/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=DEEPEST --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/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:09:31,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:09:31,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:09:31,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:09:31,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:09:31,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:09:31,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:09:31,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:09:31,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:09:31,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:09:31,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:09:31,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:09:31,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:09:31,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:09:31,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:09:31,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:09:31,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:09:31,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:09:31,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:09:31,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:09:31,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:09:31,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:09:31,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:09:31,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:09:31,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:09:31,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:09:31,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:09:31,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:09:31,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:09:31,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:09:31,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:09:31,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:09:31,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:09:31,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:09:31,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:09:31,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:09:31,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:09:31,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:09:31,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:09:31,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:09:31,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:09:31,675 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 01:09:31,729 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:09:31,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:09:31,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:09:31,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:09:31,732 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:09:31,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:09:31,732 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:09:31,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:09:31,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:09:31,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:09:31,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:09:31,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:09:31,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:09:31,734 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:09:31,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:09:31,734 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:09:31,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:09:31,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:09:31,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:09:31,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:09:31,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:09:31,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:09:31,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:09:31,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:09:31,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:09:31,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:09:31,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:09:31,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:09:31,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:09:31,739 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 01:09:32,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:09:32,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:09:32,256 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:09:32,258 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:09:32,258 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:09:32,259 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-09-25 01:09:32,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88afe6ced/252ddb0240304fd3b68a3a98b77dbc7d/FLAGed4ce7988 [2020-09-25 01:09:32,947 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:09:32,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/heavy-2.c [2020-09-25 01:09:32,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88afe6ced/252ddb0240304fd3b68a3a98b77dbc7d/FLAGed4ce7988 [2020-09-25 01:09:33,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88afe6ced/252ddb0240304fd3b68a3a98b77dbc7d [2020-09-25 01:09:33,283 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:09:33,290 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:09:33,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:33,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:09:33,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:09:33,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:33" (1/1) ... [2020-09-25 01:09:33,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc80312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:33, skipping insertion in model container [2020-09-25 01:09:33,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:33" (1/1) ... [2020-09-25 01:09:33,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:09:33,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:09:33,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:33,616 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:09:33,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:33,712 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:09:33,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:33 WrapperNode [2020-09-25 01:09:33,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:33,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:09:33,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:09:33,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:09:33,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:33" (1/1) ... [2020-09-25 01:09:33,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:33" (1/1) ... [2020-09-25 01:09:33,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:33" (1/1) ... [2020-09-25 01:09:33,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:33" (1/1) ... [2020-09-25 01:09:33,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:33" (1/1) ... [2020-09-25 01:09:33,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:33" (1/1) ... [2020-09-25 01:09:33,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:33" (1/1) ... [2020-09-25 01:09:33,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:09:33,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:09:33,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:09:33,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:09:33,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:33" (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 01:09:33,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:09:33,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:09:33,996 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:09:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:09:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:09:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 01:09:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 01:09:33,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:09:33,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 01:09:33,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-09-25 01:09:33,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:09:33,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 01:09:34,293 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:09:34,293 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 01:09:34,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:34 BoogieIcfgContainer [2020-09-25 01:09:34,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:09:34,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:09:34,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:09:34,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:09:34,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:09:33" (1/3) ... [2020-09-25 01:09:34,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59710e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:34, skipping insertion in model container [2020-09-25 01:09:34,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:33" (2/3) ... [2020-09-25 01:09:34,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59710e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:34, skipping insertion in model container [2020-09-25 01:09:34,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:34" (3/3) ... [2020-09-25 01:09:34,314 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-09-25 01:09:34,332 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:09:34,345 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:09:34,373 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:09:34,429 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:09:34,430 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:09:34,430 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:09:34,430 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:09:34,430 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:09:34,430 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:09:34,431 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:09:34,431 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:09:34,459 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-09-25 01:09:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 01:09:34,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:34,467 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] [2020-09-25 01:09:34,468 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash 245897808, now seen corresponding path program 1 times [2020-09-25 01:09:34,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:34,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804677954] [2020-09-25 01:09:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:34,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:34,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:34,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:34,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 01:09:34,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:34,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-09-25 01:09:34,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:34,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:34,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 01:09:34,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:34,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 01:09:34,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:34,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:34,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:34,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 01:09:34,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:34,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 01:09:34,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:34,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:34,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:34,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:34,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:34,992 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 01:09:34,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804677954] [2020-09-25 01:09:34,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:34,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 01:09:34,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997741510] [2020-09-25 01:09:35,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 01:09:35,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:35,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 01:09:35,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 01:09:35,029 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-09-25 01:09:35,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:35,207 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2020-09-25 01:09:35,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 01:09:35,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-25 01:09:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:35,223 INFO L225 Difference]: With dead ends: 98 [2020-09-25 01:09:35,223 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 01:09:35,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 01:09:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 01:09:35,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2020-09-25 01:09:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-25 01:09:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-25 01:09:35,278 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 20 [2020-09-25 01:09:35,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:35,279 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-25 01:09:35,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 01:09:35,279 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-25 01:09:35,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 01:09:35,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:35,281 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] [2020-09-25 01:09:35,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:09:35,281 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:35,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:35,282 INFO L82 PathProgramCache]: Analyzing trace with hash 245856485, now seen corresponding path program 1 times [2020-09-25 01:09:35,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:35,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352268016] [2020-09-25 01:09:35,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:35,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:35,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:35,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:35,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 01:09:35,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:35,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-09-25 01:09:35,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:09:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 01:09:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 01:09:35,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:35,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:35,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:35,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:35,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 01:09:35,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:35,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 01:09:35,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:35,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:35,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:35,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:35,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:35,626 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 01:09:35,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352268016] [2020-09-25 01:09:35,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:35,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:09:35,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140023477] [2020-09-25 01:09:35,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:09:35,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:35,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:09:35,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:09:35,632 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2020-09-25 01:09:35,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:35,843 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-09-25 01:09:35,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 01:09:35,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-25 01:09:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:35,847 INFO L225 Difference]: With dead ends: 88 [2020-09-25 01:09:35,847 INFO L226 Difference]: Without dead ends: 85 [2020-09-25 01:09:35,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:09:35,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-25 01:09:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 40. [2020-09-25 01:09:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-25 01:09:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-25 01:09:35,860 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2020-09-25 01:09:35,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:35,861 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-25 01:09:35,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:09:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-25 01:09:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 01:09:35,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:35,862 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] [2020-09-25 01:09:35,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:09:35,863 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:35,864 INFO L82 PathProgramCache]: Analyzing trace with hash 352436069, now seen corresponding path program 1 times [2020-09-25 01:09:35,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:35,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190298164] [2020-09-25 01:09:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:35,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:35,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:35,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:36,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:36,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 01:09:36,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:09:36,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-09-25 01:09:36,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:36,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:09:36,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 01:09:36,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 01:09:36,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:36,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:36,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:36,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:36,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 01:09:36,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:36,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 01:09:36,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:36,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:36,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:36,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:36,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:36,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190298164] [2020-09-25 01:09:36,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:36,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:09:36,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292942704] [2020-09-25 01:09:36,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:09:36,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:36,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:09:36,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:09:36,355 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 4 states. [2020-09-25 01:09:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:36,525 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-09-25 01:09:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 01:09:36,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-09-25 01:09:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:36,527 INFO L225 Difference]: With dead ends: 100 [2020-09-25 01:09:36,528 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 01:09:36,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:09:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 01:09:36,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 41. [2020-09-25 01:09:36,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-25 01:09:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-25 01:09:36,537 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 26 [2020-09-25 01:09:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:36,537 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-25 01:09:36,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:09:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-25 01:09:36,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 01:09:36,538 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:36,539 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] [2020-09-25 01:09:36,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:09:36,539 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:36,540 INFO L82 PathProgramCache]: Analyzing trace with hash -80258988, now seen corresponding path program 1 times [2020-09-25 01:09:36,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:36,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416070095] [2020-09-25 01:09:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:36,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:36,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:36,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:36,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:37,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:37,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 01:09:37,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 01:09:37,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-09-25 01:09:37,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:37,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:09:37,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 01:09:37,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 01:09:37,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:37,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:37,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:37,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:37,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 01:09:37,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:37,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 01:09:37,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:37,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:37,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:37,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:37,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:37,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416070095] [2020-09-25 01:09:37,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:37,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:09:37,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843541565] [2020-09-25 01:09:37,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:09:37,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:09:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:09:37,687 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-09-25 01:09:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:37,851 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-09-25 01:09:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 01:09:37,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-09-25 01:09:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:37,857 INFO L225 Difference]: With dead ends: 79 [2020-09-25 01:09:37,857 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 01:09:37,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:09:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 01:09:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-09-25 01:09:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 01:09:37,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-25 01:09:37,870 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 32 [2020-09-25 01:09:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:37,870 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-25 01:09:37,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:09:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-25 01:09:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 01:09:37,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:37,876 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] [2020-09-25 01:09:37,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:09:37,877 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:37,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1305862455, now seen corresponding path program 1 times [2020-09-25 01:09:37,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:37,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97272281] [2020-09-25 01:09:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:37,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:37,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:38,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:38,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:41,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:41,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 01:09:41,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 01:09:41,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3877 [2020-09-25 01:09:41,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:09:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 01:09:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 01:09:41,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:41,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:41,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:41,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:41,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 01:09:41,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:41,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 01:09:41,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:41,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:41,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:41,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:41,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:41,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97272281] [2020-09-25 01:09:41,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:41,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 01:09:41,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724196285] [2020-09-25 01:09:41,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 01:09:41,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:41,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 01:09:41,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:09:41,924 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 6 states. [2020-09-25 01:09:42,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:42,140 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-09-25 01:09:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 01:09:42,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-25 01:09:42,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:42,142 INFO L225 Difference]: With dead ends: 89 [2020-09-25 01:09:42,142 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 01:09:42,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-25 01:09:42,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 01:09:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-09-25 01:09:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 01:09:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-09-25 01:09:42,158 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 41 [2020-09-25 01:09:42,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:42,159 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-09-25 01:09:42,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 01:09:42,159 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-09-25 01:09:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 01:09:42,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:42,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:42,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 01:09:42,164 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:42,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:42,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1372608588, now seen corresponding path program 2 times [2020-09-25 01:09:42,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:42,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768937902] [2020-09-25 01:09:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:42,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:42,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:43,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:43,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:47,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 01:09:47,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 01:09:47,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-09-25 01:09:47,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:47,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:09:47,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 01:09:47,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 01:09:47,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:47,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:47,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:47,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 01:09:47,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:47,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 01:09:47,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:47,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:47,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:47,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:47,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:47,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768937902] [2020-09-25 01:09:47,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:47,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 01:09:47,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655615030] [2020-09-25 01:09:47,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 01:09:47,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:47,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 01:09:47,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:09:47,401 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 8 states. [2020-09-25 01:09:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:47,666 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-09-25 01:09:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 01:09:47,667 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-09-25 01:09:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:47,668 INFO L225 Difference]: With dead ends: 107 [2020-09-25 01:09:47,668 INFO L226 Difference]: Without dead ends: 74 [2020-09-25 01:09:47,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-25 01:09:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-25 01:09:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-09-25 01:09:47,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 01:09:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-09-25 01:09:47,677 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 50 [2020-09-25 01:09:47,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:47,678 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-09-25 01:09:47,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 01:09:47,678 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-09-25 01:09:47,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 01:09:47,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:47,679 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-09-25 01:09:47,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 01:09:47,680 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:47,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1219437097, now seen corresponding path program 3 times [2020-09-25 01:09:47,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:47,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216025466] [2020-09-25 01:09:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:47,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:50,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:50,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:52,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:52,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 01:09:52,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 01:09:52,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-09-25 01:09:52,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:52,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:09:52,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 01:09:52,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 01:09:52,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:52,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:52,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:53,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:53,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 01:09:53,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:53,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 01:09:53,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:53,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:53,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:53,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:53,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:53,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216025466] [2020-09-25 01:09:53,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:53,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 01:09:53,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102400685] [2020-09-25 01:09:53,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 01:09:53,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:53,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 01:09:53,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-25 01:09:53,035 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 10 states. [2020-09-25 01:09:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:53,584 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-09-25 01:09:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 01:09:53,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 01:09:53,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:53,588 INFO L225 Difference]: With dead ends: 125 [2020-09-25 01:09:53,588 INFO L226 Difference]: Without dead ends: 83 [2020-09-25 01:09:53,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-25 01:09:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-25 01:09:53,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2020-09-25 01:09:53,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-25 01:09:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-09-25 01:09:53,612 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 59 [2020-09-25 01:09:53,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:53,615 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-09-25 01:09:53,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 01:09:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-09-25 01:09:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 01:09:53,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:53,618 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-09-25 01:09:53,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 01:09:53,619 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:53,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:53,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1194778388, now seen corresponding path program 4 times [2020-09-25 01:09:53,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:53,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924319098] [2020-09-25 01:09:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:53,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:54,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:54,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:55,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:58,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:58,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 01:09:58,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 01:09:58,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-09-25 01:09:58,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:58,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:09:58,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 01:09:58,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 01:09:58,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:58,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:58,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:58,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:58,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 01:09:58,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:58,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 01:09:58,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:58,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:58,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:58,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:58,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:58,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924319098] [2020-09-25 01:09:58,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:58,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 01:09:58,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484983268] [2020-09-25 01:09:58,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 01:09:58,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:58,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 01:09:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-25 01:09:58,981 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 12 states. [2020-09-25 01:09:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:59,461 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2020-09-25 01:09:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 01:09:59,461 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-09-25 01:09:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:59,464 INFO L225 Difference]: With dead ends: 143 [2020-09-25 01:09:59,465 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 01:09:59,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-25 01:09:59,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 01:09:59,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2020-09-25 01:09:59,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 01:09:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-25 01:09:59,481 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-09-25 01:09:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:59,484 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-25 01:09:59,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 01:09:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-25 01:09:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-25 01:09:59,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:59,485 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-09-25 01:09:59,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 01:09:59,486 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:59,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:59,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1191054729, now seen corresponding path program 5 times [2020-09-25 01:09:59,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:59,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984517440] [2020-09-25 01:09:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:59,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:01,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:01,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:01,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:04,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:10:04,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 01:10:04,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 01:10:04,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5299 [2020-09-25 01:10:04,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:10:04,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 01:10:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 01:10:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 01:10:04,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:10:05,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:10:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:10:05,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:05,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:10:05,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 01:10:05,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:10:05,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 01:10:05,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:10:05,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:10:05,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:10:05,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:10:05,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:10:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:10:05,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984517440] [2020-09-25 01:10:05,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:10:05,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 01:10:05,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762749428] [2020-09-25 01:10:05,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 01:10:05,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:10:05,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 01:10:05,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-25 01:10:05,120 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 14 states. [2020-09-25 01:10:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:10:05,699 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-09-25 01:10:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 01:10:05,701 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-09-25 01:10:05,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:10:05,704 INFO L225 Difference]: With dead ends: 161 [2020-09-25 01:10:05,705 INFO L226 Difference]: Without dead ends: 101 [2020-09-25 01:10:05,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-09-25 01:10:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-25 01:10:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-09-25 01:10:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-25 01:10:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-09-25 01:10:05,723 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 77 [2020-09-25 01:10:05,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:10:05,726 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-09-25 01:10:05,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 01:10:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-09-25 01:10:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-25 01:10:05,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:10:05,728 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-09-25 01:10:05,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 01:10:05,728 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:10:05,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:10:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash 123928180, now seen corresponding path program 6 times [2020-09-25 01:10:05,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:10:05,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300808864] [2020-09-25 01:10:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:10:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:10:05,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:08,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:08,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:10,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:10,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:10:10,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-25 01:10:10,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 01:10:10,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-09-25 01:10:10,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:10:10,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 01:10:10,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 01:10:10,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 01:10:10,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:10:11,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:10:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:10:11,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:11,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:10:11,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 01:10:11,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:10:11,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 01:10:11,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:10:11,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:10:11,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:10:11,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:10:11,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:10:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:10:11,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300808864] [2020-09-25 01:10:11,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:10:11,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 01:10:11,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498573473] [2020-09-25 01:10:11,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 01:10:11,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:10:11,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 01:10:11,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-09-25 01:10:11,221 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 16 states. [2020-09-25 01:10:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:10:12,069 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2020-09-25 01:10:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 01:10:12,070 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-09-25 01:10:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:10:12,071 INFO L225 Difference]: With dead ends: 179 [2020-09-25 01:10:12,071 INFO L226 Difference]: Without dead ends: 110 [2020-09-25 01:10:12,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2020-09-25 01:10:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-25 01:10:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-09-25 01:10:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 01:10:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-09-25 01:10:12,080 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 86 [2020-09-25 01:10:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:10:12,081 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-09-25 01:10:12,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 01:10:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-09-25 01:10:12,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-25 01:10:12,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:10:12,082 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2020-09-25 01:10:12,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 01:10:12,083 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:10:12,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:10:12,083 INFO L82 PathProgramCache]: Analyzing trace with hash -359457001, now seen corresponding path program 7 times [2020-09-25 01:10:12,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:10:12,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293163635] [2020-09-25 01:10:12,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:10:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:10:12,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:15,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:15,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:16,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking...