/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:26:40,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:26:40,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:26:40,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:26:40,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:26:40,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:26:40,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:26:40,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:26:40,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:26:40,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:26:40,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:26:40,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:26:40,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:26:40,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:26:40,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:26:40,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:26:40,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:26:40,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:26:40,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:26:40,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:26:40,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:26:40,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:26:40,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:26:40,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:26:40,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:26:40,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:26:40,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:26:40,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:26:40,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:26:40,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:26:40,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:26:40,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:26:40,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:26:40,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:26:40,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:26:40,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:26:40,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:26:40,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:26:40,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:26:40,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:26:40,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:26:40,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 03:26:40,628 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:26:40,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:26:40,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:26:40,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:26:40,631 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:26:40,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:26:40,632 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:26:40,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:26:40,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:26:40,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:26:40,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:26:40,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:26:40,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:26:40,635 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:26:40,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:26:40,635 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:26:40,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:26:40,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:26:40,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:26:40,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:26:40,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:26:40,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:26:40,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:26:40,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:26:40,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:26:40,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:26:40,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:26:40,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:26:40,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:26:40,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-09-25 03:26:41,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:26:41,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:26:41,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:26:41,248 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:26:41,249 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:26:41,250 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-25 03:26:41,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6d427d7d/ef8a5334227b468ab8fcfb32749f6bf0/FLAGcea68a929 [2020-09-25 03:26:41,908 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:26:41,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-25 03:26:41,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6d427d7d/ef8a5334227b468ab8fcfb32749f6bf0/FLAGcea68a929 [2020-09-25 03:26:42,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6d427d7d/ef8a5334227b468ab8fcfb32749f6bf0 [2020-09-25 03:26:42,256 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:26:42,261 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:26:42,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:26:42,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:26:42,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:26:42,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b495c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42, skipping insertion in model container [2020-09-25 03:26:42,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:26:42,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:26:42,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:26:42,550 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:26:42,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:26:42,582 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:26:42,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42 WrapperNode [2020-09-25 03:26:42,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:26:42,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:26:42,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:26:42,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:26:42,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:26:42,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:26:42,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:26:42,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:26:42,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:26:42,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:26:42,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:26:42,786 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:26:42,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:26:42,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:26:42,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:26:42,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 03:26:42,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:26:42,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:26:42,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:26:43,003 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:26:43,003 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 03:26:43,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:26:43 BoogieIcfgContainer [2020-09-25 03:26:43,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:26:43,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:26:43,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:26:43,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:26:43,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:26:42" (1/3) ... [2020-09-25 03:26:43,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a45c155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:26:43, skipping insertion in model container [2020-09-25 03:26:43,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (2/3) ... [2020-09-25 03:26:43,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a45c155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:26:43, skipping insertion in model container [2020-09-25 03:26:43,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:26:43" (3/3) ... [2020-09-25 03:26:43,019 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-25 03:26:43,032 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:26:43,043 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:26:43,080 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:26:43,136 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:26:43,136 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:26:43,137 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:26:43,137 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:26:43,137 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:26:43,137 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:26:43,137 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:26:43,137 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:26:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-25 03:26:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 03:26:43,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:43,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:43,174 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:43,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:43,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1882057920, now seen corresponding path program 1 times [2020-09-25 03:26:43,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:43,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828559602] [2020-09-25 03:26:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:43,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:43,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 03:26:43,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:26:43,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-09-25 03:26:43,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:26:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:26:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 03:26:43,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 03:26:43,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:43,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:43,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:43,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:43,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:26:43,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:43,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:43,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:43,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:43,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:43,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828559602] [2020-09-25 03:26:43,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:26:43,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:26:43,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577542564] [2020-09-25 03:26:43,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:26:43,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:43,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:26:43,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:26:43,671 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-09-25 03:26:43,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:43,770 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-09-25 03:26:43,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 03:26:43,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-25 03:26:43,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:43,782 INFO L225 Difference]: With dead ends: 50 [2020-09-25 03:26:43,783 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 03:26:43,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:26:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 03:26:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-25 03:26:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-25 03:26:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-25 03:26:43,833 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-09-25 03:26:43,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:43,833 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-25 03:26:43,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:26:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-25 03:26:43,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 03:26:43,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:43,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:43,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:26:43,836 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:43,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1535432394, now seen corresponding path program 1 times [2020-09-25 03:26:43,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:43,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459492594] [2020-09-25 03:26:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:43,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:44,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:44,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 03:26:44,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:44,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-09-25 03:26:44,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:44,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 03:26:44,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:26:44,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 03:26:44,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:44,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:44,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:44,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:44,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:44,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:44,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:26:44,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:44,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:44,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:44,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:44,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:44,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459492594] [2020-09-25 03:26:44,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:44,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 03:26:44,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269940917] [2020-09-25 03:26:44,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 03:26:44,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:44,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 03:26:44,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:26:44,664 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-09-25 03:26:44,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:44,881 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-09-25 03:26:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 03:26:44,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-25 03:26:44,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:44,883 INFO L225 Difference]: With dead ends: 48 [2020-09-25 03:26:44,883 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 03:26:44,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-25 03:26:44,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 03:26:44,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-25 03:26:44,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 03:26:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-25 03:26:44,892 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-09-25 03:26:44,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:44,892 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-25 03:26:44,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 03:26:44,893 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-25 03:26:44,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 03:26:44,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:44,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:44,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:26:44,895 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:44,895 INFO L82 PathProgramCache]: Analyzing trace with hash -927596731, now seen corresponding path program 1 times [2020-09-25 03:26:44,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:44,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961801330] [2020-09-25 03:26:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:44,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:45,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:45,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 03:26:45,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:45,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-25 03:26:45,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:45,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:26:45,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 03:26:45,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 03:26:45,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:45,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:45,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:45,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:45,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:45,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:45,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:45,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:45,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:45,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:45,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:45,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:45,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961801330] [2020-09-25 03:26:45,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:45,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 03:26:45,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227277593] [2020-09-25 03:26:45,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:26:45,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:45,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:26:45,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:26:45,046 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-25 03:26:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:45,109 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-09-25 03:26:45,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 03:26:45,110 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-25 03:26:45,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:45,111 INFO L225 Difference]: With dead ends: 42 [2020-09-25 03:26:45,112 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 03:26:45,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 03:26:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 03:26:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-25 03:26:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 03:26:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-25 03:26:45,119 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-09-25 03:26:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:45,120 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-25 03:26:45,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:26:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-25 03:26:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 03:26:45,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:45,121 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:45,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:26:45,122 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:45,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:45,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1778100254, now seen corresponding path program 2 times [2020-09-25 03:26:45,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:45,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360236164] [2020-09-25 03:26:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:45,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:45,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:45,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 03:26:45,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:45,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-09-25 03:26:45,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:45,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 03:26:45,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:26:45,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 03:26:45,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:45,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:45,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:45,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:45,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:45,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:45,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:26:45,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:45,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:45,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360236164] [2020-09-25 03:26:45,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:45,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 03:26:45,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130375372] [2020-09-25 03:26:45,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 03:26:45,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:45,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 03:26:45,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-25 03:26:45,724 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-25 03:26:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:46,157 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-25 03:26:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 03:26:46,158 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-25 03:26:46,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:46,159 INFO L225 Difference]: With dead ends: 42 [2020-09-25 03:26:46,159 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 03:26:46,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-25 03:26:46,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 03:26:46,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-09-25 03:26:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 03:26:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-25 03:26:46,167 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2020-09-25 03:26:46,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:46,167 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-25 03:26:46,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 03:26:46,168 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-25 03:26:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 03:26:46,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:46,169 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:46,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:26:46,169 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:46,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:46,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1884066515, now seen corresponding path program 2 times [2020-09-25 03:26:46,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:46,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19963332] [2020-09-25 03:26:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:46,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:46,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:46,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 03:26:46,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:46,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-09-25 03:26:46,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:46,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:26:46,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 03:26:46,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 03:26:46,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:46,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:46,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:46,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:46,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:46,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:46,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:46,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:46,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:46,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19963332] [2020-09-25 03:26:46,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:46,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 03:26:46,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476166734] [2020-09-25 03:26:46,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 03:26:46,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:46,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 03:26:46,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 03:26:46,335 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-25 03:26:46,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:46,420 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-09-25 03:26:46,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 03:26:46,420 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-25 03:26:46,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:46,421 INFO L225 Difference]: With dead ends: 48 [2020-09-25 03:26:46,422 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 03:26:46,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:26:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 03:26:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-25 03:26:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 03:26:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-25 03:26:46,428 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-09-25 03:26:46,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:46,429 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-25 03:26:46,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 03:26:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-25 03:26:46,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 03:26:46,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:46,430 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:46,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:26:46,431 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:46,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1363892486, now seen corresponding path program 3 times [2020-09-25 03:26:46,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:46,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116511172] [2020-09-25 03:26:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:46,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:46,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:46,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 03:26:46,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:46,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-09-25 03:26:46,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:46,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 03:26:46,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:26:46,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 03:26:46,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:47,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:47,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:47,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:47,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:47,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:47,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:47,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:47,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 03:26:47,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116511172] [2020-09-25 03:26:47,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:47,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 03:26:47,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959069253] [2020-09-25 03:26:47,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 03:26:47,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:47,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 03:26:47,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:26:47,080 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-25 03:26:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:47,446 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-09-25 03:26:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 03:26:47,447 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-25 03:26:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:47,448 INFO L225 Difference]: With dead ends: 47 [2020-09-25 03:26:47,448 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 03:26:47,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-25 03:26:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 03:26:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-25 03:26:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-25 03:26:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-25 03:26:47,460 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-09-25 03:26:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:47,461 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-25 03:26:47,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 03:26:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-25 03:26:47,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 03:26:47,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:47,463 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:47,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:26:47,466 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:47,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1557187861, now seen corresponding path program 3 times [2020-09-25 03:26:47,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:47,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194049929] [2020-09-25 03:26:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:47,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 03:26:47,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:47,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-09-25 03:26:47,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:26:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 03:26:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 03:26:47,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:47,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:47,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:47,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:47,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:26:47,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:47,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:47,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194049929] [2020-09-25 03:26:47,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:47,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 03:26:47,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658064342] [2020-09-25 03:26:47,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 03:26:47,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:47,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 03:26:47,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:26:47,743 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-09-25 03:26:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:47,850 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-25 03:26:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 03:26:47,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-25 03:26:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:47,852 INFO L225 Difference]: With dead ends: 60 [2020-09-25 03:26:47,852 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 03:26:47,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-25 03:26:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 03:26:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-25 03:26:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 03:26:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-25 03:26:47,858 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-09-25 03:26:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:47,859 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-25 03:26:47,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 03:26:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-25 03:26:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 03:26:47,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:47,860 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:47,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:26:47,861 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2133811459, now seen corresponding path program 4 times [2020-09-25 03:26:47,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:47,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252752950] [2020-09-25 03:26:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:48,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 03:26:48,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:48,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-09-25 03:26:48,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:48,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 03:26:48,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 03:26:48,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 03:26:48,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:48,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:48,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:48,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:48,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:48,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:26:48,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:48,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:48,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:48,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:48,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:48,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252752950] [2020-09-25 03:26:48,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:48,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 03:26:48,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731035459] [2020-09-25 03:26:48,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 03:26:48,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:48,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 03:26:48,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:26:48,191 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-09-25 03:26:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:48,368 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-25 03:26:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 03:26:48,368 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-25 03:26:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:48,369 INFO L225 Difference]: With dead ends: 66 [2020-09-25 03:26:48,369 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 03:26:48,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-25 03:26:48,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 03:26:48,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-25 03:26:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 03:26:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-25 03:26:48,380 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-09-25 03:26:48,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:48,381 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-25 03:26:48,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 03:26:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-25 03:26:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 03:26:48,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:48,382 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:48,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 03:26:48,385 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:48,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:48,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1351967461, now seen corresponding path program 5 times [2020-09-25 03:26:48,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:48,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126234182] [2020-09-25 03:26:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:48,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:48,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 03:26:48,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:48,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-09-25 03:26:48,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:48,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 03:26:48,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 03:26:48,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 03:26:48,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:48,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:48,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:48,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:48,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:48,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:26:48,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:48,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:48,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:48,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:48,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:48,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126234182] [2020-09-25 03:26:48,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:48,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 03:26:48,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362730743] [2020-09-25 03:26:48,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 03:26:48,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:48,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 03:26:48,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:26:48,860 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-09-25 03:26:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:49,110 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-09-25 03:26:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 03:26:49,112 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-25 03:26:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:49,116 INFO L225 Difference]: With dead ends: 72 [2020-09-25 03:26:49,116 INFO L226 Difference]: Without dead ends: 61 [2020-09-25 03:26:49,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-25 03:26:49,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-25 03:26:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-25 03:26:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 03:26:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 03:26:49,131 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-09-25 03:26:49,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:49,132 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 03:26:49,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 03:26:49,132 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 03:26:49,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 03:26:49,133 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:49,133 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:49,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 03:26:49,134 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:49,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1927178035, now seen corresponding path program 6 times [2020-09-25 03:26:49,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:49,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873308170] [2020-09-25 03:26:49,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:49,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:49,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:49,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 03:26:49,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:49,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-09-25 03:26:49,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:49,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 03:26:49,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 03:26:49,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 03:26:49,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:49,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:49,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:49,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:49,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:49,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:49,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:49,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:49,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:49,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:49,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:49,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:49,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873308170] [2020-09-25 03:26:49,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:49,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 03:26:49,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000092745] [2020-09-25 03:26:49,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 03:26:49,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:49,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 03:26:49,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-25 03:26:49,726 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-09-25 03:26:50,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:50,032 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-25 03:26:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 03:26:50,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-09-25 03:26:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:50,034 INFO L225 Difference]: With dead ends: 78 [2020-09-25 03:26:50,034 INFO L226 Difference]: Without dead ends: 67 [2020-09-25 03:26:50,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-25 03:26:50,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-25 03:26:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-25 03:26:50,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 03:26:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-25 03:26:50,049 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-09-25 03:26:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:50,050 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-25 03:26:50,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 03:26:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-25 03:26:50,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 03:26:50,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:50,056 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:50,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 03:26:50,057 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:50,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:50,057 INFO L82 PathProgramCache]: Analyzing trace with hash -879247179, now seen corresponding path program 7 times [2020-09-25 03:26:50,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:50,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50987271] [2020-09-25 03:26:50,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:50,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:50,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:50,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 03:26:50,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:50,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-09-25 03:26:50,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:50,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 03:26:50,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 03:26:50,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 03:26:50,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:50,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:50,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:50,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:50,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:50,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:50,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:50,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:50,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:50,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:50,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:50,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:50,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50987271] [2020-09-25 03:26:50,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:50,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 03:26:50,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063322692] [2020-09-25 03:26:50,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 03:26:50,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:50,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 03:26:50,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 03:26:50,782 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-09-25 03:26:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:51,082 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-09-25 03:26:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 03:26:51,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-09-25 03:26:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:51,084 INFO L225 Difference]: With dead ends: 84 [2020-09-25 03:26:51,084 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 03:26:51,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-25 03:26:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 03:26:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-09-25 03:26:51,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 03:26:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-25 03:26:51,096 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-09-25 03:26:51,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:51,097 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-25 03:26:51,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 03:26:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-25 03:26:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 03:26:51,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:51,098 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:51,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 03:26:51,099 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:51,100 INFO L82 PathProgramCache]: Analyzing trace with hash -583378275, now seen corresponding path program 8 times [2020-09-25 03:26:51,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:51,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22153410] [2020-09-25 03:26:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:51,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:51,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:51,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 03:26:51,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:51,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-09-25 03:26:51,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:51,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 03:26:51,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 03:26:51,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 03:26:51,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:51,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:51,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:51,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:51,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:51,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:51,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:26:51,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:51,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:51,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22153410] [2020-09-25 03:26:51,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:51,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 03:26:51,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515890296] [2020-09-25 03:26:51,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 03:26:51,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:51,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 03:26:51,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-25 03:26:51,967 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-09-25 03:26:52,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:52,325 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-09-25 03:26:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 03:26:52,326 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-09-25 03:26:52,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:52,327 INFO L225 Difference]: With dead ends: 89 [2020-09-25 03:26:52,327 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 03:26:52,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 03:26:52,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 03:26:52,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-25 03:26:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 03:26:52,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-25 03:26:52,335 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-09-25 03:26:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:52,335 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-25 03:26:52,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 03:26:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-25 03:26:52,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-25 03:26:52,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:52,337 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:52,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 03:26:52,337 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:52,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:52,338 INFO L82 PathProgramCache]: Analyzing trace with hash 929818245, now seen corresponding path program 9 times [2020-09-25 03:26:52,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:52,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936993187] [2020-09-25 03:26:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 03:26:52,357 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 03:26:52,357 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 03:26:52,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 03:26:52,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 03:26:52 BoogieIcfgContainer [2020-09-25 03:26:52,385 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 03:26:52,389 INFO L168 Benchmark]: Toolchain (without parser) took 10129.46 ms. Allocated memory was 141.6 MB in the beginning and 294.1 MB in the end (delta: 152.6 MB). Free memory was 104.8 MB in the beginning and 190.6 MB in the end (delta: -85.7 MB). Peak memory consumption was 66.9 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:52,390 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-25 03:26:52,391 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.88 ms. Allocated memory is still 141.6 MB. Free memory was 104.2 MB in the beginning and 94.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:52,392 INFO L168 Benchmark]: Boogie Preprocessor took 127.38 ms. Allocated memory was 141.6 MB in the beginning and 203.4 MB in the end (delta: 61.9 MB). Free memory was 94.9 MB in the beginning and 182.6 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:52,393 INFO L168 Benchmark]: RCFGBuilder took 297.22 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:52,394 INFO L168 Benchmark]: TraceAbstraction took 9375.38 ms. Allocated memory was 203.4 MB in the beginning and 294.1 MB in the end (delta: 90.7 MB). Free memory was 169.8 MB in the beginning and 190.6 MB in the end (delta: -20.8 MB). Peak memory consumption was 69.9 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:52,397 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.88 ms. Allocated memory is still 141.6 MB. Free memory was 104.2 MB in the beginning and 94.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.38 ms. Allocated memory was 141.6 MB in the beginning and 203.4 MB in the end (delta: 61.9 MB). Free memory was 94.9 MB in the beginning and 182.6 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 297.22 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9375.38 ms. Allocated memory was 203.4 MB in the beginning and 294.1 MB in the end (delta: 90.7 MB). Free memory was 169.8 MB in the beginning and 190.6 MB in the end (delta: -20.8 MB). Peak memory consumption was 69.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, 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, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.2s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 200 SDtfs, 192 SDslu, 1453 SDs, 0 SdLazy, 865 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 262 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=12, 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, 12 MinimizatonAttempts, 32 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 533 NumberOfCodeBlocks, 533 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 448 ConstructedInterpolants, 0 QuantifiedInterpolants, 60454 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 PerfectInterpolantSequences, 160/758 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...