/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 SequenceOfStatements --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/psyco/psyco_net_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 12:54:07,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 12:54:07,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 12:54:07,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 12:54:07,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 12:54:07,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 12:54:07,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 12:54:07,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 12:54:07,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 12:54:07,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 12:54:07,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 12:54:07,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 12:54:07,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 12:54:07,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 12:54:07,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 12:54:07,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 12:54:07,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 12:54:07,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 12:54:07,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 12:54:07,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 12:54:07,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 12:54:07,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 12:54:07,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 12:54:07,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 12:54:07,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 12:54:07,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 12:54:07,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 12:54:07,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 12:54:07,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 12:54:07,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 12:54:07,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 12:54:07,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 12:54:07,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 12:54:07,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 12:54:07,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 12:54:07,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 12:54:07,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 12:54:07,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 12:54:07,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 12:54:07,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 12:54:07,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 12:54:07,640 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 [2020-10-13 12:54:07,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 12:54:07,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 12:54:07,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 12:54:07,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 12:54:07,666 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 12:54:07,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 12:54:07,666 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 12:54:07,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 12:54:07,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 12:54:07,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 12:54:07,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 12:54:07,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 12:54:07,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 12:54:07,667 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 12:54:07,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 12:54:07,668 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 12:54:07,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 12:54:07,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 12:54:07,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 12:54:07,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 12:54:07,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 12:54:07,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 12:54:07,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 12:54:07,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 12:54:07,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 12:54:07,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 12:54:07,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 12:54:07,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 12:54:07,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 12:54:07,671 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 -> SequenceOfStatements 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 12:54:07,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 12:54:08,007 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 12:54:08,019 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 12:54:08,022 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 12:54:08,023 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 12:54:08,024 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_net_1.c [2020-10-13 12:54:08,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83c5538aa/b920faed6f294958a6e647eda3a19e07/FLAGdc195bc13 [2020-10-13 12:54:09,267 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 12:54:09,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/psyco/psyco_net_1.c [2020-10-13 12:54:09,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83c5538aa/b920faed6f294958a6e647eda3a19e07/FLAGdc195bc13 [2020-10-13 12:54:09,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83c5538aa/b920faed6f294958a6e647eda3a19e07 [2020-10-13 12:54:09,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 12:54:09,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 12:54:09,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 12:54:09,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 12:54:09,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 12:54:09,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:54:09" (1/1) ... [2020-10-13 12:54:09,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30fbc2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:09, skipping insertion in model container [2020-10-13 12:54:09,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:54:09" (1/1) ... [2020-10-13 12:54:09,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 12:54:10,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 12:54:12,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 12:54:12,154 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 12:54:13,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 12:54:13,463 INFO L208 MainTranslator]: Completed translation [2020-10-13 12:54:13,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:13 WrapperNode [2020-10-13 12:54:13,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 12:54:13,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 12:54:13,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 12:54:13,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 12:54:13,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:13" (1/1) ... [2020-10-13 12:54:13,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:13" (1/1) ... [2020-10-13 12:54:13,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:13" (1/1) ... [2020-10-13 12:54:13,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:13" (1/1) ... [2020-10-13 12:54:14,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:13" (1/1) ... [2020-10-13 12:54:15,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:13" (1/1) ... [2020-10-13 12:54:15,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:13" (1/1) ... [2020-10-13 12:54:15,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 12:54:15,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 12:54:15,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 12:54:15,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 12:54:15,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:13" (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 [2020-10-13 12:54:15,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 12:54:15,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 12:54:15,421 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 12:54:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 12:54:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 12:54:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 12:54:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 12:54:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 12:54:34,304 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 12:54:34,304 INFO L295 CfgBuilder]: Removed 1130 assume(true) statements. [2020-10-13 12:54:34,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:54:34 BoogieIcfgContainer [2020-10-13 12:54:34,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 12:54:34,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 12:54:34,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 12:54:34,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 12:54:34,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:54:09" (1/3) ... [2020-10-13 12:54:34,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acd41b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:54:34, skipping insertion in model container [2020-10-13 12:54:34,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:13" (2/3) ... [2020-10-13 12:54:34,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acd41b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:54:34, skipping insertion in model container [2020-10-13 12:54:34,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:54:34" (3/3) ... [2020-10-13 12:54:34,346 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_net_1.c [2020-10-13 12:54:34,357 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 12:54:34,370 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 12:54:34,387 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 12:54:34,441 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 12:54:34,441 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 12:54:34,441 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 12:54:34,441 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 12:54:34,441 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 12:54:34,442 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 12:54:34,442 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 12:54:34,442 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 12:54:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states. [2020-10-13 12:54:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 12:54:34,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:34,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:34,576 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:34,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2089661630, now seen corresponding path program 1 times [2020-10-13 12:54:34,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:34,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623536493] [2020-10-13 12:54:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:35,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:35,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 12:54:35,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:35,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-13 12:54:35,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:35,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:35,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 12:54:35,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:35,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 12:54:35,449 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 12:54:35,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:35,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:35,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:35,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:35,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 12:54:35,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:35,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:54:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:54:35,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623536493] [2020-10-13 12:54:35,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:54:35,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 12:54:35,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746970365] [2020-10-13 12:54:35,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 12:54:35,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:35,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 12:54:35,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 12:54:35,543 INFO L87 Difference]: Start difference. First operand 9216 states. Second operand 3 states. [2020-10-13 12:54:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:54:36,109 INFO L93 Difference]: Finished difference Result 17704 states and 35386 transitions. [2020-10-13 12:54:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 12:54:36,112 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 12:54:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:54:36,189 INFO L225 Difference]: With dead ends: 17704 [2020-10-13 12:54:36,190 INFO L226 Difference]: Without dead ends: 8284 [2020-10-13 12:54:36,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 12:54:36,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2020-10-13 12:54:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 8284. [2020-10-13 12:54:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8284 states. [2020-10-13 12:54:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 13001 transitions. [2020-10-13 12:54:36,544 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 13001 transitions. Word has length 13 [2020-10-13 12:54:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:54:36,545 INFO L479 AbstractCegarLoop]: Abstraction has 8284 states and 13001 transitions. [2020-10-13 12:54:36,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 12:54:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 13001 transitions. [2020-10-13 12:54:36,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 12:54:36,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:54:36,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:54:36,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 12:54:36,548 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:54:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:54:36,548 INFO L82 PathProgramCache]: Analyzing trace with hash 886062589, now seen corresponding path program 1 times [2020-10-13 12:54:36,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:54:36,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116799257] [2020-10-13 12:54:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:54:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:36,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:36,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:36,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:36,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 12:54:36,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:54:36,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-13 12:54:36,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:36,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:54:36,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 12:54:36,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 12:54:36,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 12:54:37,453 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 12:54:37,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:54:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:54:37,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:54:37,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:54:37,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:54:37,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:54:37,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 12:54:37,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:54:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:54:37,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:54:37,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:54:37,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 12:54:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:54:37,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116799257] [2020-10-13 12:54:37,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:54:37,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:54:37,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514543766] [2020-10-13 12:54:37,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:54:37,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:54:37,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:54:37,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:54:37,522 INFO L87 Difference]: Start difference. First operand 8284 states and 13001 transitions. Second operand 4 states. [2020-10-13 12:54:37,910 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 12:55:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:21,012 INFO L93 Difference]: Finished difference Result 16565 states and 26000 transitions. [2020-10-13 12:55:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:55:21,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 12:55:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:21,056 INFO L225 Difference]: With dead ends: 16565 [2020-10-13 12:55:21,056 INFO L226 Difference]: Without dead ends: 8287 [2020-10-13 12:55:21,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:55:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8287 states. [2020-10-13 12:55:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8287 to 8287. [2020-10-13 12:55:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8287 states. [2020-10-13 12:55:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8287 states to 8287 states and 13004 transitions. [2020-10-13 12:55:21,243 INFO L78 Accepts]: Start accepts. Automaton has 8287 states and 13004 transitions. Word has length 14 [2020-10-13 12:55:21,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:21,244 INFO L479 AbstractCegarLoop]: Abstraction has 8287 states and 13004 transitions. [2020-10-13 12:55:21,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:55:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 8287 states and 13004 transitions. [2020-10-13 12:55:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 12:55:21,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:21,246 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:21,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 12:55:21,246 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:21,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1585116607, now seen corresponding path program 1 times [2020-10-13 12:55:21,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:21,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901271284] [2020-10-13 12:55:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:21,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:21,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:21,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 12:55:21,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:21,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-13 12:55:21,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:21,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:55:21,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 12:55:21,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 12:55:21,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:21,669 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 12:55:21,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:21,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:21,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:21,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:55:21,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:21,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 12:55:21,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:21,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:21,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:21,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:21,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:55:21,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901271284] [2020-10-13 12:55:21,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:55:21,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:55:21,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796963957] [2020-10-13 12:55:21,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:55:21,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:55:21,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:55:21,728 INFO L87 Difference]: Start difference. First operand 8287 states and 13004 transitions. Second operand 4 states. [2020-10-13 12:55:21,947 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 12:55:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:27,354 INFO L93 Difference]: Finished difference Result 16460 states and 25849 transitions. [2020-10-13 12:55:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:55:27,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 12:55:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:27,395 INFO L225 Difference]: With dead ends: 16460 [2020-10-13 12:55:27,395 INFO L226 Difference]: Without dead ends: 8180 [2020-10-13 12:55:27,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:55:27,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8180 states. [2020-10-13 12:55:27,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8180 to 8180. [2020-10-13 12:55:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8180 states. [2020-10-13 12:55:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8180 states to 8180 states and 12850 transitions. [2020-10-13 12:55:27,561 INFO L78 Accepts]: Start accepts. Automaton has 8180 states and 12850 transitions. Word has length 19 [2020-10-13 12:55:27,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:27,561 INFO L479 AbstractCegarLoop]: Abstraction has 8180 states and 12850 transitions. [2020-10-13 12:55:27,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:55:27,561 INFO L276 IsEmpty]: Start isEmpty. Operand 8180 states and 12850 transitions. [2020-10-13 12:55:27,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 12:55:27,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:27,563 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:27,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 12:55:27,563 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:27,564 INFO L82 PathProgramCache]: Analyzing trace with hash -90884306, now seen corresponding path program 1 times [2020-10-13 12:55:27,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:27,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145930598] [2020-10-13 12:55:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:27,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:27,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:27,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 12:55:27,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:27,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-13 12:55:27,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:27,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:55:27,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 12:55:27,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 12:55:27,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:27,925 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 12:55:27,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:27,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:27,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:27,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:55:27,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:27,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 12:55:27,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:27,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:27,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:27,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:27,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:55:27,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145930598] [2020-10-13 12:55:27,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:55:27,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:55:27,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604979602] [2020-10-13 12:55:27,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:55:27,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:27,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:55:27,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:55:27,975 INFO L87 Difference]: Start difference. First operand 8180 states and 12850 transitions. Second operand 4 states. [2020-10-13 12:55:28,162 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 12:55:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:39,922 INFO L93 Difference]: Finished difference Result 16268 states and 25567 transitions. [2020-10-13 12:55:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:55:39,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-13 12:55:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:39,951 INFO L225 Difference]: With dead ends: 16268 [2020-10-13 12:55:39,951 INFO L226 Difference]: Without dead ends: 8060 [2020-10-13 12:55:39,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:55:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2020-10-13 12:55:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 8060. [2020-10-13 12:55:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8060 states. [2020-10-13 12:55:40,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8060 states to 8060 states and 12230 transitions. [2020-10-13 12:55:40,101 INFO L78 Accepts]: Start accepts. Automaton has 8060 states and 12230 transitions. Word has length 23 [2020-10-13 12:55:40,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:40,102 INFO L479 AbstractCegarLoop]: Abstraction has 8060 states and 12230 transitions. [2020-10-13 12:55:40,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:55:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 8060 states and 12230 transitions. [2020-10-13 12:55:40,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 12:55:40,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:40,104 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:40,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 12:55:40,105 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:40,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2991053, now seen corresponding path program 1 times [2020-10-13 12:55:40,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:40,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438941686] [2020-10-13 12:55:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:40,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:40,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:40,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:40,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 12:55:40,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:55:40,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-13 12:55:40,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:55:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 12:55:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 12:55:40,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:40,569 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 12:55:40,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:40,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:40,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:40,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:55:40,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:40,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 12:55:40,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:40,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:40,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:40,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:40,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:55:40,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438941686] [2020-10-13 12:55:40,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:55:40,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:55:40,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245160251] [2020-10-13 12:55:40,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:55:40,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:40,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:55:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:55:40,598 INFO L87 Difference]: Start difference. First operand 8060 states and 12230 transitions. Second operand 4 states. [2020-10-13 12:55:40,857 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 12:56:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:56:20,282 INFO L93 Difference]: Finished difference Result 16114 states and 24453 transitions. [2020-10-13 12:56:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:56:20,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-13 12:56:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:56:20,303 INFO L225 Difference]: With dead ends: 16114 [2020-10-13 12:56:20,303 INFO L226 Difference]: Without dead ends: 8066 [2020-10-13 12:56:20,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:56:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8066 states. [2020-10-13 12:56:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8066 to 8064. [2020-10-13 12:56:20,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8064 states. [2020-10-13 12:56:20,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8064 states to 8064 states and 12234 transitions. [2020-10-13 12:56:20,451 INFO L78 Accepts]: Start accepts. Automaton has 8064 states and 12234 transitions. Word has length 26 [2020-10-13 12:56:20,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:56:20,452 INFO L479 AbstractCegarLoop]: Abstraction has 8064 states and 12234 transitions. [2020-10-13 12:56:20,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:56:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 8064 states and 12234 transitions. [2020-10-13 12:56:20,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 12:56:20,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:56:20,453 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:56:20,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 12:56:20,453 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:56:20,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:56:20,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1847963214, now seen corresponding path program 1 times [2020-10-13 12:56:20,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:56:20,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090194540] [2020-10-13 12:56:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:56:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:56:20,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:56:20,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:56:20,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 12:56:20,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:56:20,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-13 12:56:20,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:56:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:56:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 12:56:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 12:56:20,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:56:20,945 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 12:56:20,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:56:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:56:20,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:56:20,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:56:20,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:56:20,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:56:20,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 12:56:20,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:56:20,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:56:20,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:56:20,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:56:20,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:56:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:56:20,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090194540] [2020-10-13 12:56:20,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:56:20,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:56:20,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177502972] [2020-10-13 12:56:20,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:56:20,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:56:20,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:56:20,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:56:20,982 INFO L87 Difference]: Start difference. First operand 8064 states and 12234 transitions. Second operand 4 states. [2020-10-13 12:56:21,192 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 12:57:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:57:09,044 INFO L93 Difference]: Finished difference Result 24168 states and 36676 transitions. [2020-10-13 12:57:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:57:09,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-13 12:57:09,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:57:09,079 INFO L225 Difference]: With dead ends: 24168 [2020-10-13 12:57:09,080 INFO L226 Difference]: Without dead ends: 16068 [2020-10-13 12:57:09,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:57:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16068 states. [2020-10-13 12:57:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16068 to 14810. [2020-10-13 12:57:09,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14810 states. [2020-10-13 12:57:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14810 states to 14810 states and 23046 transitions. [2020-10-13 12:57:09,358 INFO L78 Accepts]: Start accepts. Automaton has 14810 states and 23046 transitions. Word has length 27 [2020-10-13 12:57:09,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:57:09,358 INFO L479 AbstractCegarLoop]: Abstraction has 14810 states and 23046 transitions. [2020-10-13 12:57:09,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:57:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 14810 states and 23046 transitions. [2020-10-13 12:57:09,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 12:57:09,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:57:09,360 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:57:09,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 12:57:09,361 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:57:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:57:09,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1901804161, now seen corresponding path program 1 times [2020-10-13 12:57:09,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:57:09,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792703449] [2020-10-13 12:57:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:57:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:57:09,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:57:09,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:57:09,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 12:57:09,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:57:09,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-13 12:57:09,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:57:09,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:57:09,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 12:57:09,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 12:57:09,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:57:09,790 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 12:57:09,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:57:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:57:09,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:57:09,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:57:09,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:57:09,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:57:09,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 12:57:09,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:57:09,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:57:09,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:57:09,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:57:09,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:57:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:57:09,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792703449] [2020-10-13 12:57:09,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:57:09,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:57:09,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280501196] [2020-10-13 12:57:09,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:57:09,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:57:09,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:57:09,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:57:09,834 INFO L87 Difference]: Start difference. First operand 14810 states and 23046 transitions. Second operand 4 states. [2020-10-13 12:57:10,063 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-13 12:58:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:58:03,748 INFO L93 Difference]: Finished difference Result 37340 states and 57908 transitions. [2020-10-13 12:58:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 12:58:03,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-13 12:58:03,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:58:03,796 INFO L225 Difference]: With dead ends: 37340 [2020-10-13 12:58:03,796 INFO L226 Difference]: Without dead ends: 22270 [2020-10-13 12:58:03,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 12:58:03,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22270 states. [2020-10-13 12:58:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22270 to 21076. [2020-10-13 12:58:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21076 states. [2020-10-13 12:58:04,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21076 states to 21076 states and 32688 transitions. [2020-10-13 12:58:04,165 INFO L78 Accepts]: Start accepts. Automaton has 21076 states and 32688 transitions. Word has length 29 [2020-10-13 12:58:04,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:58:04,165 INFO L479 AbstractCegarLoop]: Abstraction has 21076 states and 32688 transitions. [2020-10-13 12:58:04,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 12:58:04,165 INFO L276 IsEmpty]: Start isEmpty. Operand 21076 states and 32688 transitions. [2020-10-13 12:58:04,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 12:58:04,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:58:04,167 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:58:04,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 12:58:04,167 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:58:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:58:04,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1134426699, now seen corresponding path program 1 times [2020-10-13 12:58:04,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:58:04,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049219010] [2020-10-13 12:58:04,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:58:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:58:04,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:58:04,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:58:04,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 12:58:04,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:58:04,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-13 12:58:04,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:58:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 12:58:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 12:58:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 12:58:04,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:58:04,577 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 12:58:04,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:58:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:58:04,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:58:04,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:58:04,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 12:58:04,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:58:04,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 12:58:04,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:58:04,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:58:04,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:58:04,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:58:04,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:58:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 12:58:04,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049219010] [2020-10-13 12:58:04,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:58:04,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 12:58:04,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231505489] [2020-10-13 12:58:04,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 12:58:04,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:58:04,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 12:58:04,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 12:58:04,619 INFO L87 Difference]: Start difference. First operand 21076 states and 32688 transitions. Second operand 4 states. [2020-10-13 12:58:04,816 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 174