/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:53:11,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:53:11,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:53:11,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:53:11,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:53:11,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:53:11,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:53:11,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:53:11,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:53:11,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:53:11,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:53:11,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:53:11,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:53:11,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:53:11,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:53:11,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:53:11,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:53:11,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:53:11,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:53:11,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:53:11,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:53:11,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:53:11,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:53:11,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:53:11,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:53:11,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:53:11,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:53:11,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:53:11,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:53:11,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:53:11,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:53:11,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:53:11,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:53:11,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:53:11,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:53:11,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:53:11,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:53:11,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:53:11,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:53:11,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:53:11,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:53:11,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:53:11,837 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:53:11,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:53:11,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:53:11,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:53:11,840 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:53:11,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:53:11,841 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:53:11,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:53:11,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:53:11,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:53:11,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:53:11,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:53:11,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:53:11,843 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:53:11,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:53:11,843 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:53:11,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:53:11,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:53:11,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:53:11,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:53:11,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:53:11,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:53:11,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:53:11,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:53:11,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:53:11,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:53:11,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:53:11,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:53:11,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:53:11,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:53:12,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:53:12,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:53:12,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:53:12,303 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:53:12,304 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:53:12,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-10-28 14:53:12,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ad18e6a4/ba57019c4aa6493dbdfe96f20904db42/FLAG5efd006b1 [2020-10-28 14:53:13,059 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:53:13,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-10-28 14:53:13,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ad18e6a4/ba57019c4aa6493dbdfe96f20904db42/FLAG5efd006b1 [2020-10-28 14:53:13,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ad18e6a4/ba57019c4aa6493dbdfe96f20904db42 [2020-10-28 14:53:13,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:53:13,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:53:13,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:13,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:53:13,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:53:13,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cb9370 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13, skipping insertion in model container [2020-10-28 14:53:13,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:53:13,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:53:13,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:13,638 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:53:13,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:13,676 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:53:13,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13 WrapperNode [2020-10-28 14:53:13,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:13,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:53:13,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:53:13,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:53:13,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... [2020-10-28 14:53:13,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:53:13,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:53:13,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:53:13,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:53:13,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:53:13,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:53:13,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:53:13,797 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:53:13,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:53:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:53:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:53:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:53:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:53:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:53:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:53:13,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:53:13,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:53:13,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:53:13,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:53:13,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:53:13,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:53:14,324 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:53:14,324 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:53:14,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:14 BoogieIcfgContainer [2020-10-28 14:53:14,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:53:14,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:53:14,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:53:14,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:53:14,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:53:13" (1/3) ... [2020-10-28 14:53:14,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fd8cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:14, skipping insertion in model container [2020-10-28 14:53:14,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:13" (2/3) ... [2020-10-28 14:53:14,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fd8cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:14, skipping insertion in model container [2020-10-28 14:53:14,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:14" (3/3) ... [2020-10-28 14:53:14,342 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-10-28 14:53:14,355 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:53:14,361 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:53:14,376 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:53:14,420 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:53:14,420 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:53:14,421 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:53:14,421 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:53:14,421 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:53:14,421 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:53:14,421 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:53:14,421 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:53:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-28 14:53:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:53:14,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:14,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:14,456 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:14,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2118099465, now seen corresponding path program 1 times [2020-10-28 14:53:14,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:14,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303498242] [2020-10-28 14:53:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:14,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:14,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:53:14,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:14,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-28 14:53:14,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:14,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:14,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:14,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:14,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:14,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:53:15,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:15,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:15,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:53:15,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:15,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:15,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:15,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:15,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303498242] [2020-10-28 14:53:15,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:15,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:15,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138794383] [2020-10-28 14:53:15,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:15,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:15,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:15,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:15,151 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-28 14:53:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:15,357 INFO L93 Difference]: Finished difference Result 68 states and 109 transitions. [2020-10-28 14:53:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:15,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 14:53:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:15,370 INFO L225 Difference]: With dead ends: 68 [2020-10-28 14:53:15,370 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:53:15,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:15,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:53:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-28 14:53:15,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:53:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 59 transitions. [2020-10-28 14:53:15,419 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 59 transitions. Word has length 18 [2020-10-28 14:53:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:15,419 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 59 transitions. [2020-10-28 14:53:15,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 59 transitions. [2020-10-28 14:53:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:53:15,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:15,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:15,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:53:15,421 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:15,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1783840821, now seen corresponding path program 1 times [2020-10-28 14:53:15,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:15,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774469724] [2020-10-28 14:53:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:53:15,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:15,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 14:53:15,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:15,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:15,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:15,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:15,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:15,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:15,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:53:15,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:15,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:15,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:15,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:15,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774469724] [2020-10-28 14:53:15,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:15,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:15,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918687982] [2020-10-28 14:53:15,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:15,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:15,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:15,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:15,586 INFO L87 Difference]: Start difference. First operand 36 states and 59 transitions. Second operand 4 states. [2020-10-28 14:53:15,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:15,721 INFO L93 Difference]: Finished difference Result 79 states and 135 transitions. [2020-10-28 14:53:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:15,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 14:53:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:15,723 INFO L225 Difference]: With dead ends: 79 [2020-10-28 14:53:15,723 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:53:15,724 INFO L677 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 [2020-10-28 14:53:15,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:53:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-28 14:53:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:53:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 79 transitions. [2020-10-28 14:53:15,735 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 79 transitions. Word has length 18 [2020-10-28 14:53:15,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:15,736 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 79 transitions. [2020-10-28 14:53:15,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:15,736 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 79 transitions. [2020-10-28 14:53:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:53:15,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:15,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:15,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:53:15,738 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:15,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1229925405, now seen corresponding path program 1 times [2020-10-28 14:53:15,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:15,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680719088] [2020-10-28 14:53:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:53:15,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:15,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-28 14:53:15,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:15,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:53:15,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:15,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:16,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:16,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:16,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:16,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:16,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:16,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:16,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680719088] [2020-10-28 14:53:16,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:16,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:16,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912897887] [2020-10-28 14:53:16,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:16,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:16,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:16,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:16,022 INFO L87 Difference]: Start difference. First operand 48 states and 79 transitions. Second operand 4 states. [2020-10-28 14:53:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:16,148 INFO L93 Difference]: Finished difference Result 128 states and 220 transitions. [2020-10-28 14:53:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:16,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 14:53:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:16,151 INFO L225 Difference]: With dead ends: 128 [2020-10-28 14:53:16,151 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 14:53:16,152 INFO L677 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 [2020-10-28 14:53:16,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 14:53:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-28 14:53:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 14:53:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 142 transitions. [2020-10-28 14:53:16,165 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 142 transitions. Word has length 19 [2020-10-28 14:53:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:16,166 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 142 transitions. [2020-10-28 14:53:16,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:16,166 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 142 transitions. [2020-10-28 14:53:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:53:16,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:16,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:16,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:53:16,168 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:16,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:16,168 INFO L82 PathProgramCache]: Analyzing trace with hash -836898395, now seen corresponding path program 1 times [2020-10-28 14:53:16,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:16,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523522916] [2020-10-28 14:53:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:53:16,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:16,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-28 14:53:16,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:16,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:53:16,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:16,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:16,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:16,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:16,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:16,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:16,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523522916] [2020-10-28 14:53:16,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:16,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:16,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140613597] [2020-10-28 14:53:16,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:16,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:16,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:16,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:16,371 INFO L87 Difference]: Start difference. First operand 85 states and 142 transitions. Second operand 4 states. [2020-10-28 14:53:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:16,484 INFO L93 Difference]: Finished difference Result 109 states and 181 transitions. [2020-10-28 14:53:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:16,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 14:53:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:16,486 INFO L225 Difference]: With dead ends: 109 [2020-10-28 14:53:16,486 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 14:53:16,486 INFO L677 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 [2020-10-28 14:53:16,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 14:53:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2020-10-28 14:53:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 14:53:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 140 transitions. [2020-10-28 14:53:16,498 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 140 transitions. Word has length 19 [2020-10-28 14:53:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:16,498 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 140 transitions. [2020-10-28 14:53:16,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 140 transitions. [2020-10-28 14:53:16,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:53:16,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:16,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:16,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:53:16,500 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:16,501 INFO L82 PathProgramCache]: Analyzing trace with hash 533677250, now seen corresponding path program 1 times [2020-10-28 14:53:16,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:16,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882377429] [2020-10-28 14:53:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:53:16,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:16,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-28 14:53:16,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:53:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:16,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:16,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:16,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:16,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:16,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:16,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:16,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882377429] [2020-10-28 14:53:16,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:16,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:16,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316087841] [2020-10-28 14:53:16,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:16,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:16,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:16,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:16,652 INFO L87 Difference]: Start difference. First operand 85 states and 140 transitions. Second operand 4 states. [2020-10-28 14:53:16,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:16,759 INFO L93 Difference]: Finished difference Result 153 states and 255 transitions. [2020-10-28 14:53:16,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:16,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-28 14:53:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:16,761 INFO L225 Difference]: With dead ends: 153 [2020-10-28 14:53:16,761 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 14:53:16,761 INFO L677 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 [2020-10-28 14:53:16,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 14:53:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 117. [2020-10-28 14:53:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 14:53:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 192 transitions. [2020-10-28 14:53:16,774 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 192 transitions. Word has length 20 [2020-10-28 14:53:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:16,775 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 192 transitions. [2020-10-28 14:53:16,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 192 transitions. [2020-10-28 14:53:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:53:16,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:16,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:16,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:53:16,777 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:16,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:16,777 INFO L82 PathProgramCache]: Analyzing trace with hash 140650240, now seen corresponding path program 1 times [2020-10-28 14:53:16,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:16,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395764304] [2020-10-28 14:53:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:53:16,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:16,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-28 14:53:16,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:53:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:16,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:16,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:16,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:16,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:16,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395764304] [2020-10-28 14:53:16,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:16,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:16,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722620809] [2020-10-28 14:53:16,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:16,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:16,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:16,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:16,906 INFO L87 Difference]: Start difference. First operand 117 states and 192 transitions. Second operand 4 states. [2020-10-28 14:53:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:17,018 INFO L93 Difference]: Finished difference Result 269 states and 447 transitions. [2020-10-28 14:53:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:17,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-28 14:53:17,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:17,020 INFO L225 Difference]: With dead ends: 269 [2020-10-28 14:53:17,020 INFO L226 Difference]: Without dead ends: 158 [2020-10-28 14:53:17,021 INFO L677 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 [2020-10-28 14:53:17,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-28 14:53:17,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-28 14:53:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 14:53:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 252 transitions. [2020-10-28 14:53:17,036 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 252 transitions. Word has length 20 [2020-10-28 14:53:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:17,036 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 252 transitions. [2020-10-28 14:53:17,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 252 transitions. [2020-10-28 14:53:17,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:53:17,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:17,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:17,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:53:17,038 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:17,039 INFO L82 PathProgramCache]: Analyzing trace with hash -629204722, now seen corresponding path program 1 times [2020-10-28 14:53:17,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:17,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213932394] [2020-10-28 14:53:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:53:17,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:17,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-28 14:53:17,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:17,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:17,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:17,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:17,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:17,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:17,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:17,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:17,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:17,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:17,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213932394] [2020-10-28 14:53:17,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:17,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:17,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334559389] [2020-10-28 14:53:17,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:17,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:17,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:17,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:17,288 INFO L87 Difference]: Start difference. First operand 157 states and 252 transitions. Second operand 4 states. [2020-10-28 14:53:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:17,410 INFO L93 Difference]: Finished difference Result 277 states and 447 transitions. [2020-10-28 14:53:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:17,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 14:53:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:17,413 INFO L225 Difference]: With dead ends: 277 [2020-10-28 14:53:17,413 INFO L226 Difference]: Without dead ends: 274 [2020-10-28 14:53:17,413 INFO L677 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 [2020-10-28 14:53:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-28 14:53:17,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 225. [2020-10-28 14:53:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-28 14:53:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 356 transitions. [2020-10-28 14:53:17,427 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 356 transitions. Word has length 21 [2020-10-28 14:53:17,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:17,428 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 356 transitions. [2020-10-28 14:53:17,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 356 transitions. [2020-10-28 14:53:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:53:17,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:17,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:17,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:53:17,431 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:17,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:17,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1022231732, now seen corresponding path program 1 times [2020-10-28 14:53:17,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:17,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50327795] [2020-10-28 14:53:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:53:17,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:17,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-28 14:53:17,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:17,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:53:17,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:17,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:17,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:17,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:17,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:17,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:17,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:17,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-28 14:53:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:17,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50327795] [2020-10-28 14:53:17,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:17,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:17,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142753549] [2020-10-28 14:53:17,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:17,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:17,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:17,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:17,653 INFO L87 Difference]: Start difference. First operand 225 states and 356 transitions. Second operand 4 states. [2020-10-28 14:53:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:17,770 INFO L93 Difference]: Finished difference Result 342 states and 539 transitions. [2020-10-28 14:53:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:17,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 14:53:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:17,773 INFO L225 Difference]: With dead ends: 342 [2020-10-28 14:53:17,773 INFO L226 Difference]: Without dead ends: 235 [2020-10-28 14:53:17,774 INFO L677 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 [2020-10-28 14:53:17,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-28 14:53:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2020-10-28 14:53:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-28 14:53:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 360 transitions. [2020-10-28 14:53:17,785 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 360 transitions. Word has length 21 [2020-10-28 14:53:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:17,785 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 360 transitions. [2020-10-28 14:53:17,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:17,786 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 360 transitions. [2020-10-28 14:53:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:53:17,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:17,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:17,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:53:17,788 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:17,788 INFO L82 PathProgramCache]: Analyzing trace with hash -321167154, now seen corresponding path program 1 times [2020-10-28 14:53:17,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:17,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725572031] [2020-10-28 14:53:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:53:17,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:17,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 14:53:17,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:17,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:17,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:17,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:17,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:17,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:17,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:17,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:17,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:17,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:17,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725572031] [2020-10-28 14:53:17,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:17,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:17,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891807598] [2020-10-28 14:53:17,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:17,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:17,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:17,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:17,913 INFO L87 Difference]: Start difference. First operand 234 states and 360 transitions. Second operand 4 states. [2020-10-28 14:53:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:18,051 INFO L93 Difference]: Finished difference Result 526 states and 811 transitions. [2020-10-28 14:53:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:18,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 14:53:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:18,053 INFO L225 Difference]: With dead ends: 526 [2020-10-28 14:53:18,053 INFO L226 Difference]: Without dead ends: 307 [2020-10-28 14:53:18,056 INFO L677 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 [2020-10-28 14:53:18,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-28 14:53:18,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2020-10-28 14:53:18,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-28 14:53:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 456 transitions. [2020-10-28 14:53:18,072 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 456 transitions. Word has length 21 [2020-10-28 14:53:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:18,072 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 456 transitions. [2020-10-28 14:53:18,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:18,073 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 456 transitions. [2020-10-28 14:53:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:53:18,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:18,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:18,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:53:18,076 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:18,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2060631477, now seen corresponding path program 1 times [2020-10-28 14:53:18,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:18,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505158380] [2020-10-28 14:53:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:53:18,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:18,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-28 14:53:18,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:18,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:18,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:18,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:18,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:18,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:18,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:18,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:18,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:18,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:18,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505158380] [2020-10-28 14:53:18,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:18,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:18,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316141121] [2020-10-28 14:53:18,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:18,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:18,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:18,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:18,304 INFO L87 Difference]: Start difference. First operand 306 states and 456 transitions. Second operand 4 states. [2020-10-28 14:53:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:18,429 INFO L93 Difference]: Finished difference Result 518 states and 771 transitions. [2020-10-28 14:53:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:18,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 14:53:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:18,433 INFO L225 Difference]: With dead ends: 518 [2020-10-28 14:53:18,433 INFO L226 Difference]: Without dead ends: 515 [2020-10-28 14:53:18,434 INFO L677 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 [2020-10-28 14:53:18,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-28 14:53:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 450. [2020-10-28 14:53:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-28 14:53:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 656 transitions. [2020-10-28 14:53:18,454 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 656 transitions. Word has length 22 [2020-10-28 14:53:18,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:18,455 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 656 transitions. [2020-10-28 14:53:18,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 656 transitions. [2020-10-28 14:53:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:53:18,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:18,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:18,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:53:18,457 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:18,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:18,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1841308809, now seen corresponding path program 1 times [2020-10-28 14:53:18,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:18,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752963993] [2020-10-28 14:53:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:53:18,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:18,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-28 14:53:18,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:18,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:18,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:18,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:18,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:18,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:18,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:18,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:18,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:18,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:18,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752963993] [2020-10-28 14:53:18,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:18,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:18,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894867382] [2020-10-28 14:53:18,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:18,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:18,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:18,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:18,665 INFO L87 Difference]: Start difference. First operand 450 states and 656 transitions. Second operand 4 states. [2020-10-28 14:53:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:18,809 INFO L93 Difference]: Finished difference Result 1014 states and 1475 transitions. [2020-10-28 14:53:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:18,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 14:53:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:18,813 INFO L225 Difference]: With dead ends: 1014 [2020-10-28 14:53:18,813 INFO L226 Difference]: Without dead ends: 579 [2020-10-28 14:53:18,814 INFO L677 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 [2020-10-28 14:53:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2020-10-28 14:53:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 578. [2020-10-28 14:53:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-28 14:53:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 808 transitions. [2020-10-28 14:53:18,840 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 808 transitions. Word has length 22 [2020-10-28 14:53:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:18,840 INFO L481 AbstractCegarLoop]: Abstraction has 578 states and 808 transitions. [2020-10-28 14:53:18,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 808 transitions. [2020-10-28 14:53:18,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:53:18,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:18,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:18,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:53:18,842 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash 551624507, now seen corresponding path program 1 times [2020-10-28 14:53:18,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:18,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412516719] [2020-10-28 14:53:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:53:19,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:19,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-28 14:53:19,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:19,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:53:19,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:19,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:19,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:19,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:19,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:19,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:19,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:19,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:19,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:19,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:19,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412516719] [2020-10-28 14:53:19,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:19,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:19,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411325234] [2020-10-28 14:53:19,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:19,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:19,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:19,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:19,173 INFO L87 Difference]: Start difference. First operand 578 states and 808 transitions. Second operand 4 states. [2020-10-28 14:53:19,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:19,306 INFO L93 Difference]: Finished difference Result 949 states and 1306 transitions. [2020-10-28 14:53:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:19,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 14:53:19,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:19,312 INFO L225 Difference]: With dead ends: 949 [2020-10-28 14:53:19,312 INFO L226 Difference]: Without dead ends: 946 [2020-10-28 14:53:19,313 INFO L677 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 [2020-10-28 14:53:19,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2020-10-28 14:53:19,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 882. [2020-10-28 14:53:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 882 states. [2020-10-28 14:53:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1208 transitions. [2020-10-28 14:53:19,365 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1208 transitions. Word has length 23 [2020-10-28 14:53:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:19,365 INFO L481 AbstractCegarLoop]: Abstraction has 882 states and 1208 transitions. [2020-10-28 14:53:19,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1208 transitions. [2020-10-28 14:53:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:53:19,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:19,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:19,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:53:19,368 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:19,369 INFO L82 PathProgramCache]: Analyzing trace with hash 158597497, now seen corresponding path program 1 times [2020-10-28 14:53:19,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:19,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743551840] [2020-10-28 14:53:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:19,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:53:19,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:19,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-28 14:53:19,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:19,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:19,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:19,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:19,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:19,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:19,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:19,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:19,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:19,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:19,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:19,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:19,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743551840] [2020-10-28 14:53:19,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:19,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:19,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593826367] [2020-10-28 14:53:19,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:19,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:19,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:19,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:19,654 INFO L87 Difference]: Start difference. First operand 882 states and 1208 transitions. Second operand 4 states. [2020-10-28 14:53:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:19,780 INFO L93 Difference]: Finished difference Result 1302 states and 1763 transitions. [2020-10-28 14:53:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:19,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 14:53:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:19,787 INFO L225 Difference]: With dead ends: 1302 [2020-10-28 14:53:19,787 INFO L226 Difference]: Without dead ends: 883 [2020-10-28 14:53:19,789 INFO L677 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 [2020-10-28 14:53:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2020-10-28 14:53:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 882. [2020-10-28 14:53:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 882 states. [2020-10-28 14:53:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1160 transitions. [2020-10-28 14:53:19,835 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1160 transitions. Word has length 23 [2020-10-28 14:53:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:19,835 INFO L481 AbstractCegarLoop]: Abstraction has 882 states and 1160 transitions. [2020-10-28 14:53:19,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1160 transitions. [2020-10-28 14:53:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:53:19,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:19,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:19,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:53:19,838 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:19,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1121266181, now seen corresponding path program 1 times [2020-10-28 14:53:19,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:19,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322962884] [2020-10-28 14:53:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:19,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:53:19,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:19,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-28 14:53:19,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:19,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:20,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:20,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:20,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:20,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:20,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:20,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:20,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:20,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322962884] [2020-10-28 14:53:20,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:20,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:20,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103219477] [2020-10-28 14:53:20,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:20,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:20,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:20,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:20,026 INFO L87 Difference]: Start difference. First operand 882 states and 1160 transitions. Second operand 4 states. [2020-10-28 14:53:20,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:20,153 INFO L93 Difference]: Finished difference Result 1310 states and 1707 transitions. [2020-10-28 14:53:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:20,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 14:53:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:20,159 INFO L225 Difference]: With dead ends: 1310 [2020-10-28 14:53:20,159 INFO L226 Difference]: Without dead ends: 891 [2020-10-28 14:53:20,160 INFO L677 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 [2020-10-28 14:53:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-10-28 14:53:20,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 890. [2020-10-28 14:53:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2020-10-28 14:53:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1128 transitions. [2020-10-28 14:53:20,195 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1128 transitions. Word has length 23 [2020-10-28 14:53:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:20,196 INFO L481 AbstractCegarLoop]: Abstraction has 890 states and 1128 transitions. [2020-10-28 14:53:20,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1128 transitions. [2020-10-28 14:53:20,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:53:20,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:20,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:20,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:53:20,198 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:20,199 INFO L82 PathProgramCache]: Analyzing trace with hash -863100743, now seen corresponding path program 1 times [2020-10-28 14:53:20,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:20,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385344944] [2020-10-28 14:53:20,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:53:20,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:20,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 14:53:20,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:20,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:20,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:20,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:20,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:20,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:20,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:20,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:20,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:20,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:20,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:20,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385344944] [2020-10-28 14:53:20,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:20,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:20,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960545124] [2020-10-28 14:53:20,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:20,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:20,322 INFO L87 Difference]: Start difference. First operand 890 states and 1128 transitions. Second operand 4 states. [2020-10-28 14:53:20,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:20,464 INFO L93 Difference]: Finished difference Result 1326 states and 1667 transitions. [2020-10-28 14:53:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:20,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 14:53:20,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:20,469 INFO L225 Difference]: With dead ends: 1326 [2020-10-28 14:53:20,469 INFO L226 Difference]: Without dead ends: 907 [2020-10-28 14:53:20,471 INFO L677 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 [2020-10-28 14:53:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2020-10-28 14:53:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 906. [2020-10-28 14:53:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 906 states. [2020-10-28 14:53:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1112 transitions. [2020-10-28 14:53:20,507 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1112 transitions. Word has length 23 [2020-10-28 14:53:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:20,508 INFO L481 AbstractCegarLoop]: Abstraction has 906 states and 1112 transitions. [2020-10-28 14:53:20,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1112 transitions. [2020-10-28 14:53:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:53:20,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:20,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:20,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:53:20,510 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:20,511 INFO L82 PathProgramCache]: Analyzing trace with hash -162036165, now seen corresponding path program 1 times [2020-10-28 14:53:20,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:20,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356826560] [2020-10-28 14:53:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:53:20,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:20,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 14:53:20,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:20,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:53:20,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:53:20,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:20,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:20,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:20,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:20,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:20,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:20,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:20,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:20,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356826560] [2020-10-28 14:53:20,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:20,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:20,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692450784] [2020-10-28 14:53:20,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:20,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:20,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:20,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:20,612 INFO L87 Difference]: Start difference. First operand 906 states and 1112 transitions. Second operand 4 states. [2020-10-28 14:53:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:20,748 INFO L93 Difference]: Finished difference Result 1994 states and 2392 transitions. [2020-10-28 14:53:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:20,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 14:53:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:20,749 INFO L225 Difference]: With dead ends: 1994 [2020-10-28 14:53:20,749 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 14:53:20,752 INFO L677 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 [2020-10-28 14:53:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 14:53:20,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 14:53:20,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 14:53:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 14:53:20,753 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-10-28 14:53:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:20,753 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 14:53:20,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 14:53:20,754 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 14:53:20,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:53:20,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 14:53:21,414 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 34 [2020-10-28 14:53:21,472 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-28 14:53:21,472 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-28 14:53:21,472 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-28 14:53:21,472 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-28 14:53:21,473 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:53:21,473 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-28 14:53:21,473 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:53:21,473 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:53:21,473 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 14:53:21,473 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 14:53:21,473 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:53:21,474 INFO L274 CegarLoopResult]: For program point L60-1(lines 29 104) no Hoare annotation was computed. [2020-10-28 14:53:21,474 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 109) no Hoare annotation was computed. [2020-10-28 14:53:21,474 INFO L274 CegarLoopResult]: For program point L85(line 85) no Hoare annotation was computed. [2020-10-28 14:53:21,474 INFO L274 CegarLoopResult]: For program point L52-1(lines 29 104) no Hoare annotation was computed. [2020-10-28 14:53:21,475 INFO L274 CegarLoopResult]: For program point L94-1(lines 29 104) no Hoare annotation was computed. [2020-10-28 14:53:21,475 INFO L274 CegarLoopResult]: For program point L95(line 95) no Hoare annotation was computed. [2020-10-28 14:53:21,475 INFO L274 CegarLoopResult]: For program point L79-1(lines 29 104) no Hoare annotation was computed. [2020-10-28 14:53:21,475 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 109) no Hoare annotation was computed. [2020-10-28 14:53:21,476 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 109) the Hoare annotation is: true [2020-10-28 14:53:21,476 INFO L274 CegarLoopResult]: For program point L80(line 80) no Hoare annotation was computed. [2020-10-28 14:53:21,476 INFO L277 CegarLoopResult]: At program point L105(lines 7 109) the Hoare annotation is: true [2020-10-28 14:53:21,476 INFO L274 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-10-28 14:53:21,476 INFO L274 CegarLoopResult]: For program point L64-1(lines 29 104) no Hoare annotation was computed. [2020-10-28 14:53:21,476 INFO L274 CegarLoopResult]: For program point L89-1(lines 29 104) no Hoare annotation was computed. [2020-10-28 14:53:21,476 INFO L274 CegarLoopResult]: For program point L56-1(lines 29 104) no Hoare annotation was computed. [2020-10-28 14:53:21,477 INFO L274 CegarLoopResult]: For program point L48(lines 48 50) no Hoare annotation was computed. [2020-10-28 14:53:21,477 INFO L274 CegarLoopResult]: For program point L48-2(lines 29 104) no Hoare annotation was computed. [2020-10-28 14:53:21,477 INFO L274 CegarLoopResult]: For program point L90(line 90) no Hoare annotation was computed. [2020-10-28 14:53:21,478 INFO L274 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-10-28 14:53:21,478 INFO L274 CegarLoopResult]: For program point L74-1(lines 29 104) no Hoare annotation was computed. [2020-10-28 14:53:21,478 INFO L277 CegarLoopResult]: At program point L99-1(lines 29 104) the Hoare annotation is: true [2020-10-28 14:53:21,478 INFO L274 CegarLoopResult]: For program point L75(line 75) no Hoare annotation was computed. [2020-10-28 14:53:21,478 INFO L274 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-10-28 14:53:21,478 INFO L270 CegarLoopResult]: At program point L100-1(lines 7 109) the Hoare annotation is: false [2020-10-28 14:53:21,478 INFO L274 CegarLoopResult]: For program point L84-1(lines 29 104) no Hoare annotation was computed. [2020-10-28 14:53:21,478 INFO L274 CegarLoopResult]: For program point L68-1(lines 29 104) no Hoare annotation was computed. [2020-10-28 14:53:21,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:53:21 BoogieIcfgContainer [2020-10-28 14:53:21,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:53:21,493 INFO L168 Benchmark]: Toolchain (without parser) took 8074.45 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.4 MB in the beginning and 119.6 MB in the end (delta: 6.8 MB). Peak memory consumption was 119.8 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:21,493 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 84.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:53:21,500 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.59 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:21,505 INFO L168 Benchmark]: Boogie Preprocessor took 36.90 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:21,505 INFO L168 Benchmark]: RCFGBuilder took 611.38 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 97.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:21,506 INFO L168 Benchmark]: TraceAbstraction took 7159.16 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 96.8 MB in the beginning and 119.6 MB in the end (delta: -22.8 MB). Peak memory consumption was 90.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:21,513 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 84.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.59 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.90 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 611.38 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 97.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7159.16 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 96.8 MB in the beginning and 119.6 MB in the end (delta: -22.8 MB). Peak memory consumption was 90.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 29]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.3s, OverallIterations: 16, TraceHistogramMax: 1, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 883 SDtfs, 1196 SDslu, 125 SDs, 0 SdLazy, 639 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=906occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 254 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 90 NumberOfFragments, 38 HoareAnnotationTreeSize, 23 FomulaSimplifications, 208722 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 336 NumberOfCodeBlocks, 336 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 320 ConstructedInterpolants, 0 QuantifiedInterpolants, 20640 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 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...