/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:35:29,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:35:29,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:35:29,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:35:29,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:35:29,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:35:29,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:35:29,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:35:29,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:35:29,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:35:29,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:35:29,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:35:29,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:35:29,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:35:29,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:35:29,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:35:29,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:35:29,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:35:29,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:35:29,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:35:29,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:35:29,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:35:29,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:35:29,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:35:29,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:35:29,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:35:29,703 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:35:29,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:35:29,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:35:29,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:35:29,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:35:29,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:35:29,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:35:29,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:35:29,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:35:29,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:35:29,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:35:29,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:35:29,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:35:29,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:35:29,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:35:29,719 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 [2020-09-21 12:35:29,767 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:35:29,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:35:29,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:35:29,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:35:29,770 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:35:29,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:35:29,770 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:35:29,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:35:29,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:35:29,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:35:29,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:35:29,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:35:29,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:35:29,773 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:35:29,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:35:29,773 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:35:29,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:35:29,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:35:29,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:35:29,774 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:35:29,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:35:29,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:35:29,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:35:29,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:35:29,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:35:29,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:35:29,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:35:29,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:35:29,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:35:29,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:35:30,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:35:30,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:35:30,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:35:30,258 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:35:30,259 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:35:30,261 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-21 12:35:30,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/61234459a/0211fd1867a249079f2b5cc6841de9c0/FLAG90e8ea2d8 [2020-09-21 12:35:30,903 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:35:30,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-21 12:35:30,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/61234459a/0211fd1867a249079f2b5cc6841de9c0/FLAG90e8ea2d8 [2020-09-21 12:35:31,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/61234459a/0211fd1867a249079f2b5cc6841de9c0 [2020-09-21 12:35:31,266 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:35:31,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:35:31,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:35:31,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:35:31,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:35:31,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:31" (1/1) ... [2020-09-21 12:35:31,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49b8db4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:31, skipping insertion in model container [2020-09-21 12:35:31,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:31" (1/1) ... [2020-09-21 12:35:31,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:35:31,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:35:31,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:35:31,617 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:35:31,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:35:31,656 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:35:31,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:31 WrapperNode [2020-09-21 12:35:31,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:35:31,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:35:31,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:35:31,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:35:31,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:31" (1/1) ... [2020-09-21 12:35:31,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:31" (1/1) ... [2020-09-21 12:35:31,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:31" (1/1) ... [2020-09-21 12:35:31,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:31" (1/1) ... [2020-09-21 12:35:31,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:31" (1/1) ... [2020-09-21 12:35:31,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:31" (1/1) ... [2020-09-21 12:35:31,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:31" (1/1) ... [2020-09-21 12:35:31,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:35:31,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:35:31,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:35:31,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:35:31,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:31" (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 [2020-09-21 12:35:31,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:35:31,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:35:31,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:35:31,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:35:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:35:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:35:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 12:35:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:35:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:35:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:35:32,086 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:35:32,087 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:35:32,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:32 BoogieIcfgContainer [2020-09-21 12:35:32,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:35:32,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:35:32,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:35:32,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:35:32,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:35:31" (1/3) ... [2020-09-21 12:35:32,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d241ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:32, skipping insertion in model container [2020-09-21 12:35:32,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:31" (2/3) ... [2020-09-21 12:35:32,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d241ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:32, skipping insertion in model container [2020-09-21 12:35:32,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:32" (3/3) ... [2020-09-21 12:35:32,102 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-21 12:35:32,115 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:35:32,125 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:35:32,150 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:35:32,189 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:35:32,189 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:35:32,190 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:35:32,190 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:35:32,190 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:35:32,190 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:35:32,190 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:35:32,191 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:35:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-21 12:35:32,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 12:35:32,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:32,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:32,244 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:32,272 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-09-21 12:35:32,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:32,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152600978] [2020-09-21 12:35:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:32,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:32,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:32,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:32,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 12:35:32,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:32,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-09-21 12:35:32,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:32,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:35:32,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:32,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-21 12:35:32,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:32,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:32,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:32,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:32,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:32,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:32,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:32,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:32,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:32,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:32,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:32,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152600978] [2020-09-21 12:35:32,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:32,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 12:35:32,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703216499] [2020-09-21 12:35:32,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 12:35:32,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 12:35:32,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 12:35:32,692 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-09-21 12:35:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:32,721 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-09-21 12:35:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 12:35:32,723 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-21 12:35:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:32,732 INFO L225 Difference]: With dead ends: 30 [2020-09-21 12:35:32,732 INFO L226 Difference]: Without dead ends: 13 [2020-09-21 12:35:32,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 12:35:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-21 12:35:32,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-21 12:35:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-21 12:35:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-09-21 12:35:32,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-09-21 12:35:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:32,782 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-09-21 12:35:32,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 12:35:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-09-21 12:35:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 12:35:32,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:32,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:32,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:35:32,784 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:32,786 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-09-21 12:35:32,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:32,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759436948] [2020-09-21 12:35:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:32,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:32,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:32,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 12:35:32,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:32,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-09-21 12:35:32,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:32,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:35:32,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:32,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:35:32,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:32,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:32,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:32,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:32,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:32,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:32,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:32,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:32,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:32,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:32,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:32,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:32,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759436948] [2020-09-21 12:35:32,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:32,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:35:32,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710961384] [2020-09-21 12:35:32,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:35:32,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:32,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:35:32,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:35:32,973 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-09-21 12:35:33,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:33,016 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-09-21 12:35:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:35:33,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-09-21 12:35:33,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:33,018 INFO L225 Difference]: With dead ends: 21 [2020-09-21 12:35:33,018 INFO L226 Difference]: Without dead ends: 16 [2020-09-21 12:35:33,020 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 [2020-09-21 12:35:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-21 12:35:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-21 12:35:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 12:35:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-09-21 12:35:33,026 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-09-21 12:35:33,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:33,026 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-09-21 12:35:33,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:35:33,027 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-09-21 12:35:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 12:35:33,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:33,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:33,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:35:33,028 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-09-21 12:35:33,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:33,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220856290] [2020-09-21 12:35:33,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:33,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:33,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:33,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:35:33,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:33,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-09-21 12:35:33,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:35:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:35:33,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:33,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:33,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:33,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:33,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:33,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:33,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:33,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:33,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:33,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:33,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:33,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220856290] [2020-09-21 12:35:33,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:33,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:35:33,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500974640] [2020-09-21 12:35:33,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:35:33,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:33,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:35:33,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:35:33,418 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2020-09-21 12:35:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:33,542 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-09-21 12:35:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:35:33,543 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-21 12:35:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:33,546 INFO L225 Difference]: With dead ends: 28 [2020-09-21 12:35:33,547 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 12:35:33,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:35:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 12:35:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-09-21 12:35:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 12:35:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-09-21 12:35:33,556 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-09-21 12:35:33,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:33,556 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-09-21 12:35:33,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:35:33,557 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-09-21 12:35:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 12:35:33,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:33,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:33,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:35:33,558 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:33,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-09-21 12:35:33,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:33,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217428131] [2020-09-21 12:35:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:33,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:33,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:33,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:33,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:33,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 12:35:33,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:35:33,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-09-21 12:35:33,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:33,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:35:33,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:33,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:35:33,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:33,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:33,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:33,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:33,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:33,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:33,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:33,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:33,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:33,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:33,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 12:35:33,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217428131] [2020-09-21 12:35:33,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:33,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:35:33,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489278655] [2020-09-21 12:35:33,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:35:33,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:33,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:35:33,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:35:33,746 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-09-21 12:35:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:33,763 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-09-21 12:35:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:35:33,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-21 12:35:33,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:33,765 INFO L225 Difference]: With dead ends: 28 [2020-09-21 12:35:33,765 INFO L226 Difference]: Without dead ends: 17 [2020-09-21 12:35:33,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:35:33,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-21 12:35:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-09-21 12:35:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-21 12:35:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-09-21 12:35:33,771 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2020-09-21 12:35:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:33,772 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-09-21 12:35:33,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:35:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-09-21 12:35:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 12:35:33,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:33,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:33,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:35:33,773 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:33,774 INFO L82 PathProgramCache]: Analyzing trace with hash 57842105, now seen corresponding path program 2 times [2020-09-21 12:35:33,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:33,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991959633] [2020-09-21 12:35:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:33,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:33,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:33,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 12:35:33,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:33,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-21 12:35:33,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:33,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:35:33,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:33,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:35:33,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:33,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:33,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:33,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:33,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:33,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:33,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:33,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:33,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:33,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:33,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991959633] [2020-09-21 12:35:33,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:33,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 12:35:33,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646781352] [2020-09-21 12:35:33,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:35:33,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:33,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:35:33,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:35:33,854 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-09-21 12:35:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:33,881 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-09-21 12:35:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:35:33,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-21 12:35:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:33,883 INFO L225 Difference]: With dead ends: 27 [2020-09-21 12:35:33,883 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 12:35:33,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:35:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 12:35:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-09-21 12:35:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 12:35:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-21 12:35:33,889 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-09-21 12:35:33,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:33,890 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-21 12:35:33,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:35:33,890 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-21 12:35:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 12:35:33,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:33,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:33,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:35:33,891 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:33,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:33,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-09-21 12:35:33,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:33,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519266518] [2020-09-21 12:35:33,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:33,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:33,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 12:35:33,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:33,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-21 12:35:33,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:35:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:35:33,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:34,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:34,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:34,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:34,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:34,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:34,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:34,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:34,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:35:34,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519266518] [2020-09-21 12:35:34,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:34,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:35:34,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944706120] [2020-09-21 12:35:34,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:35:34,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:34,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:35:34,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:35:34,206 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-09-21 12:35:34,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:34,442 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-09-21 12:35:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:35:34,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-09-21 12:35:34,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:34,444 INFO L225 Difference]: With dead ends: 27 [2020-09-21 12:35:34,444 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 12:35:34,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-21 12:35:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 12:35:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-09-21 12:35:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 12:35:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-09-21 12:35:34,451 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-09-21 12:35:34,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:34,451 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-09-21 12:35:34,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:35:34,452 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-09-21 12:35:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 12:35:34,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:34,453 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:34,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:35:34,453 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:34,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 3 times [2020-09-21 12:35:34,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:34,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933611921] [2020-09-21 12:35:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:34,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:34,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:34,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:35:34,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:34,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-21 12:35:34,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:34,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:35:34,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:34,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:35:34,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:34,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:34,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:34,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:34,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:34,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:34,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:34,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:34,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:34,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933611921] [2020-09-21 12:35:34,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:34,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:35:34,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337983687] [2020-09-21 12:35:34,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:35:34,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:34,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:35:34,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:35:34,574 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-09-21 12:35:34,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:34,609 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-09-21 12:35:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:35:34,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-21 12:35:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:34,610 INFO L225 Difference]: With dead ends: 33 [2020-09-21 12:35:34,611 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 12:35:34,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:35:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 12:35:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-09-21 12:35:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 12:35:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-21 12:35:34,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-09-21 12:35:34,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:34,618 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-21 12:35:34,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:35:34,618 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-21 12:35:34,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:35:34,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:34,619 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:34,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:35:34,620 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:34,620 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 4 times [2020-09-21 12:35:34,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:34,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868510838] [2020-09-21 12:35:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:34,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:34,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:34,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:35:34,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:34,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-21 12:35:34,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:34,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:35:34,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:34,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:35:34,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:34,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:34,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:34,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:34,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:34,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:34,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:34,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:34,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:34,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:34,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:34,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:34,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868510838] [2020-09-21 12:35:34,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:34,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:35:34,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981055885] [2020-09-21 12:35:34,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:35:34,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:34,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:35:34,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:35:34,781 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-09-21 12:35:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:34,818 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-09-21 12:35:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:35:34,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-09-21 12:35:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:34,820 INFO L225 Difference]: With dead ends: 36 [2020-09-21 12:35:34,820 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 12:35:34,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:35:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 12:35:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-09-21 12:35:34,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 12:35:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-21 12:35:34,827 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-09-21 12:35:34,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:34,827 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-21 12:35:34,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:35:34,827 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-21 12:35:34,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:35:34,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:34,828 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:34,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:35:34,829 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:34,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:34,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 5 times [2020-09-21 12:35:34,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:34,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150090469] [2020-09-21 12:35:34,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:34,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:34,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:34,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:35:34,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:34,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-09-21 12:35:34,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:34,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:35:34,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:34,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:35:34,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:35,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:35,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:35,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:35,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:35,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:35,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:35,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:35,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150090469] [2020-09-21 12:35:35,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:35,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:35:35,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019808741] [2020-09-21 12:35:35,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:35:35,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:35,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:35:35,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:35:35,018 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-09-21 12:35:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:35,061 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-09-21 12:35:35,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:35:35,062 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-09-21 12:35:35,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:35,063 INFO L225 Difference]: With dead ends: 39 [2020-09-21 12:35:35,063 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 12:35:35,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:35:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 12:35:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-21 12:35:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 12:35:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-09-21 12:35:35,069 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-09-21 12:35:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:35,070 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-09-21 12:35:35,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:35:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-09-21 12:35:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:35:35,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:35,071 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:35,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:35:35,071 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:35,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 6 times [2020-09-21 12:35:35,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:35,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527315207] [2020-09-21 12:35:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:35:35,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:35,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-09-21 12:35:35,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:35:35,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:35,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:35:35,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:35,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:35,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:35,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:35:35,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:35,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:35,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:35,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527315207] [2020-09-21 12:35:35,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:35,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:35:35,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736569221] [2020-09-21 12:35:35,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:35:35,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:35,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:35:35,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:35:35,263 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-09-21 12:35:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:35,328 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-09-21 12:35:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:35:35,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-21 12:35:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:35,332 INFO L225 Difference]: With dead ends: 42 [2020-09-21 12:35:35,332 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 12:35:35,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:35:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 12:35:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-21 12:35:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 12:35:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-09-21 12:35:35,344 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-09-21 12:35:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:35,344 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-09-21 12:35:35,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:35:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-09-21 12:35:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 12:35:35,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:35,349 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:35,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:35:35,350 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:35,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:35,350 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 7 times [2020-09-21 12:35:35,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:35,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835400812] [2020-09-21 12:35:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 12:35:35,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:35,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-09-21 12:35:35,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:35:35,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:35,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 12:35:35,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:35,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:35,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:35,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:35:35,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:35,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:35,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:35,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835400812] [2020-09-21 12:35:35,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:35,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:35:35,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514187488] [2020-09-21 12:35:35,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:35:35,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:35,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:35:35,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:35:35,607 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-09-21 12:35:35,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:35,658 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-21 12:35:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:35:35,658 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-21 12:35:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:35,659 INFO L225 Difference]: With dead ends: 45 [2020-09-21 12:35:35,659 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 12:35:35,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:35:35,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 12:35:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-09-21 12:35:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 12:35:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-21 12:35:35,666 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-09-21 12:35:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:35,666 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-21 12:35:35,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:35:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-21 12:35:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 12:35:35,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:35,668 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:35,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:35:35,668 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:35,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:35,669 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 8 times [2020-09-21 12:35:35,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:35,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112094705] [2020-09-21 12:35:35,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 12:35:35,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:35,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-09-21 12:35:35,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:35:35,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:35,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 12:35:35,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:36,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:36,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:36,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:36,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:36,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:35:36,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:36,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:35:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:36,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112094705] [2020-09-21 12:35:36,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:36,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:35:36,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78538166] [2020-09-21 12:35:36,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:35:36,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:36,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:35:36,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:35:36,042 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-09-21 12:35:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:36,107 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-09-21 12:35:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:35:36,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-09-21 12:35:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:36,108 INFO L225 Difference]: With dead ends: 48 [2020-09-21 12:35:36,108 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 12:35:36,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:35:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 12:35:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-09-21 12:35:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 12:35:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-21 12:35:36,119 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-09-21 12:35:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:36,120 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-21 12:35:36,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:35:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-21 12:35:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 12:35:36,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:36,121 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:36,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:35:36,121 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:36,122 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 9 times [2020-09-21 12:35:36,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:36,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388488539] [2020-09-21 12:35:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:36,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:36,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:35:36,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:36,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-09-21 12:35:36,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:36,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:35:36,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:36,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-21 12:35:36,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:36,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:36,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:36,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:36,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:36,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:35:36,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:36,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:36,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:36,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:36,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:36,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388488539] [2020-09-21 12:35:36,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:36,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:35:36,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725074232] [2020-09-21 12:35:36,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:35:36,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:36,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:35:36,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:35:36,494 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-09-21 12:35:36,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:36,553 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-09-21 12:35:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:35:36,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-09-21 12:35:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:36,555 INFO L225 Difference]: With dead ends: 51 [2020-09-21 12:35:36,555 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 12:35:36,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:35:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 12:35:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-09-21 12:35:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 12:35:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-21 12:35:36,561 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-09-21 12:35:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:36,561 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-21 12:35:36,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:35:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-21 12:35:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 12:35:36,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:36,563 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:36,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 12:35:36,563 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:36,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:36,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 10 times [2020-09-21 12:35:36,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:36,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309782548] [2020-09-21 12:35:36,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:35:36,580 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:35:36,580 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:35:36,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 12:35:36,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:35:36 BoogieIcfgContainer [2020-09-21 12:35:36,608 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:35:36,611 INFO L168 Benchmark]: Toolchain (without parser) took 5342.71 ms. Allocated memory was 140.5 MB in the beginning and 246.4 MB in the end (delta: 105.9 MB). Free memory was 104.3 MB in the beginning and 112.6 MB in the end (delta: -8.2 MB). Peak memory consumption was 97.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:36,612 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:35:36,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.48 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 94.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:36,614 INFO L168 Benchmark]: Boogie Preprocessor took 116.71 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.4 MB in the beginning and 183.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:36,615 INFO L168 Benchmark]: RCFGBuilder took 318.04 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 171.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:36,615 INFO L168 Benchmark]: TraceAbstraction took 4514.14 ms. Allocated memory was 203.9 MB in the beginning and 246.4 MB in the end (delta: 42.5 MB). Free memory was 170.7 MB in the beginning and 112.6 MB in the end (delta: 58.1 MB). Peak memory consumption was 100.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:36,619 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 385.48 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 94.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.71 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.4 MB in the beginning and 183.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.04 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 171.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4514.14 ms. Allocated memory was 203.9 MB in the beginning and 246.4 MB in the end (delta: 42.5 MB). Free memory was 170.7 MB in the beginning and 112.6 MB in the end (delta: 58.1 MB). Peak memory consumption was 100.6 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, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.4s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 62 SDslu, 428 SDs, 0 SdLazy, 370 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 12 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 16530 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 86/415 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...