26:47,570 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2020-09-25 03:26:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:47,571 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-25 03:26:47,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:26:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-25 03:26:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 03:26:47,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:47,572 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:47,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:26:47,573 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash 891941667, now seen corresponding path program 2 times [2020-09-25 03:26:47,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:47,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133659260] [2020-09-25 03:26:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:47,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 03:26:47,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:26:47,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-09-25 03:26:47,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:26:47,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:26:47,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 03:26:47,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:47,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:47,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:47,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:47,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:47,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:47,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:47,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:47,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:47,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133659260] [2020-09-25 03:26:47,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:47,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 03:26:47,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423454122] [2020-09-25 03:26:47,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 03:26:47,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:47,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 03:26:47,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 03:26:47,949 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-09-25 03:26:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:48,076 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-25 03:26:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 03:26:48,077 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-25 03:26:48,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:48,078 INFO L225 Difference]: With dead ends: 45 [2020-09-25 03:26:48,078 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 03:26:48,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:26:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 03:26:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-25 03:26:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 03:26:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-09-25 03:26:48,086 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 24 [2020-09-25 03:26:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:48,086 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-09-25 03:26:48,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 03:26:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-09-25 03:26:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 03:26:48,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:48,088 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:48,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:26:48,088 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:48,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1860713659, now seen corresponding path program 3 times [2020-09-25 03:26:48,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:48,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95144975] [2020-09-25 03:26:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:48,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:48,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 03:26:48,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:26:48,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-09-25 03:26:48,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:26:48,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:26:48,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 03:26:48,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:48,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:48,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:48,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:48,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:48,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:48,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:48,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:48,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:48,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95144975] [2020-09-25 03:26:48,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:48,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 03:26:48,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949972620] [2020-09-25 03:26:48,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 03:26:48,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 03:26:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:26:48,508 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 9 states. [2020-09-25 03:26:48,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:48,679 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-09-25 03:26:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 03:26:48,680 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-09-25 03:26:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:48,681 INFO L225 Difference]: With dead ends: 44 [2020-09-25 03:26:48,681 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 03:26:48,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-25 03:26:48,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 03:26:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-25 03:26:48,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 03:26:48,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 03:26:48,689 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2020-09-25 03:26:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:48,689 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 03:26:48,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 03:26:48,689 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 03:26:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 03:26:48,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:48,691 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:48,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:26:48,692 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:48,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1338804338, now seen corresponding path program 1 times [2020-09-25 03:26:48,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:48,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086865894] [2020-09-25 03:26:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:48,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:49,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:49,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 03:26:49,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:26:49,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-09-25 03:26:49,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:49,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 03:26:49,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:26:49,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 03:26:49,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:49,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:49,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:49,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:49,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:49,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:49,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:49,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:49,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:49,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:49,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:49,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:49,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086865894] [2020-09-25 03:26:49,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:49,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 03:26:49,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596088814] [2020-09-25 03:26:49,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 03:26:49,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:49,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 03:26:49,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:26:49,330 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states. [2020-09-25 03:26:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:49,535 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-09-25 03:26:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 03:26:49,536 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-09-25 03:26:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:49,539 INFO L225 Difference]: With dead ends: 49 [2020-09-25 03:26:49,539 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 03:26:49,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-25 03:26:49,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 03:26:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-25 03:26:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-25 03:26:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-25 03:26:49,548 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-09-25 03:26:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:49,548 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-25 03:26:49,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 03:26:49,549 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-25 03:26:49,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 03:26:49,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:49,550 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:49,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:26:49,551 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:49,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1859782885, now seen corresponding path program 2 times [2020-09-25 03:26:49,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:49,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362711541] [2020-09-25 03:26:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:49,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:49,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:49,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:49,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:50,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:50,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 03:26:50,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:26:50,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-09-25 03:26:50,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:50,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 03:26:50,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:26:50,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 03:26:50,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:50,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:50,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:50,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:50,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:50,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:50,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:50,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:50,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:50,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:50,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:50,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:50,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362711541] [2020-09-25 03:26:50,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:50,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 03:26:50,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432776071] [2020-09-25 03:26:50,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 03:26:50,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:50,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 03:26:50,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:26:50,500 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 13 states. [2020-09-25 03:26:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:50,805 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-25 03:26:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 03:26:50,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-09-25 03:26:50,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:50,807 INFO L225 Difference]: With dead ends: 54 [2020-09-25 03:26:50,808 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 03:26:50,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-25 03:26:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 03:26:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-25 03:26:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 03:26:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-09-25 03:26:50,815 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2020-09-25 03:26:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:50,816 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-09-25 03:26:50,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 03:26:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-09-25 03:26:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-25 03:26:50,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:50,818 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:50,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:26:50,818 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:50,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:50,819 INFO L82 PathProgramCache]: Analyzing trace with hash 350505490, now seen corresponding path program 3 times [2020-09-25 03:26:50,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:50,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800339752] [2020-09-25 03:26:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:50,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:50,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:50,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:51,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:51,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 03:26:51,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:26:51,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-09-25 03:26:51,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:51,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 03:26:51,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:26:51,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 03:26:51,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:51,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:51,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:51,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:51,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:51,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:51,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:26:51,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:51,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:51,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:51,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:51,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:51,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800339752] [2020-09-25 03:26:51,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:51,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 03:26:51,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872387445] [2020-09-25 03:26:51,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 03:26:51,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:51,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 03:26:51,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-25 03:26:51,611 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 15 states. [2020-09-25 03:26:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:51,875 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-09-25 03:26:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 03:26:51,876 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-09-25 03:26:51,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:51,877 INFO L225 Difference]: With dead ends: 59 [2020-09-25 03:26:51,877 INFO L226 Difference]: Without dead ends: 54 [2020-09-25 03:26:51,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-25 03:26:51,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-25 03:26:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-09-25 03:26:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 03:26:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-25 03:26:51,884 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 45 [2020-09-25 03:26:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:51,885 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-25 03:26:51,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 03:26:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-25 03:26:51,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 03:26:51,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:51,887 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:51,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:26:51,887 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash -892978821, now seen corresponding path program 4 times [2020-09-25 03:26:51,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:51,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980234050] [2020-09-25 03:26:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:51,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:51,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:52,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:52,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 03:26:52,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:26:52,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-09-25 03:26:52,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 03:26:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:26:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 03:26:52,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:52,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:52,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:52,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:52,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:52,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:52,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:26:52,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:52,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:52,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:52,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:52,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:52,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980234050] [2020-09-25 03:26:52,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:52,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 03:26:52,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194257057] [2020-09-25 03:26:52,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 03:26:52,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:52,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 03:26:52,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 03:26:52,607 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 17 states. [2020-09-25 03:26:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:53,007 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-09-25 03:26:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 03:26:53,008 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-09-25 03:26:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:53,009 INFO L225 Difference]: With dead ends: 61 [2020-09-25 03:26:53,009 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 03:26:53,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-25 03:26:53,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 03:26:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-25 03:26:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-25 03:26:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-09-25 03:26:53,017 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2020-09-25 03:26:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:53,018 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-09-25 03:26:53,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 03:26:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-09-25 03:26:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 03:26:53,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:53,019 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:53,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 03:26:53,020 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:53,020 INFO L82 PathProgramCache]: Analyzing trace with hash 586056626, now seen corresponding path program 5 times [2020-09-25 03:26:53,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:53,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888217514] [2020-09-25 03:26:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 03:26:53,036 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 03:26:53,036 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 03:26:53,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 03:26:53,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 03:26:53 BoogieIcfgContainer [2020-09-25 03:26:53,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 03:26:53,090 INFO L168 Benchmark]: Toolchain (without parser) took 7384.33 ms. Allocated memory was 139.5 MB in the beginning and 277.3 MB in the end (delta: 137.9 MB). Free memory was 103.0 MB in the beginning and 116.7 MB in the end (delta: -13.7 MB). Peak memory consumption was 124.2 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:53,092 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 03:26:53,094 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.48 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:53,095 INFO L168 Benchmark]: Boogie Preprocessor took 123.02 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 93.0 MB in the beginning and 181.0 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:53,096 INFO L168 Benchmark]: RCFGBuilder took 292.62 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 168.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:53,100 INFO L168 Benchmark]: TraceAbstraction took 6569.39 ms. Allocated memory was 201.9 MB in the beginning and 277.3 MB in the end (delta: 75.5 MB). Free memory was 168.1 MB in the beginning and 116.7 MB in the end (delta: 51.4 MB). Peak memory consumption was 126.9 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:53,113 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 389.48 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.02 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 93.0 MB in the beginning and 181.0 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 292.62 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 168.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6569.39 ms. Allocated memory was 201.9 MB in the beginning and 277.3 MB in the end (delta: 75.5 MB). Free memory was 168.1 MB in the beginning and 116.7 MB in the end (delta: 51.4 MB). Peak memory consumption was 126.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.4s, OverallIterations: 9, TraceHistogramMax: 8, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 139 SDslu, 785 SDs, 0 SdLazy, 432 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 18 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 309 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 246 ConstructedInterpolants, 0 QuantifiedInterpolants, 21550 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 1 PerfectInterpolantSequences, 0/324 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...