/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:44:38,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:44:38,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:44:38,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:44:38,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:44:38,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:44:38,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:44:38,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:44:38,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:44:38,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:44:38,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:44:38,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:44:38,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:44:38,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:44:38,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:44:38,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:44:38,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:44:38,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:44:38,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:44:38,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:44:38,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:44:38,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:44:38,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:44:38,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:44:38,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:44:38,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:44:38,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:44:38,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:44:38,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:44:38,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:44:38,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:44:38,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:44:38,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:44:38,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:44:38,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:44:38,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:44:38,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:44:38,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:44:38,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:44:38,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:44:38,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:44:38,498 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 05:44:38,561 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:44:38,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:44:38,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:44:38,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:44:38,566 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:44:38,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:44:38,567 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:44:38,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:44:38,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:44:38,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:44:38,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:44:38,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:44:38,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:44:38,569 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:44:38,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:44:38,570 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:44:38,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:44:38,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:44:38,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:44:38,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:44:38,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:44:38,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:44:38,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:44:38,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:44:38,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:44:38,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:44:38,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:44:38,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:44:38,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:44:38,574 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:44:39,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:44:39,082 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:44:39,087 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:44:39,089 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:44:39,090 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:44:39,091 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 05:44:39,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00e0ee08d/7cb3d8ab6aaf4f61af8b25d6e45cfbad/FLAG06b1c319c [2020-09-25 05:44:39,717 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:44:39,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 05:44:39,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00e0ee08d/7cb3d8ab6aaf4f61af8b25d6e45cfbad/FLAG06b1c319c [2020-09-25 05:44:40,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00e0ee08d/7cb3d8ab6aaf4f61af8b25d6e45cfbad [2020-09-25 05:44:40,084 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:44:40,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:44:40,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:44:40,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:44:40,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:44:40,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:44:40" (1/1) ... [2020-09-25 05:44:40,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50050cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:40, skipping insertion in model container [2020-09-25 05:44:40,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:44:40" (1/1) ... [2020-09-25 05:44:40,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:44:40,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:44:40,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:44:40,350 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:44:40,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:44:40,389 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:44:40,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:40 WrapperNode [2020-09-25 05:44:40,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:44:40,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:44:40,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:44:40,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:44:40,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:40" (1/1) ... [2020-09-25 05:44:40,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:40" (1/1) ... [2020-09-25 05:44:40,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:40" (1/1) ... [2020-09-25 05:44:40,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:40" (1/1) ... [2020-09-25 05:44:40,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:40" (1/1) ... [2020-09-25 05:44:40,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:40" (1/1) ... [2020-09-25 05:44:40,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:40" (1/1) ... [2020-09-25 05:44:40,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:44:40,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:44:40,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:44:40,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:44:40,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:40" (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 05:44:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:44:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:44:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 05:44:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 05:44:40,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:44:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:44:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 05:44:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 05:44:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 05:44:40,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 05:44:40,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:44:40,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:44:40,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:44:40,825 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:44:40,826 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 05:44:40,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:44:40 BoogieIcfgContainer [2020-09-25 05:44:40,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:44:40,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:44:40,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:44:40,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:44:40,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:44:40" (1/3) ... [2020-09-25 05:44:40,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b7d7009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:44:40, skipping insertion in model container [2020-09-25 05:44:40,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:40" (2/3) ... [2020-09-25 05:44:40,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b7d7009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:44:40, skipping insertion in model container [2020-09-25 05:44:40,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:44:40" (3/3) ... [2020-09-25 05:44:40,869 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-25 05:44:40,897 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:44:40,911 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:44:40,932 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:44:40,959 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:44:40,960 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:44:40,960 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:44:40,960 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:44:40,960 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:44:40,961 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:44:40,961 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:44:40,961 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:44:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 05:44:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 05:44:40,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:40,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:40,992 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:40,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:40,999 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-25 05:44:41,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:41,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911075163] [2020-09-25 05:44:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:41,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:41,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:41,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:41,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 05:44:41,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:44:41,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-25 05:44:41,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:41,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 05:44:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:41,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 05:44:41,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:41,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:41,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:41,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:41,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:41,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:44:41,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:41,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:41,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:41,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:41,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:41,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:41,273 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 05:44:41,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911075163] [2020-09-25 05:44:41,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:44:41,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 05:44:41,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328210798] [2020-09-25 05:44:41,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 05:44:41,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:41,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 05:44:41,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 05:44:41,306 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 05:44:41,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:41,331 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-25 05:44:41,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 05:44:41,333 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-25 05:44:41,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:41,343 INFO L225 Difference]: With dead ends: 41 [2020-09-25 05:44:41,343 INFO L226 Difference]: Without dead ends: 22 [2020-09-25 05:44:41,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 05:44:41,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-25 05:44:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-25 05:44:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 05:44:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-25 05:44:41,391 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-09-25 05:44:41,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:41,392 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-25 05:44:41,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 05:44:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-25 05:44:41,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 05:44:41,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:41,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:41,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:44:41,394 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:41,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:41,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-09-25 05:44:41,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:41,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92542251] [2020-09-25 05:44:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:41,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:41,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:41,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:41,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:41,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 05:44:41,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 05:44:41,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-25 05:44:41,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:41,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:41,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:44:41,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:44:41,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 05:44:41,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:41,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:41,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:41,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:41,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:41,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:41,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:44:41,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:41,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:41,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:41,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:41,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:41,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:41,606 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 05:44:41,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92542251] [2020-09-25 05:44:41,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:44:41,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:44:41,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575517761] [2020-09-25 05:44:41,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:44:41,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:41,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:44:41,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:44:41,612 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-09-25 05:44:41,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:41,712 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-09-25 05:44:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:44:41,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-25 05:44:41,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:41,716 INFO L225 Difference]: With dead ends: 50 [2020-09-25 05:44:41,717 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 05:44:41,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:44:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 05:44:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-09-25 05:44:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 05:44:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-25 05:44:41,739 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-09-25 05:44:41,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:41,740 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-25 05:44:41,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:44:41,741 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-25 05:44:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 05:44:41,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:41,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:41,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:44:41,746 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:41,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:41,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1535220285, now seen corresponding path program 1 times [2020-09-25 05:44:41,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:41,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937947251] [2020-09-25 05:44:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:41,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:41,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:41,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 05:44:41,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:41,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-09-25 05:44:41,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:41,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:41,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 05:44:41,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:44:41,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 05:44:41,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:42,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:42,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:42,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:42,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:42,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:42,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:44:42,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:42,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:42,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:42,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:42,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:42,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:44:42,024 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 05:44:42,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937947251] [2020-09-25 05:44:42,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:44:42,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 05:44:42,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610350886] [2020-09-25 05:44:42,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 05:44:42,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:42,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 05:44:42,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:44:42,027 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-09-25 05:44:42,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:42,089 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-09-25 05:44:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 05:44:42,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-25 05:44:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:42,091 INFO L225 Difference]: With dead ends: 38 [2020-09-25 05:44:42,091 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 05:44:42,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 05:44:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 05:44:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-25 05:44:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 05:44:42,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-25 05:44:42,098 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2020-09-25 05:44:42,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:42,099 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-25 05:44:42,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 05:44:42,099 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-25 05:44:42,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 05:44:42,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:42,100 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] [2020-09-25 05:44:42,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:44:42,101 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:42,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:42,101 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-09-25 05:44:42,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:42,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535374621] [2020-09-25 05:44:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:42,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:42,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:42,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:42,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:42,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 05:44:42,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 05:44:42,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-09-25 05:44:42,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:42,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:42,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:44:42,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:44:42,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 05:44:42,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:44:42,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:42,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:42,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:42,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:42,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:42,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 05:44:42,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:42,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:42,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:42,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:42,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:42,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535374621] [2020-09-25 05:44:42,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:42,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:44:42,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035116743] [2020-09-25 05:44:42,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:44:42,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:42,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:44:42,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:44:42,429 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-25 05:44:42,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:42,490 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-09-25 05:44:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 05:44:42,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-25 05:44:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:42,492 INFO L225 Difference]: With dead ends: 59 [2020-09-25 05:44:42,492 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 05:44:42,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:44:42,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 05:44:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-09-25 05:44:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 05:44:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-25 05:44:42,499 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2020-09-25 05:44:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:42,499 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-25 05:44:42,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:44:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-25 05:44:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 05:44:42,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:42,501 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, 1] [2020-09-25 05:44:42,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:44:42,502 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:42,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:42,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1265709657, now seen corresponding path program 1 times [2020-09-25 05:44:42,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:42,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792413549] [2020-09-25 05:44:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:42,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:42,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:42,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 05:44:42,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:42,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-25 05:44:42,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:42,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:42,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:44:42,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:44:42,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 05:44:42,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:44:42,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:42,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:42,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:42,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:42,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:42,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:44:42,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:42,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:42,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:42,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792413549] [2020-09-25 05:44:42,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:42,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 05:44:42,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465624951] [2020-09-25 05:44:42,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 05:44:42,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:42,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 05:44:42,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:44:42,663 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-25 05:44:42,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:42,721 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-25 05:44:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 05:44:42,722 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-09-25 05:44:42,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:42,723 INFO L225 Difference]: With dead ends: 46 [2020-09-25 05:44:42,723 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 05:44:42,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:44:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 05:44:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-25 05:44:42,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 05:44:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 05:44:42,730 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2020-09-25 05:44:42,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:42,731 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 05:44:42,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 05:44:42,731 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 05:44:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 05:44:42,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:42,732 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:42,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 05:44:42,733 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:42,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:42,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 2 times [2020-09-25 05:44:42,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:42,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179288120] [2020-09-25 05:44:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:42,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:42,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:42,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:43,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:43,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:43,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:43,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 05:44:43,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 05:44:43,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-09-25 05:44:43,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:43,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:43,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 05:44:43,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:44:43,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 05:44:43,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:43,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:43,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:43,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:43,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:43,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:43,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:44:43,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:43,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:43,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:43,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:43,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:43,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:43,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179288120] [2020-09-25 05:44:43,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:43,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 05:44:43,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377501200] [2020-09-25 05:44:43,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 05:44:43,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:43,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 05:44:43,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:44:43,273 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 6 states. [2020-09-25 05:44:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:43,350 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-09-25 05:44:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 05:44:43,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-25 05:44:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:43,352 INFO L225 Difference]: With dead ends: 68 [2020-09-25 05:44:43,352 INFO L226 Difference]: Without dead ends: 52 [2020-09-25 05:44:43,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:44:43,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-25 05:44:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-09-25 05:44:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 05:44:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-25 05:44:43,360 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2020-09-25 05:44:43,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:43,361 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-25 05:44:43,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 05:44:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-25 05:44:43,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 05:44:43,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:43,363 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:43,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 05:44:43,363 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:43,364 INFO L82 PathProgramCache]: Analyzing trace with hash -34853245, now seen corresponding path program 2 times [2020-09-25 05:44:43,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:43,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179160638] [2020-09-25 05:44:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:43,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:43,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:43,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 05:44:43,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:43,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-25 05:44:43,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:43,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:43,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 05:44:43,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:44:43,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 05:44:43,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:43,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:43,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:43,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:43,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:43,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:43,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:44:43,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:43,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:43,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:43,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:43,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:43,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:43,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179160638] [2020-09-25 05:44:43,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:43,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 05:44:43,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842033267] [2020-09-25 05:44:43,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 05:44:43,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:43,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 05:44:43,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 05:44:43,599 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2020-09-25 05:44:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:43,689 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-25 05:44:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 05:44:43,689 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-09-25 05:44:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:43,690 INFO L225 Difference]: With dead ends: 55 [2020-09-25 05:44:43,690 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 05:44:43,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-25 05:44:43,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 05:44:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-25 05:44:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-25 05:44:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-25 05:44:43,697 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 35 [2020-09-25 05:44:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:43,697 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-25 05:44:43,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 05:44:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-25 05:44:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 05:44:43,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:43,699 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:43,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 05:44:43,700 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:43,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:43,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1854078698, now seen corresponding path program 3 times [2020-09-25 05:44:43,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:43,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133322627] [2020-09-25 05:44:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:43,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:43,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:43,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:44,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:44,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:44,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:44,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:44,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:44,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 05:44:44,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 05:44:44,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-09-25 05:44:44,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:44,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:44,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:44:44,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:44:44,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 05:44:44,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:44,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:44,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:44,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:44,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:44,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:44,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:44:44,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:44,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:44,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:44,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:44,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:44,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:44,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133322627] [2020-09-25 05:44:44,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:44,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 05:44:44,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652572222] [2020-09-25 05:44:44,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 05:44:44,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:44,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 05:44:44,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:44:44,495 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-09-25 05:44:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:44,578 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-09-25 05:44:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 05:44:44,579 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-25 05:44:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:44,580 INFO L225 Difference]: With dead ends: 77 [2020-09-25 05:44:44,580 INFO L226 Difference]: Without dead ends: 61 [2020-09-25 05:44:44,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:44:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-25 05:44:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-09-25 05:44:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 05:44:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-25 05:44:44,587 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 42 [2020-09-25 05:44:44,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:44,587 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-25 05:44:44,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 05:44:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-25 05:44:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 05:44:44,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:44,589 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:44,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 05:44:44,589 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:44,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:44,590 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 3 times [2020-09-25 05:44:44,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:44,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573723301] [2020-09-25 05:44:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:44,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:44,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:44,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 05:44:44,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:44,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-25 05:44:44,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:44,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:44,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 05:44:44,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:44:44,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 05:44:44,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:44:44,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:44,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:44,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:44,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:44,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:44,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:44:44,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:44,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:44,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:44,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:44,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:44,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:44,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573723301] [2020-09-25 05:44:44,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:44,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 05:44:44,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545545564] [2020-09-25 05:44:44,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 05:44:44,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:44,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 05:44:44,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:44:44,902 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2020-09-25 05:44:45,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:45,064 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-09-25 05:44:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 05:44:45,065 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-25 05:44:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:45,066 INFO L225 Difference]: With dead ends: 64 [2020-09-25 05:44:45,066 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 05:44:45,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-25 05:44:45,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 05:44:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-09-25 05:44:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-25 05:44:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-25 05:44:45,072 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2020-09-25 05:44:45,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:45,073 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-25 05:44:45,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 05:44:45,073 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-25 05:44:45,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 05:44:45,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:45,074 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:45,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 05:44:45,075 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:45,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:45,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 4 times [2020-09-25 05:44:45,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:45,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669033329] [2020-09-25 05:44:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:45,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:45,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:45,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:45,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:46,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:46,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:46,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:46,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:46,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:46,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 05:44:46,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:44:46,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1638 [2020-09-25 05:44:46,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:46,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:46,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 05:44:46,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:44:46,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 05:44:46,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:46,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:46,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:46,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:46,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:46,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:46,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:44:46,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:46,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:46,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:46,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:46,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:46,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:46,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669033329] [2020-09-25 05:44:46,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:46,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 05:44:46,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138553811] [2020-09-25 05:44:46,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 05:44:46,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:46,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 05:44:46,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 05:44:46,799 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 8 states. [2020-09-25 05:44:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:46,905 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-09-25 05:44:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 05:44:46,905 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-25 05:44:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:46,907 INFO L225 Difference]: With dead ends: 86 [2020-09-25 05:44:46,907 INFO L226 Difference]: Without dead ends: 70 [2020-09-25 05:44:46,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-25 05:44:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-25 05:44:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-09-25 05:44:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 05:44:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-25 05:44:46,914 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 51 [2020-09-25 05:44:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:46,915 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-25 05:44:46,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 05:44:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-25 05:44:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 05:44:46,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:46,917 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:46,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 05:44:46,917 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:46,918 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 4 times [2020-09-25 05:44:46,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:46,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122926460] [2020-09-25 05:44:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:46,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:47,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:47,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 05:44:47,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:47,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-09-25 05:44:47,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:47,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:47,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 05:44:47,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:44:47,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 05:44:47,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:47,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:47,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:47,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:47,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:47,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:47,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:44:47,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:47,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:47,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:47,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122926460] [2020-09-25 05:44:47,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:47,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 05:44:47,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454101222] [2020-09-25 05:44:47,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 05:44:47,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:47,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 05:44:47,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 05:44:47,422 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 12 states. [2020-09-25 05:44:47,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:47,594 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-09-25 05:44:47,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 05:44:47,594 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-25 05:44:47,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:47,595 INFO L225 Difference]: With dead ends: 73 [2020-09-25 05:44:47,595 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 05:44:47,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-25 05:44:47,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 05:44:47,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-09-25 05:44:47,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-25 05:44:47,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-25 05:44:47,602 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 53 [2020-09-25 05:44:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:47,602 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-25 05:44:47,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 05:44:47,602 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-25 05:44:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 05:44:47,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:47,604 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:47,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 05:44:47,604 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:47,604 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 5 times [2020-09-25 05:44:47,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:47,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265903333] [2020-09-25 05:44:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:47,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:47,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:47,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:48,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:48,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:48,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:49,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:49,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:49,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:49,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:49,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:49,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:49,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 05:44:49,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 05:44:49,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2210 [2020-09-25 05:44:49,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:49,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:49,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 05:44:49,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:44:49,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 05:44:49,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:49,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:49,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:49,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:49,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:49,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:49,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:44:49,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:49,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:49,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:49,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:49,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265903333] [2020-09-25 05:44:49,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:49,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 05:44:49,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090174826] [2020-09-25 05:44:49,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 05:44:49,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:49,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 05:44:49,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:44:49,913 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 9 states. [2020-09-25 05:44:50,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:50,055 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-09-25 05:44:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 05:44:50,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-09-25 05:44:50,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:50,057 INFO L225 Difference]: With dead ends: 95 [2020-09-25 05:44:50,057 INFO L226 Difference]: Without dead ends: 79 [2020-09-25 05:44:50,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-09-25 05:44:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-25 05:44:50,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-09-25 05:44:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-25 05:44:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-09-25 05:44:50,064 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2020-09-25 05:44:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:50,064 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-09-25 05:44:50,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 05:44:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-09-25 05:44:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 05:44:50,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:50,066 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:50,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 05:44:50,066 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:50,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:50,067 INFO L82 PathProgramCache]: Analyzing trace with hash -384565031, now seen corresponding path program 5 times [2020-09-25 05:44:50,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:50,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455295260] [2020-09-25 05:44:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:50,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:50,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:50,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 05:44:50,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:50,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-09-25 05:44:50,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:50,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:50,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 05:44:50,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:44:50,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-25 05:44:50,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:50,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:50,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:50,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:50,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:50,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:50,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:44:50,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:50,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:50,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:50,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:50,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:50,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:50,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455295260] [2020-09-25 05:44:50,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:50,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 05:44:50,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206651180] [2020-09-25 05:44:50,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 05:44:50,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:50,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 05:44:50,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-25 05:44:50,649 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 15 states. [2020-09-25 05:44:50,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:50,899 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-09-25 05:44:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 05:44:50,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-09-25 05:44:50,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:50,900 INFO L225 Difference]: With dead ends: 82 [2020-09-25 05:44:50,901 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 05:44:50,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-09-25 05:44:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 05:44:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-25 05:44:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-25 05:44:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-09-25 05:44:50,906 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 62 [2020-09-25 05:44:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:50,907 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-09-25 05:44:50,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 05:44:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-09-25 05:44:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 05:44:50,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:50,908 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:50,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 05:44:50,908 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:50,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 6 times [2020-09-25 05:44:50,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:50,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27896824] [2020-09-25 05:44:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:50,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:50,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:51,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:51,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:51,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:52,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:52,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:53,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:53,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:53,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:53,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:53,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:54,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:54,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 05:44:54,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 05:44:54,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3285 [2020-09-25 05:44:54,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:54,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:54,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 05:44:54,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:44:54,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 05:44:54,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:54,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:54,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:54,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:54,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:54,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:54,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:44:54,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:54,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:54,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:54,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:54,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:54,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:54,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27896824] [2020-09-25 05:44:54,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:54,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 05:44:54,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880653158] [2020-09-25 05:44:54,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 05:44:54,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 05:44:54,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-25 05:44:54,320 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 10 states. [2020-09-25 05:44:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:54,474 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-09-25 05:44:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 05:44:54,474 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-25 05:44:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:54,475 INFO L225 Difference]: With dead ends: 104 [2020-09-25 05:44:54,475 INFO L226 Difference]: Without dead ends: 88 [2020-09-25 05:44:54,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-09-25 05:44:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-25 05:44:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-09-25 05:44:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 05:44:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-09-25 05:44:54,487 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 69 [2020-09-25 05:44:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:54,488 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-09-25 05:44:54,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 05:44:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-09-25 05:44:54,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 05:44:54,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:54,491 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:54,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 05:44:54,491 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:54,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:54,492 INFO L82 PathProgramCache]: Analyzing trace with hash -733368317, now seen corresponding path program 6 times [2020-09-25 05:44:54,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:54,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901836798] [2020-09-25 05:44:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:54,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:54,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:54,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 05:44:54,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:54,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-09-25 05:44:54,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:54,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:54,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 05:44:54,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:44:54,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-25 05:44:54,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:55,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:55,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:55,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:55,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:44:55,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:55,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:44:55,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:55,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:55,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:55,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:55,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:55,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:55,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901836798] [2020-09-25 05:44:55,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:55,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 05:44:55,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803279283] [2020-09-25 05:44:55,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 05:44:55,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:55,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 05:44:55,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-25 05:44:55,116 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-09-25 05:44:55,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:55,450 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-09-25 05:44:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 05:44:55,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-09-25 05:44:55,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:55,451 INFO L225 Difference]: With dead ends: 91 [2020-09-25 05:44:55,451 INFO L226 Difference]: Without dead ends: 84 [2020-09-25 05:44:55,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-09-25 05:44:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-25 05:44:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-09-25 05:44:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 05:44:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-09-25 05:44:55,457 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 71 [2020-09-25 05:44:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:55,457 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-09-25 05:44:55,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 05:44:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-09-25 05:44:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-25 05:44:55,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:55,458 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:55,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 05:44:55,459 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:55,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:55,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 7 times [2020-09-25 05:44:55,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:55,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379167146] [2020-09-25 05:44:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:55,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:55,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:55,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:56,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:56,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:56,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:57,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:57,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:58,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:58,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:59,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:59,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:59,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:59,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:59,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:59,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:59,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 05:44:59,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-25 05:44:59,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4473 [2020-09-25 05:44:59,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:59,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:59,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 05:44:59,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:44:59,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-25 05:44:59,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:45:00,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:45:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:45:00,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:45:00,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:45:00,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:45:00,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:45:00,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:45:00,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:45:00,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:45:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:45:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:45:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:45:00,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:45:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:45:00,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379167146] [2020-09-25 05:45:00,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:45:00,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 05:45:00,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849137172] [2020-09-25 05:45:00,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 05:45:00,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:45:00,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 05:45:00,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:45:00,097 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 11 states. [2020-09-25 05:45:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:45:00,307 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-09-25 05:45:00,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 05:45:00,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-09-25 05:45:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:45:00,310 INFO L225 Difference]: With dead ends: 113 [2020-09-25 05:45:00,310 INFO L226 Difference]: Without dead ends: 97 [2020-09-25 05:45:00,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-09-25 05:45:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-25 05:45:00,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-09-25 05:45:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-25 05:45:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-09-25 05:45:00,319 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 78 [2020-09-25 05:45:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:45:00,321 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-09-25 05:45:00,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 05:45:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-09-25 05:45:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-25 05:45:00,323 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:45:00,323 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:45:00,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 05:45:00,324 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:45:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:45:00,324 INFO L82 PathProgramCache]: Analyzing trace with hash -48926695, now seen corresponding path program 7 times [2020-09-25 05:45:00,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:45:00,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617290128] [2020-09-25 05:45:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:45:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:45:00,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:45:00,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:45:00,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-25 05:45:00,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:45:00,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-09-25 05:45:00,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:45:00,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:45:00,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 05:45:00,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:45:00,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-25 05:45:00,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:45:01,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:45:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:45:01,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:45:01,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:45:01,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:45:01,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:45:01,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:45:01,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:45:01,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:45:01,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:45:01,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:45:01,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:45:01,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:45:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 27 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:45:01,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617290128] [2020-09-25 05:45:01,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:45:01,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 05:45:01,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218822939] [2020-09-25 05:45:01,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 05:45:01,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:45:01,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 05:45:01,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-25 05:45:01,230 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 18 states. [2020-09-25 05:45:01,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:45:01,528 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2020-09-25 05:45:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 05:45:01,528 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-09-25 05:45:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:45:01,529 INFO L225 Difference]: With dead ends: 87 [2020-09-25 05:45:01,529 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 05:45:01,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2020-09-25 05:45:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 05:45:01,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 05:45:01,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 05:45:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 05:45:01,531 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-09-25 05:45:01,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:45:01,531 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 05:45:01,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 05:45:01,531 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 05:45:01,532 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 05:45:01,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 05:45:01,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 05:45:01,741 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 05:45:01,741 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 05:45:01,741 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 05:45:01,742 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 05:45:01,742 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 05:45:01,742 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 05:45:01,742 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 05:45:01,742 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 05:45:01,742 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 05:45:01,742 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 05:45:01,742 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 05:45:01,743 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 22) no Hoare annotation was computed. [2020-09-25 05:45:01,743 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-25 05:45:01,743 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 05:45:01,743 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 22) no Hoare annotation was computed. [2020-09-25 05:45:01,743 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2020-09-25 05:45:01,743 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 05:45:01,743 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-25 05:45:01,744 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 05:45:01,744 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-25 05:45:01,744 INFO L268 CegarLoopResult]: For program point L16-3(line 16) no Hoare annotation was computed. [2020-09-25 05:45:01,744 INFO L268 CegarLoopResult]: For program point L16-5(lines 16 19) no Hoare annotation was computed. [2020-09-25 05:45:01,745 INFO L268 CegarLoopResult]: For program point L16-6(line 16) no Hoare annotation was computed. [2020-09-25 05:45:01,745 INFO L268 CegarLoopResult]: For program point L16-7(line 16) no Hoare annotation was computed. [2020-09-25 05:45:01,745 INFO L268 CegarLoopResult]: For program point L16-9(line 16) no Hoare annotation was computed. [2020-09-25 05:45:01,745 INFO L268 CegarLoopResult]: For program point L16-10(line 16) no Hoare annotation was computed. [2020-09-25 05:45:01,745 INFO L264 CegarLoopResult]: At program point L16-11(lines 16 19) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 2))) (or (and (< 0 (+ main_~y~0 1)) (<= (* 3 main_~y~0) .cse0) (<= 1 (+ main_~x~0 main_~y~0))) (and (<= (* 2 main_~y~0) .cse0) (<= 2 main_~y~0)))) [2020-09-25 05:45:01,746 INFO L264 CegarLoopResult]: At program point L16-12(lines 16 19) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2020-09-25 05:45:01,746 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 05:45:01,746 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 05:45:01,746 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 05:45:01,746 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 05:45:01,747 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 05:45:01,747 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 05:45:01,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 05:45:01 BoogieIcfgContainer [2020-09-25 05:45:01,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 05:45:01,789 INFO L168 Benchmark]: Toolchain (without parser) took 21692.92 ms. Allocated memory was 139.5 MB in the beginning and 367.0 MB in the end (delta: 227.5 MB). Free memory was 103.0 MB in the beginning and 306.7 MB in the end (delta: -203.7 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-09-25 05:45:01,791 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 05:45:01,792 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.98 ms. Allocated memory is still 139.5 MB. Free memory was 102.4 MB in the beginning and 92.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-25 05:45:01,796 INFO L168 Benchmark]: Boogie Preprocessor took 108.88 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 92.9 MB in the beginning and 179.4 MB in the end (delta: -86.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-25 05:45:01,797 INFO L168 Benchmark]: RCFGBuilder took 333.23 ms. Allocated memory is still 200.3 MB. Free memory was 178.8 MB in the beginning and 166.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-25 05:45:01,797 INFO L168 Benchmark]: TraceAbstraction took 20930.20 ms. Allocated memory was 200.3 MB in the beginning and 367.0 MB in the end (delta: 166.7 MB). Free memory was 165.5 MB in the beginning and 306.7 MB in the end (delta: -141.3 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-09-25 05:45:01,802 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.98 ms. Allocated memory is still 139.5 MB. Free memory was 102.4 MB in the beginning and 92.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.88 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 92.9 MB in the beginning and 179.4 MB in the end (delta: -86.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 333.23 ms. Allocated memory is still 200.3 MB. Free memory was 178.8 MB in the beginning and 166.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20930.20 ms. Allocated memory was 200.3 MB in the beginning and 367.0 MB in the end (delta: 166.7 MB). Free memory was 165.5 MB in the beginning and 306.7 MB in the end (delta: -141.3 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((0 < y + 1 && 3 * y <= x + 2) && 1 <= x + y) || (2 * y <= x + 2 && 2 <= y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.5s, OverallIterations: 17, TraceHistogramMax: 8, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 452 SDtfs, 786 SDslu, 2419 SDs, 0 SdLazy, 973 SolverSat, 141 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 272 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=16, 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, 17 MinimizatonAttempts, 102 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 23 PreInvPairs, 38 NumberOfFragments, 38 HoareAnnotationTreeSize, 23 FomulaSimplifications, 165 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 144 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 17.3s InterpolantComputationTime, 771 NumberOfCodeBlocks, 771 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 754 ConstructedInterpolants, 0 QuantifiedInterpolants, 161964 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 27/1232 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 correct! Received shutdown request...