/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=DEEPEST --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/reducercommutativity/sum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 22:45:29,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 22:45:29,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 22:45:29,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 22:45:29,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 22:45:29,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 22:45:29,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 22:45:29,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 22:45:29,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 22:45:29,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 22:45:29,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 22:45:29,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 22:45:29,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 22:45:29,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 22:45:29,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 22:45:29,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 22:45:29,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 22:45:29,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 22:45:29,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 22:45:29,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 22:45:29,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 22:45:29,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 22:45:29,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 22:45:29,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 22:45:29,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 22:45:30,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 22:45:30,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 22:45:30,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 22:45:30,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 22:45:30,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 22:45:30,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 22:45:30,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 22:45:30,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 22:45:30,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 22:45:30,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 22:45:30,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 22:45:30,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 22:45:30,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 22:45:30,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 22:45:30,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 22:45:30,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 22:45:30,028 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 [2020-10-27 22:45:30,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 22:45:30,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 22:45:30,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 22:45:30,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 22:45:30,088 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 22:45:30,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 22:45:30,088 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 22:45:30,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 22:45:30,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 22:45:30,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 22:45:30,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 22:45:30,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 22:45:30,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 22:45:30,091 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 22:45:30,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 22:45:30,091 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 22:45:30,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 22:45:30,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 22:45:30,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 22:45:30,092 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 22:45:30,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 22:45:30,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 22:45:30,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 22:45:30,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 22:45:30,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 22:45:30,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 22:45:30,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 22:45:30,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 22:45:30,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 22:45:30,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 22:45:30,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 22:45:30,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 22:45:30,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 22:45:30,570 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 22:45:30,571 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 22:45:30,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum.i [2020-10-27 22:45:30,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ee9e92dc/6644ded7819d44218c18163ffe0c4438/FLAG26246bb8a [2020-10-27 22:45:31,281 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 22:45:31,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/reducercommutativity/sum.i [2020-10-27 22:45:31,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ee9e92dc/6644ded7819d44218c18163ffe0c4438/FLAG26246bb8a [2020-10-27 22:45:31,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ee9e92dc/6644ded7819d44218c18163ffe0c4438 [2020-10-27 22:45:31,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 22:45:31,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 22:45:31,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 22:45:31,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 22:45:31,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 22:45:31,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:45:31" (1/1) ... [2020-10-27 22:45:31,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c828bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:45:31, skipping insertion in model container [2020-10-27 22:45:31,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:45:31" (1/1) ... [2020-10-27 22:45:31,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 22:45:31,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 22:45:32,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:45:32,017 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 22:45:32,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:45:32,085 INFO L208 MainTranslator]: Completed translation [2020-10-27 22:45:32,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:45:32 WrapperNode [2020-10-27 22:45:32,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 22:45:32,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 22:45:32,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 22:45:32,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 22:45:32,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:45:32" (1/1) ... [2020-10-27 22:45:32,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:45:32" (1/1) ... [2020-10-27 22:45:32,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:45:32" (1/1) ... [2020-10-27 22:45:32,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:45:32" (1/1) ... [2020-10-27 22:45:32,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:45:32" (1/1) ... [2020-10-27 22:45:32,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:45:32" (1/1) ... [2020-10-27 22:45:32,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:45:32" (1/1) ... [2020-10-27 22:45:32,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 22:45:32,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 22:45:32,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 22:45:32,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 22:45:32,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:45:32" (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 [2020-10-27 22:45:32,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 22:45:32,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 22:45:32,263 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 22:45:32,263 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-27 22:45:32,263 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 22:45:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 22:45:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 22:45:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 22:45:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 22:45:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 22:45:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 22:45:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 22:45:32,266 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-27 22:45:32,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 22:45:32,266 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 22:45:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 22:45:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 22:45:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 22:45:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 22:45:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 22:45:32,795 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 22:45:32,796 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 22:45:32,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:45:32 BoogieIcfgContainer [2020-10-27 22:45:32,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 22:45:32,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 22:45:32,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 22:45:32,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 22:45:32,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 10:45:31" (1/3) ... [2020-10-27 22:45:32,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444430ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:45:32, skipping insertion in model container [2020-10-27 22:45:32,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:45:32" (2/3) ... [2020-10-27 22:45:32,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444430ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:45:32, skipping insertion in model container [2020-10-27 22:45:32,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:45:32" (3/3) ... [2020-10-27 22:45:32,820 INFO L111 eAbstractionObserver]: Analyzing ICFG sum.i [2020-10-27 22:45:32,833 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 22:45:32,838 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 22:45:32,852 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 22:45:32,897 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 22:45:32,897 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 22:45:32,897 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 22:45:32,897 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 22:45:32,898 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 22:45:32,898 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 22:45:32,898 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 22:45:32,898 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 22:45:32,924 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-27 22:45:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 22:45:32,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:45:32,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:45:32,935 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:45:32,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:45:32,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1722685754, now seen corresponding path program 1 times [2020-10-27 22:45:32,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:45:32,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574593105] [2020-10-27 22:45:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:45:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:33,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:33,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:33,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:33,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:33,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:35,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:35,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 22:45:35,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:45:35,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2023 [2020-10-27 22:45:35,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 22:45:35,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:35,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 22:45:35,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:45:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:35,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:35,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:35,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:45:35,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:35,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:45:35,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:35,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:35,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:35,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:35,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:35,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:45:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:35,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:35,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:35,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:35,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:45:35,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:45:35,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:45:35,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:35,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:35,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 22:45:35,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:35,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:35,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 22:45:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:35,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:35,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:35,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:35,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:45:35,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:45:35,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:45:35,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:35,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:35,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 22:45:35,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:35,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:35,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 22:45:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:35,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:35,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:35,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:45:35,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:35,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:45:35,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:35,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:35,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 22:45:35,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:35,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 22:45:35,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574593105] [2020-10-27 22:45:35,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:45:35,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 22:45:35,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856872888] [2020-10-27 22:45:35,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 22:45:35,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:45:35,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 22:45:35,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 22:45:35,336 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-27 22:45:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:45:35,440 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2020-10-27 22:45:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 22:45:35,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-27 22:45:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:45:35,450 INFO L225 Difference]: With dead ends: 60 [2020-10-27 22:45:35,450 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 22:45:35,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 22:45:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 22:45:35,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 22:45:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 22:45:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-27 22:45:35,499 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 34 [2020-10-27 22:45:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:45:35,499 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-27 22:45:35,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 22:45:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-27 22:45:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 22:45:35,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:45:35,502 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:45:35,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 22:45:35,503 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:45:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:45:35,504 INFO L82 PathProgramCache]: Analyzing trace with hash 948331636, now seen corresponding path program 1 times [2020-10-27 22:45:35,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:45:35,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655203533] [2020-10-27 22:45:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:45:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:35,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:35,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:35,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:35,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:35,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:37,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:37,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 22:45:37,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:45:37,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1654 [2020-10-27 22:45:37,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:37,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 22:45:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 22:45:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 22:45:37,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:37,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:45:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:37,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:37,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:37,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:45:37,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:37,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:45:37,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:37,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:37,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:37,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:37,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:37,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:45:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:37,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:37,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:37,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:45:37,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:37,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 22:45:37,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:37,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:45:37,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:37,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:45:37,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:37,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 22:45:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:37,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:37,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:37,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:45:37,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:37,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 22:45:37,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:37,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:45:37,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:37,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 22:45:37,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:37,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 22:45:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:37,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:37,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:37,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:45:37,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:37,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 22:45:37,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:37,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:45:37,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:37,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 22:45:37,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 22:45:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 22:45:37,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655203533] [2020-10-27 22:45:37,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:45:37,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 22:45:37,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015987265] [2020-10-27 22:45:37,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 22:45:37,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:45:37,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 22:45:37,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:45:37,767 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 11 states. [2020-10-27 22:45:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:45:38,237 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2020-10-27 22:45:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 22:45:38,237 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 22:45:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:45:38,241 INFO L225 Difference]: With dead ends: 55 [2020-10-27 22:45:38,241 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 22:45:38,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 22:45:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 22:45:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-27 22:45:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 22:45:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-10-27 22:45:38,259 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 34 [2020-10-27 22:45:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:45:38,260 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-10-27 22:45:38,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 22:45:38,260 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-10-27 22:45:38,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 22:45:38,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:45:38,262 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:45:38,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 22:45:38,262 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:45:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:45:38,263 INFO L82 PathProgramCache]: Analyzing trace with hash -803263022, now seen corresponding path program 1 times [2020-10-27 22:45:38,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:45:38,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609616745] [2020-10-27 22:45:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:45:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:38,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:38,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:38,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:38,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:38,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:38,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:40,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:40,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 22:45:40,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 22:45:40,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2041 [2020-10-27 22:45:40,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:45:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 22:45:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 22:45:40,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 22:45:40,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:45:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:40,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:40,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:40,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:45:40,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:40,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:45:40,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:40,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:40,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:40,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:40,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:40,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:45:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:40,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:40,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:40,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 22:45:40,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:40,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 22:45:40,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:40,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:45:40,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:40,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 22:45:40,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:45:40,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-27 22:45:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:40,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:40,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:40,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:40,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:45:40,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:45:40,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 22:45:40,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:45:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:45:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:45:40,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:40,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-27 22:45:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:40,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:40,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:40,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:45:40,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:40,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 22:45:40,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:40,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:45:40,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:45:40,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:45:40,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 22:45:40,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609616745] [2020-10-27 22:45:40,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:45:40,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 22:45:40,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797979070] [2020-10-27 22:45:40,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 22:45:40,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:45:40,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 22:45:40,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 22:45:40,502 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 7 states. [2020-10-27 22:45:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:45:40,787 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-10-27 22:45:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 22:45:40,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-27 22:45:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:45:40,789 INFO L225 Difference]: With dead ends: 57 [2020-10-27 22:45:40,789 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 22:45:40,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:45:40,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 22:45:40,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-27 22:45:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 22:45:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-27 22:45:40,798 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 36 [2020-10-27 22:45:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:45:40,798 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-27 22:45:40,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 22:45:40,799 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-27 22:45:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 22:45:40,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:45:40,800 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:45:40,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 22:45:40,801 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:45:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:45:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash -990947182, now seen corresponding path program 2 times [2020-10-27 22:45:40,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:45:40,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271709220] [2020-10-27 22:45:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:45:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:40,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:40,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:40,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:40,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:43,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:43,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 22:45:43,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 22:45:43,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3048 [2020-10-27 22:45:43,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:43,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:45:43,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 22:45:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:45:43,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 22:45:43,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:45:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:43,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:43,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:43,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:45:43,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:43,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:45:43,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:43,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:43,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:45:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:43,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:43,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:43,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 22:45:43,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:43,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 22:45:43,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:43,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:45:43,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:45:43,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:45:43,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:43,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-27 22:45:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:43,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:43,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:43,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 22:45:43,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:43,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:45:43,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-27 22:45:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:43,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:43,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 22:45:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:44,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:44,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:44,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 22:45:44,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:44,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 22:45:44,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:44,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:44,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-27 22:45:44,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:44,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 22:45:44,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271709220] [2020-10-27 22:45:44,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:45:44,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 22:45:44,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714076545] [2020-10-27 22:45:44,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 22:45:44,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:45:44,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 22:45:44,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 22:45:44,018 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-10-27 22:45:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:45:44,283 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-10-27 22:45:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 22:45:44,283 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-27 22:45:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:45:44,284 INFO L225 Difference]: With dead ends: 51 [2020-10-27 22:45:44,285 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 22:45:44,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:45:44,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 22:45:44,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 22:45:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 22:45:44,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-27 22:45:44,302 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 40 [2020-10-27 22:45:44,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:45:44,302 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-27 22:45:44,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 22:45:44,303 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-27 22:45:44,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 22:45:44,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:45:44,304 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:45:44,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 22:45:44,305 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:45:44,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:45:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1815970256, now seen corresponding path program 3 times [2020-10-27 22:45:44,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:45:44,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865308332] [2020-10-27 22:45:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:45:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:44,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:44,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:44,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:44,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:45,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:45,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 22:45:45,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 22:45:45,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1645 [2020-10-27 22:45:45,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:45:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 22:45:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 22:45:45,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:46,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:45:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:46,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:46,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:46,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:45:46,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:46,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:45:46,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:46,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:46,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:46,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:46,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:46,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:45:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:46,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:46,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:46,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:45:46,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:46,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:45:46,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:46,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:46,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 22:45:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:46,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:46,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:46,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:45:46,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:46,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:45:46,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:46,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:46,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:46,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:46,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:46,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 22:45:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:46,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:46,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:46,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:45:46,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:46,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 22:45:46,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:46,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:45:46,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:45:46,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 22:45:46,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 22:45:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 22:45:46,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865308332] [2020-10-27 22:45:46,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:45:46,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 22:45:46,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978643413] [2020-10-27 22:45:46,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 22:45:46,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:45:46,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 22:45:46,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 22:45:46,160 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-10-27 22:45:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:45:46,412 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-27 22:45:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 22:45:46,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-27 22:45:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:45:46,414 INFO L225 Difference]: With dead ends: 49 [2020-10-27 22:45:46,414 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 22:45:46,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 22:45:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 22:45:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 22:45:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 22:45:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-27 22:45:46,425 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 46 [2020-10-27 22:45:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:45:46,426 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-27 22:45:46,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 22:45:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-27 22:45:46,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 22:45:46,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:45:46,428 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:45:46,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 22:45:46,428 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:45:46,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:45:46,429 INFO L82 PathProgramCache]: Analyzing trace with hash -116435538, now seen corresponding path program 1 times [2020-10-27 22:45:46,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:45:46,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010021950] [2020-10-27 22:45:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:45:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:46,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:47,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:49,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:50,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:50,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:51,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:51,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 22:45:51,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:45:51,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 22:45:51,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:51,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 22:45:51,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 22:45:51,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 22:45:51,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:52,396 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-27 22:45:52,658 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-27 22:45:53,215 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-27 22:45:53,910 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 84 [2020-10-27 22:45:54,337 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-27 22:45:54,892 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-27 22:45:55,041 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2020-10-27 22:45:55,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:45:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:55,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:55,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:55,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:45:55,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:55,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:45:55,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:55,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:45:55,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:55,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:45:55,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:55,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:45:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:55,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:55,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:55,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:45:55,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:55,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-27 22:45:55,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:55,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 22:45:55,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:55,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 22:45:55,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:56,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 22:45:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:56,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:56,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:57,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:57,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:45:57,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:45:57,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1850 [2020-10-27 22:45:57,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:57,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 22:45:57,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:57,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 22:45:57,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:58,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 22:45:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:45:58,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:45:58,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:45:58,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:45:58,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:45:58,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-27 22:45:58,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:45:58,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 22:45:58,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:45:58,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 22:45:58,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:45:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 22:45:59,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010021950] [2020-10-27 22:45:59,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:45:59,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 22:45:59,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993761753] [2020-10-27 22:45:59,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 22:45:59,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:45:59,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 22:45:59,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2020-10-27 22:45:59,386 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 26 states. [2020-10-27 22:47:18,090 WARN L193 SmtUtils]: Spent 1.31 m on a formula simplification. DAG size of input: 225 DAG size of output: 214 [2020-10-27 22:47:19,437 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-27 22:47:19,879 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 80 [2020-10-27 22:47:24,998 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 124 DAG size of output: 118 [2020-10-27 22:47:27,203 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 123 DAG size of output: 123 [2020-10-27 22:47:37,632 WARN L193 SmtUtils]: Spent 7.77 s on a formula simplification. DAG size of input: 108 DAG size of output: 108 [2020-10-27 22:47:41,949 WARN L193 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 122 DAG size of output: 122 [2020-10-27 22:47:43,620 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 112 DAG size of output: 112 [2020-10-27 22:47:45,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:47:45,914 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2020-10-27 22:47:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 22:47:45,918 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 48 [2020-10-27 22:47:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:47:45,920 INFO L225 Difference]: With dead ends: 55 [2020-10-27 22:47:45,921 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 22:47:45,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 103.3s TimeCoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 22:47:45,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 22:47:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-10-27 22:47:45,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 22:47:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2020-10-27 22:47:45,946 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 48 [2020-10-27 22:47:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:47:45,947 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2020-10-27 22:47:45,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 22:47:45,947 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2020-10-27 22:47:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 22:47:45,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:47:45,953 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:47:45,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 22:47:45,953 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:47:45,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:47:45,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1415224692, now seen corresponding path program 2 times [2020-10-27 22:47:45,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:47:45,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069523439] [2020-10-27 22:47:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:47:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:47:45,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:46,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:46,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:50,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:47:50,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 22:47:50,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:47:50,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 22:47:50,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:47:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 22:47:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 22:47:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 22:47:50,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:47:51,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:47:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:47:51,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:51,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:47:51,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:47:51,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:47:51,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:47:51,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:47:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:47:51,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:47:51,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:47:51,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:47:51,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:47:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:47:51,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:51,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:47:51,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 22:47:51,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:47:51,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 22:47:51,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:47:51,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:47:51,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:47:51,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 22:47:51,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:47:51,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 22:47:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:47:51,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:51,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:47:51,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:47:51,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:47:51,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 22:47:51,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:47:51,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:47:51,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:47:51,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 22:47:51,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:47:51,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 22:47:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:47:51,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:51,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:47:51,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:47:51,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:47:51,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:47:51,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:47:51,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:47:51,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 22:47:51,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:47:51,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:47:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 22:47:51,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069523439] [2020-10-27 22:47:51,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:47:51,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 22:47:51,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113957954] [2020-10-27 22:47:51,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 22:47:51,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:47:51,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 22:47:51,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:47:51,207 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 11 states. [2020-10-27 22:47:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:47:52,143 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2020-10-27 22:47:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 22:47:52,144 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-27 22:47:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:47:52,146 INFO L225 Difference]: With dead ends: 93 [2020-10-27 22:47:52,146 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 22:47:52,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-27 22:47:52,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 22:47:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2020-10-27 22:47:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 22:47:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-27 22:47:52,167 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 50 [2020-10-27 22:47:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:47:52,167 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-27 22:47:52,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 22:47:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-27 22:47:52,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 22:47:52,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:47:52,169 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:47:52,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 22:47:52,169 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:47:52,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:47:52,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1048855980, now seen corresponding path program 3 times [2020-10-27 22:47:52,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:47:52,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540267571] [2020-10-27 22:47:52,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:47:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:47:52,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:52,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:52,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:55,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:57,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:57,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:47:57,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 22:47:57,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:47:57,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5286 [2020-10-27 22:47:57,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:47:57,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:47:57,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 22:47:57,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 22:47:57,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:47:57,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:47:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:47:57,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:57,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:47:57,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:47:57,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:47:57,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:47:57,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:47:57,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:47:57,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:47:57,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:47:57,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:47:57,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:47:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:47:57,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:57,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:47:57,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:47:57,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:47:57,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:47:57,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:47:57,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:47:57,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:47:57,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:47:57,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:47:57,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 22:47:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:47:57,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:57,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:47:57,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:47:57,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:47:57,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:47:57,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:47:57,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:47:57,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:47:57,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:47:57,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:47:57,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 22:47:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:47:57,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:57,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:47:57,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:47:57,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:47:57,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 22:47:57,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:47:57,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:47:57,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:47:57,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 22:47:57,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:47:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 22:47:57,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540267571] [2020-10-27 22:47:57,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:47:57,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 22:47:57,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208787645] [2020-10-27 22:47:57,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 22:47:57,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:47:57,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 22:47:57,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 22:47:57,667 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 10 states. [2020-10-27 22:47:58,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:47:58,551 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-10-27 22:47:58,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 22:47:58,552 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-27 22:47:58,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:47:58,554 INFO L225 Difference]: With dead ends: 96 [2020-10-27 22:47:58,554 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 22:47:58,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2020-10-27 22:47:58,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 22:47:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2020-10-27 22:47:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 22:47:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-27 22:47:58,564 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 50 [2020-10-27 22:47:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:47:58,564 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-27 22:47:58,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 22:47:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-27 22:47:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 22:47:58,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:47:58,566 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:47:58,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 22:47:58,566 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:47:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:47:58,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2146456908, now seen corresponding path program 4 times [2020-10-27 22:47:58,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:47:58,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290027886] [2020-10-27 22:47:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:47:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:47:58,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:58,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:47:58,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:02,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:03,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:48:03,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 22:48:03,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 22:48:03,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 22:48:03,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:48:03,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:48:03,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 22:48:03,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 22:48:03,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:48:03,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:48:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:48:03,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:03,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:48:03,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:48:03,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:48:03,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:48:03,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:48:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:48:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:48:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:48:03,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:48:03,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:48:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:48:03,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:03,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:48:03,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 22:48:03,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:48:03,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:48:03,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:48:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:48:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:48:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:48:03,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:48:03,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 22:48:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:48:03,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:03,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:48:03,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 22:48:03,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:48:03,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:48:03,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:48:03,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:48:03,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:48:03,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:48:03,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:48:03,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-27 22:48:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:48:03,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:03,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:48:03,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 22:48:03,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:48:03,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 22:48:03,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:48:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:48:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:48:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 22:48:03,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:48:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 22:48:03,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290027886] [2020-10-27 22:48:03,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:48:03,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 22:48:03,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190029508] [2020-10-27 22:48:03,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 22:48:03,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:48:03,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 22:48:03,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 22:48:03,780 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 10 states. [2020-10-27 22:48:04,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:48:04,341 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-10-27 22:48:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 22:48:04,342 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 22:48:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:48:04,343 INFO L225 Difference]: With dead ends: 72 [2020-10-27 22:48:04,344 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 22:48:04,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-10-27 22:48:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 22:48:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-10-27 22:48:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 22:48:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-27 22:48:04,355 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 54 [2020-10-27 22:48:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:48:04,355 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-27 22:48:04,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 22:48:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-27 22:48:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 22:48:04,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:48:04,356 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:48:04,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 22:48:04,357 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:48:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:48:04,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1194618314, now seen corresponding path program 5 times [2020-10-27 22:48:04,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:48:04,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674675771] [2020-10-27 22:48:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:48:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:48:04,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:05,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:06,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:07,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:08,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:09,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:48:09,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 22:48:09,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:48:09,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 22:48:09,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:48:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 22:48:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 22:48:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 22:48:09,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:48:09,872 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-27 22:48:10,047 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2020-10-27 22:48:10,574 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2020-10-27 22:48:10,984 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2020-10-27 22:48:11,353 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2020-10-27 22:48:11,790 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2020-10-27 22:48:12,189 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2020-10-27 22:48:14,525 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-27 22:48:14,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:48:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:48:14,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:14,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:48:14,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:48:14,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:48:14,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:48:14,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:48:14,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:48:14,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:48:14,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:48:14,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:48:14,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:48:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:48:14,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:14,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:48:14,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 22:48:14,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:48:14,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-27 22:48:14,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:48:14,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 22:48:14,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:48:14,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 22:48:14,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:48:15,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 22:48:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:48:15,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:16,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:48:16,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 22:48:16,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:48:16,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-27 22:48:16,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:48:16,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 22:48:16,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:48:16,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 22:48:16,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:48:17,328 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-27 22:48:17,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-27 22:48:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:48:17,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:17,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:48:17,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 22:48:17,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:48:17,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-27 22:48:17,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:48:17,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 22:48:17,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:48:17,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 22:48:17,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:48:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 22:48:17,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674675771] [2020-10-27 22:48:17,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:48:17,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 22:48:17,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636884986] [2020-10-27 22:48:17,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 22:48:17,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:48:17,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 22:48:17,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=745, Unknown=1, NotChecked=0, Total=812 [2020-10-27 22:48:17,762 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 29 states. [2020-10-27 22:48:19,310 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-27 22:48:20,260 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-27 22:48:23,042 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2020-10-27 22:48:27,655 WARN L193 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-10-27 22:48:32,236 WARN L193 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-10-27 22:48:39,105 WARN L193 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-27 22:48:45,956 WARN L193 SmtUtils]: Spent 6.46 s on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-27 22:48:52,676 WARN L193 SmtUtils]: Spent 6.46 s on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-27 22:48:55,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:48:55,049 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-10-27 22:48:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 22:48:55,051 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-10-27 22:48:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:48:55,053 INFO L225 Difference]: With dead ends: 77 [2020-10-27 22:48:55,053 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 22:48:55,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=155, Invalid=1823, Unknown=2, NotChecked=0, Total=1980 [2020-10-27 22:48:55,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 22:48:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-10-27 22:48:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 22:48:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-27 22:48:55,070 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 56 [2020-10-27 22:48:55,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:48:55,071 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-27 22:48:55,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 22:48:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-27 22:48:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 22:48:55,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:48:55,072 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:48:55,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 22:48:55,072 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:48:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:48:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash -866730840, now seen corresponding path program 6 times [2020-10-27 22:48:55,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:48:55,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838726010] [2020-10-27 22:48:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:48:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:48:55,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:55,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:48:55,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:00,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:00,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 22:49:00,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:49:00,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 22:49:00,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:00,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 22:49:00,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 22:49:00,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 22:49:00,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:00,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:49:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:00,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:00,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:00,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:49:00,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:49:00,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:49:00,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:00,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:49:00,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:49:00,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:49:00,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:00,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:49:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:00,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:00,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:00,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:49:00,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:49:00,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 22:49:00,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:00,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:49:00,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:49:00,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 22:49:00,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:00,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 22:49:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:00,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:00,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:00,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:00,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 22:49:00,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:49:00,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 22:49:00,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:00,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:49:00,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:49:00,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 22:49:00,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:00,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 22:49:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:00,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:00,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:00,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 22:49:00,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:49:00,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 22:49:00,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:00,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:49:00,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:49:00,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 22:49:00,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 18 proven. 104 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-27 22:49:00,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838726010] [2020-10-27 22:49:00,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:49:00,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 22:49:00,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834995368] [2020-10-27 22:49:00,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 22:49:00,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:49:00,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 22:49:00,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 22:49:00,359 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 13 states. [2020-10-27 22:49:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:49:01,484 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2020-10-27 22:49:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 22:49:01,485 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-10-27 22:49:01,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:49:01,486 INFO L225 Difference]: With dead ends: 130 [2020-10-27 22:49:01,486 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 22:49:01,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2020-10-27 22:49:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 22:49:01,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-27 22:49:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 22:49:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-27 22:49:01,498 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 58 [2020-10-27 22:49:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:49:01,498 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-27 22:49:01,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 22:49:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-27 22:49:01,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 22:49:01,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:49:01,499 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:49:01,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 22:49:01,500 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:49:01,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:49:01,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1380894568, now seen corresponding path program 7 times [2020-10-27 22:49:01,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:49:01,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693267400] [2020-10-27 22:49:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:49:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:01,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:01,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:01,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:04,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:06,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:06,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 22:49:06,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 22:49:06,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 22:49:06,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:06,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 22:49:06,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 22:49:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 22:49:06,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:06,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:49:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:06,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:06,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:06,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:49:06,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:49:06,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:49:06,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:06,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:49:06,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:49:06,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:49:06,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:06,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:49:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:06,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:06,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:06,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:49:06,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:49:06,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:49:06,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:06,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:49:06,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:49:06,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:49:06,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:06,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 22:49:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:06,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:06,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:06,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:49:06,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:49:06,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:49:06,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:06,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:49:06,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:49:06,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:49:06,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:06,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 22:49:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:06,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:06,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:06,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:49:06,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:49:06,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 22:49:06,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:49:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:49:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 22:49:06,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 97 proven. 11 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-27 22:49:06,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693267400] [2020-10-27 22:49:06,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:49:06,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 22:49:06,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313681189] [2020-10-27 22:49:06,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 22:49:06,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:49:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 22:49:06,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 22:49:06,729 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 12 states. [2020-10-27 22:49:07,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:49:07,507 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2020-10-27 22:49:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 22:49:07,508 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-27 22:49:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:49:07,509 INFO L225 Difference]: With dead ends: 82 [2020-10-27 22:49:07,509 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 22:49:07,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-10-27 22:49:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 22:49:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2020-10-27 22:49:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 22:49:07,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-27 22:49:07,539 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 62 [2020-10-27 22:49:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:49:07,540 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-27 22:49:07,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 22:49:07,540 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-27 22:49:07,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 22:49:07,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:49:07,541 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:49:07,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 22:49:07,542 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:49:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:49:07,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1879662822, now seen corresponding path program 8 times [2020-10-27 22:49:07,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:49:07,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645818185] [2020-10-27 22:49:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:49:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:07,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:08,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:10,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:12,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:12,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 22:49:12,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:49:12,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 22:49:12,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:12,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 22:49:12,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 22:49:12,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 22:49:12,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:13,165 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-27 22:49:13,325 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 22:49:13,610 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-27 22:49:14,062 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-27 22:49:14,578 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-27 22:49:15,045 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2020-10-27 22:49:15,455 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-27 22:49:15,770 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-27 22:49:16,102 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-27 22:49:16,375 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 22:49:16,606 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-27 22:49:16,876 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-27 22:49:17,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:49:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:17,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:17,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:17,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:49:17,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:49:17,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:49:17,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:17,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:49:17,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:49:17,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:49:17,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:17,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:49:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:17,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:17,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:17,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:49:17,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:49:17,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-27 22:49:17,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:17,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 22:49:17,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:49:17,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 22:49:17,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:21,226 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-27 22:49:21,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 22:49:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:21,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:21,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:21,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:22,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:22,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:22,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:49:22,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 22:49:22,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1291 [2020-10-27 22:49:22,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:22,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 22:49:22,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:49:22,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 22:49:22,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:49:24,458 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 25 [2020-10-27 22:49:24,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-27 22:49:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:49:24,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:49:24,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:49:24,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:49:24,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:49:24,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-27 22:49:24,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:49:24,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 22:49:24,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:49:24,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 22:49:24,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0