/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/res1o.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:15:25,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:15:25,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:15:25,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:15:25,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:15:25,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:15:25,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:15:25,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:15:25,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:15:25,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:15:25,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:15:25,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:15:25,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:15:25,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:15:25,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:15:25,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:15:25,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:15:25,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:15:25,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:15:26,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:15:26,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:15:26,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:15:26,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:15:26,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:15:26,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:15:26,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:15:26,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:15:26,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:15:26,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:15:26,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:15:26,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:15:26,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:15:26,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:15:26,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:15:26,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:15:26,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:15:26,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:15:26,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:15:26,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:15:26,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:15:26,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:15:26,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 09:15:26,094 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:15:26,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:15:26,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:15:26,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:15:26,098 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:15:26,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:15:26,099 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:15:26,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:15:26,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:15:26,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:15:26,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:15:26,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:15:26,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:15:26,101 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:15:26,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:15:26,101 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:15:26,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:15:26,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:15:26,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:15:26,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:15:26,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:15:26,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:15:26,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:15:26,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:15:26,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:15:26,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:15:26,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:15:26,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:15:26,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:15:26,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:15:26,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:15:26,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:15:26,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:15:26,525 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:15:26,526 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:15:26,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1o.c [2020-10-28 09:15:26,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49a85cdd5/5636473c4e9d42c8bfa0a4f6b45120e5/FLAGf551db7e1 [2020-10-28 09:15:27,255 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:15:27,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res1o.c [2020-10-28 09:15:27,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49a85cdd5/5636473c4e9d42c8bfa0a4f6b45120e5/FLAGf551db7e1 [2020-10-28 09:15:27,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49a85cdd5/5636473c4e9d42c8bfa0a4f6b45120e5 [2020-10-28 09:15:27,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:15:27,599 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:15:27,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:15:27,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:15:27,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:15:27,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:15:27" (1/1) ... [2020-10-28 09:15:27,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f134f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:27, skipping insertion in model container [2020-10-28 09:15:27,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:15:27" (1/1) ... [2020-10-28 09:15:27,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:15:27,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:15:27,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:15:27,817 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:15:27,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:15:27,856 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:15:27,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:27 WrapperNode [2020-10-28 09:15:27,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:15:27,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:15:27,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:15:27,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:15:27,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:27" (1/1) ... [2020-10-28 09:15:27,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:27" (1/1) ... [2020-10-28 09:15:27,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:27" (1/1) ... [2020-10-28 09:15:27,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:27" (1/1) ... [2020-10-28 09:15:27,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:27" (1/1) ... [2020-10-28 09:15:27,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:27" (1/1) ... [2020-10-28 09:15:27,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:27" (1/1) ... [2020-10-28 09:15:27,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:15:27,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:15:27,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:15:27,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:15:27,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:15:27,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:15:27,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:15:27,978 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:15:27,978 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:15:27,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:15:27,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:15:27,978 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:15:27,979 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:15:27,979 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:15:27,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:15:27,979 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:15:27,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:15:27,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:15:27,979 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:15:27,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:15:27,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:15:27,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:15:27,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:15:27,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:15:27,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:15:27,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:15:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:15:28,466 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:15:28,467 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 09:15:28,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:15:28 BoogieIcfgContainer [2020-10-28 09:15:28,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:15:28,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:15:28,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:15:28,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:15:28,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:15:27" (1/3) ... [2020-10-28 09:15:28,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23102850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:15:28, skipping insertion in model container [2020-10-28 09:15:28,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:27" (2/3) ... [2020-10-28 09:15:28,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23102850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:15:28, skipping insertion in model container [2020-10-28 09:15:28,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:15:28" (3/3) ... [2020-10-28 09:15:28,481 INFO L111 eAbstractionObserver]: Analyzing ICFG res1o.c [2020-10-28 09:15:28,493 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:15:28,497 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:15:28,511 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:15:28,557 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:15:28,557 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:15:28,557 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:15:28,558 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:15:28,558 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:15:28,558 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:15:28,558 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:15:28,558 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:15:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-28 09:15:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 09:15:28,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:28,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:28,592 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:28,603 INFO L82 PathProgramCache]: Analyzing trace with hash -181434534, now seen corresponding path program 1 times [2020-10-28 09:15:28,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:28,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192379617] [2020-10-28 09:15:28,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:28,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:28,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:29,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:29,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:29,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:29,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:31,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:31,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 09:15:31,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:15:31,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2459 [2020-10-28 09:15:31,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:31,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:31,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:31,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:15:31,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:31,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 09:15:31,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:31,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:31,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:31,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:31,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:31,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:15:31,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:31,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:31,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:31,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:31,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:31,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:31,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:31,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:15:31,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:31,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:31,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:31,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 09:15:31,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:31,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:31,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192379617] [2020-10-28 09:15:31,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:15:31,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:15:31,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102641958] [2020-10-28 09:15:31,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:15:31,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:31,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:15:31,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:15:31,489 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-28 09:15:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:31,605 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2020-10-28 09:15:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:15:31,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-28 09:15:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:31,615 INFO L225 Difference]: With dead ends: 69 [2020-10-28 09:15:31,615 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:15:31,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:15:31,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:15:31,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 09:15:31,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 09:15:31,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-28 09:15:31,660 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 26 [2020-10-28 09:15:31,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:31,660 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-28 09:15:31,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:15:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-28 09:15:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 09:15:31,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:31,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:31,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:15:31,662 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:31,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:31,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1769782436, now seen corresponding path program 1 times [2020-10-28 09:15:31,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:31,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617870190] [2020-10-28 09:15:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:31,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:31,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:31,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:31,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:31,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:32,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:32,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 09:15:32,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:15:32,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1186 [2020-10-28 09:15:32,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:32,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:15:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:15:32,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:15:32,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:32,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:32,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:32,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:32,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:32,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:32,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:15:32,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:32,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:32,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:32,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:32,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:32,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:32,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:32,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:32,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:32,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:32,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:32,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:15:32,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:32,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:32,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:32,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:32,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:32,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:32,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617870190] [2020-10-28 09:15:32,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:15:32,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:15:32,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932755274] [2020-10-28 09:15:32,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:15:32,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:32,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:15:32,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:15:32,959 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2020-10-28 09:15:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:33,133 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-10-28 09:15:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:15:33,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-28 09:15:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:33,135 INFO L225 Difference]: With dead ends: 51 [2020-10-28 09:15:33,135 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 09:15:33,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:15:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 09:15:33,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-28 09:15:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 09:15:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-28 09:15:33,146 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 26 [2020-10-28 09:15:33,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:33,147 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-28 09:15:33,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:15:33,147 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-28 09:15:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 09:15:33,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:33,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:33,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:15:33,149 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:33,149 INFO L82 PathProgramCache]: Analyzing trace with hash -697842092, now seen corresponding path program 1 times [2020-10-28 09:15:33,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:33,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106044216] [2020-10-28 09:15:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:33,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:33,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:34,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:34,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:34,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:34,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:36,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:37,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:38,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:38,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:38,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 09:15:38,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:15:38,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:15:38,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:38,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:38,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:15:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:15:38,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:38,931 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-10-28 09:15:39,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:39,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:39,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:39,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:39,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:39,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:15:39,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:39,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:39,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:39,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:39,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:39,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:39,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:39,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:39,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:39,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:39,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:39,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:39,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:39,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:39,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:39,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:39,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106044216] [2020-10-28 09:15:39,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:39,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:15:39,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796955620] [2020-10-28 09:15:39,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:15:39,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:39,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:15:39,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:15:39,372 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 19 states. [2020-10-28 09:15:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:40,686 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-28 09:15:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:15:40,686 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-10-28 09:15:40,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:40,688 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:15:40,688 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 09:15:40,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:15:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 09:15:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-28 09:15:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:15:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-28 09:15:40,701 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 34 [2020-10-28 09:15:40,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:40,701 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-28 09:15:40,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:15:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-28 09:15:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:15:40,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:40,705 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:40,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:15:40,705 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:40,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:40,706 INFO L82 PathProgramCache]: Analyzing trace with hash 583184370, now seen corresponding path program 2 times [2020-10-28 09:15:40,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:40,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010347254] [2020-10-28 09:15:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:40,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:40,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:40,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:43,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:43,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:15:43,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:15:43,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2337 [2020-10-28 09:15:43,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:43,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:43,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:15:43,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:43,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:15:43,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:43,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:43,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:43,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:43,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:43,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:43,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:15:43,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:43,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:43,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:43,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:43,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:43,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:43,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:43,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:43,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:43,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:43,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:43,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:15:43,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:43,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:43,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:43,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:43,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:15:43,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010347254] [2020-10-28 09:15:43,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:43,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:15:43,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915684080] [2020-10-28 09:15:43,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:15:43,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:43,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:15:43,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:15:43,188 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 8 states. [2020-10-28 09:15:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:43,438 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2020-10-28 09:15:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:15:43,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 09:15:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:43,441 INFO L225 Difference]: With dead ends: 96 [2020-10-28 09:15:43,441 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 09:15:43,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:15:43,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 09:15:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-10-28 09:15:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 09:15:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-28 09:15:43,452 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 36 [2020-10-28 09:15:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:43,453 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-28 09:15:43,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:15:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-28 09:15:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:15:43,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:43,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:43,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:15:43,455 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:43,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:43,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1529483086, now seen corresponding path program 3 times [2020-10-28 09:15:43,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:43,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780422032] [2020-10-28 09:15:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:43,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:43,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:43,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:43,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:44,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:46,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:46,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:46,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:48,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:48,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:48,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:48,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:15:48,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:15:48,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:15:48,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:48,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:48,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:15:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:15:48,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:15:48,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:48,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:48,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:48,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:48,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:48,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:15:48,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:48,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:48,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:48,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:48,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:48,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:48,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:48,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:48,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:48,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:48,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:48,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:15:48,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780422032] [2020-10-28 09:15:48,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:48,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:15:48,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964831260] [2020-10-28 09:15:48,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:15:48,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:48,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:15:48,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:15:48,580 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 8 states. [2020-10-28 09:15:48,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:48,892 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-28 09:15:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:15:48,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 09:15:48,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:48,894 INFO L225 Difference]: With dead ends: 58 [2020-10-28 09:15:48,894 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 09:15:48,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:15:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 09:15:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 09:15:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 09:15:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-28 09:15:48,907 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2020-10-28 09:15:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:48,909 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-28 09:15:48,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:15:48,909 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-28 09:15:48,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 09:15:48,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:48,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:48,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:15:48,912 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:48,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1178128052, now seen corresponding path program 4 times [2020-10-28 09:15:48,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:48,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555496859] [2020-10-28 09:15:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:48,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:50,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:50,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:52,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:52,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:53,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:53,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:53,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:53,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 09:15:53,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:15:53,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:15:53,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:53,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:15:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:15:53,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:55,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:55,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:55,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:55,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:55,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:55,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:15:55,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:55,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:55,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:55,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:55,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:55,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:55,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:55,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:55,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:55,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:55,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:55,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:55,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:55,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:55,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:55,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:55,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:55,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:55,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555496859] [2020-10-28 09:15:55,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:55,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:15:55,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841288583] [2020-10-28 09:15:55,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:15:55,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:55,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:15:55,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:15:55,703 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 27 states. [2020-10-28 09:15:56,427 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-28 09:15:56,961 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-28 09:15:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:58,716 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-28 09:15:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:15:58,717 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 42 [2020-10-28 09:15:58,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:58,719 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:15:58,719 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 09:15:58,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=445, Invalid=2207, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 09:15:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 09:15:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-28 09:15:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:15:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-28 09:15:58,732 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 42 [2020-10-28 09:15:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:58,733 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-28 09:15:58,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:15:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-28 09:15:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 09:15:58,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:58,734 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:58,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:15:58,734 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:58,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1410122518, now seen corresponding path program 5 times [2020-10-28 09:15:58,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:58,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210375122] [2020-10-28 09:15:58,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:58,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:58,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:03,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:03,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:16:03,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:16:03,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:16:03,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:03,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:16:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:03,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:16:03,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:16:03,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:03,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:03,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:03,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:03,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:03,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:16:03,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:03,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:03,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:03,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:03,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:03,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:03,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:03,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:03,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:03,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:03,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:03,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:03,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:03,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:03,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:03,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:03,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:03,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 09:16:03,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210375122] [2020-10-28 09:16:03,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:03,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:16:03,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260257828] [2020-10-28 09:16:03,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:16:03,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:03,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:16:03,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:16:03,888 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 10 states. [2020-10-28 09:16:04,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:04,269 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2020-10-28 09:16:04,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:16:04,269 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-28 09:16:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:04,271 INFO L225 Difference]: With dead ends: 118 [2020-10-28 09:16:04,271 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 09:16:04,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:16:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 09:16:04,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2020-10-28 09:16:04,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 09:16:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-28 09:16:04,294 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 44 [2020-10-28 09:16:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:04,295 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-28 09:16:04,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:16:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-28 09:16:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 09:16:04,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:04,297 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:04,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:16:04,297 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:04,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:04,298 INFO L82 PathProgramCache]: Analyzing trace with hash -443802198, now seen corresponding path program 6 times [2020-10-28 09:16:04,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:04,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134085736] [2020-10-28 09:16:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:04,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:07,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:07,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:08,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:08,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:16:09,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:16:09,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:16:09,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:16:09,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:09,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:16:09,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:09,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:09,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:09,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:09,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:09,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:09,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:09,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:09,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:09,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:09,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:09,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:09,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:09,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:09,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 09:16:09,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134085736] [2020-10-28 09:16:09,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:09,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:16:09,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177094143] [2020-10-28 09:16:09,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:16:09,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:09,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:16:09,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:16:09,451 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 10 states. [2020-10-28 09:16:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:09,816 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-10-28 09:16:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:16:09,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-28 09:16:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:09,818 INFO L225 Difference]: With dead ends: 70 [2020-10-28 09:16:09,818 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 09:16:09,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:16:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 09:16:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 09:16:09,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 09:16:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-28 09:16:09,828 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-10-28 09:16:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:09,829 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-28 09:16:09,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:16:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-28 09:16:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 09:16:09,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:09,831 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2020-10-28 09:16:09,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:16:09,832 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:09,832 INFO L82 PathProgramCache]: Analyzing trace with hash -460749756, now seen corresponding path program 7 times [2020-10-28 09:16:09,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:09,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211106773] [2020-10-28 09:16:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:10,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:10,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:11,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:12,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:12,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:13,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:13,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:14,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 09:16:14,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:16:14,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 09:16:14,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:14,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:14,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:16:14,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:14,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:16:14,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:16,798 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-28 09:16:16,971 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-28 09:16:17,152 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-28 09:16:17,494 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-28 09:16:18,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:18,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:18,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:18,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:18,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:16:18,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:18,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:18,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:18,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:18,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:18,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:18,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:18,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:18,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:18,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:18,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:18,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:18,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:18,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:18,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:18,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:18,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:18,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211106773] [2020-10-28 09:16:18,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:18,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:16:18,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009951653] [2020-10-28 09:16:18,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:16:18,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:18,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:16:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:16:18,294 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 34 states. [2020-10-28 09:16:18,627 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-28 09:16:18,853 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-10-28 09:16:19,107 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-10-28 09:16:19,346 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-28 09:16:20,166 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 86 [2020-10-28 09:16:20,470 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-10-28 09:16:20,653 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-28 09:16:20,849 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-28 09:16:21,508 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2020-10-28 09:16:21,851 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-28 09:16:22,069 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-28 09:16:22,409 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-28 09:16:22,667 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-28 09:16:22,879 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-28 09:16:23,079 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-28 09:16:23,706 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-28 09:16:24,022 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-28 09:16:24,377 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2020-10-28 09:16:24,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:24,629 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-10-28 09:16:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:16:24,630 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 50 [2020-10-28 09:16:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:24,632 INFO L225 Difference]: With dead ends: 78 [2020-10-28 09:16:24,632 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 09:16:24,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=495, Invalid=3411, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 09:16:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 09:16:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-28 09:16:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 09:16:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-28 09:16:24,644 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 50 [2020-10-28 09:16:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:24,644 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-28 09:16:24,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:16:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-28 09:16:24,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:16:24,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:24,645 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2020-10-28 09:16:24,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:16:24,646 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:24,646 INFO L82 PathProgramCache]: Analyzing trace with hash 236974690, now seen corresponding path program 8 times [2020-10-28 09:16:24,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:24,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239715170] [2020-10-28 09:16:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:24,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:24,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:24,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:29,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:16:29,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:16:29,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:16:29,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:29,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:29,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:16:29,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 09:16:29,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:16:29,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:29,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:29,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:29,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:29,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:29,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:29,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:29,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:29,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:29,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:29,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:29,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:29,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:29,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:29,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:29,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:29,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:29,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:29,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:29,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 09:16:29,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239715170] [2020-10-28 09:16:29,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:29,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:16:29,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384309061] [2020-10-28 09:16:29,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:16:29,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:29,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:16:29,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:16:29,840 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 12 states. [2020-10-28 09:16:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:30,372 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-28 09:16:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:16:30,373 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-28 09:16:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:30,374 INFO L225 Difference]: With dead ends: 82 [2020-10-28 09:16:30,374 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 09:16:30,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:16:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 09:16:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2020-10-28 09:16:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 09:16:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-28 09:16:30,385 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 52 [2020-10-28 09:16:30,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:30,385 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-28 09:16:30,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:16:30,385 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-28 09:16:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 09:16:30,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:30,386 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1] [2020-10-28 09:16:30,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:16:30,387 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:30,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:30,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2068696926, now seen corresponding path program 9 times [2020-10-28 09:16:30,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:30,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17998661] [2020-10-28 09:16:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:30,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:35,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:35,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 09:16:35,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:16:35,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:16:35,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:35,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:16:35,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:35,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:16:35,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:35,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:35,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:35,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:35,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:35,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:35,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:35,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:35,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:35,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:35,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:35,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:35,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:35,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:35,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:35,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:35,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:35,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:35,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:35,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:35,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:35,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 09:16:35,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17998661] [2020-10-28 09:16:35,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:35,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:16:35,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390018494] [2020-10-28 09:16:35,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:16:35,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:35,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:16:35,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:16:35,555 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 12 states. [2020-10-28 09:16:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:35,910 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-10-28 09:16:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:16:35,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-28 09:16:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:35,912 INFO L225 Difference]: With dead ends: 100 [2020-10-28 09:16:35,912 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 09:16:35,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:16:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 09:16:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2020-10-28 09:16:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 09:16:35,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-28 09:16:35,934 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 56 [2020-10-28 09:16:35,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:35,934 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-28 09:16:35,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:16:35,934 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-28 09:16:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 09:16:35,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:35,940 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:35,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:16:35,940 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash 76988220, now seen corresponding path program 10 times [2020-10-28 09:16:35,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:35,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379603547] [2020-10-28 09:16:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:35,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:36,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:37,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:38,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:39,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:39,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:40,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:40,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:40,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:16:40,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:16:40,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:16:40,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:40,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:40,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 09:16:40,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:40,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:16:40,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:41,625 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-28 09:16:42,879 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2020-10-28 09:16:43,197 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-28 09:16:43,365 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-28 09:16:43,552 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2020-10-28 09:16:43,741 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2020-10-28 09:16:43,947 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-28 09:16:44,142 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-10-28 09:16:44,696 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-28 09:16:44,876 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-28 09:16:45,064 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-28 09:16:45,243 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-28 09:16:45,427 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-28 09:16:46,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:46,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:46,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:46,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:46,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:46,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:46,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:46,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:46,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:46,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:46,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:46,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:46,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:46,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:46,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:46,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:46,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:46,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:46,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:46,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:46,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:46,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:46,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379603547] [2020-10-28 09:16:46,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:46,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 09:16:46,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493075427] [2020-10-28 09:16:46,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 09:16:46,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:46,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 09:16:46,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:16:46,086 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 42 states. [2020-10-28 09:16:47,247 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 85 [2020-10-28 09:16:47,572 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2020-10-28 09:16:47,945 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 85 [2020-10-28 09:16:48,190 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 52 [2020-10-28 09:16:48,453 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-28 09:16:48,967 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 80 [2020-10-28 09:16:49,162 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2020-10-28 09:16:49,361 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2020-10-28 09:16:49,577 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-28 09:16:49,840 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 58 [2020-10-28 09:16:50,238 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2020-10-28 09:16:50,558 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 73 [2020-10-28 09:16:50,842 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2020-10-28 09:16:51,092 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2020-10-28 09:16:51,538 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-28 09:16:53,406 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-10-28 09:16:54,017 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-28 09:16:54,281 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-28 09:16:54,529 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-28 09:16:55,268 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-28 09:16:55,856 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-28 09:16:56,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:56,630 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2020-10-28 09:16:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 09:16:56,630 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2020-10-28 09:16:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:56,632 INFO L225 Difference]: With dead ends: 100 [2020-10-28 09:16:56,632 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 09:16:56,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=973, Invalid=7037, Unknown=0, NotChecked=0, Total=8010 [2020-10-28 09:16:56,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 09:16:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2020-10-28 09:16:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 09:16:56,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-28 09:16:56,657 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 58 [2020-10-28 09:16:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:56,658 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-28 09:16:56,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 09:16:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-28 09:16:56,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 09:16:56,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:56,660 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:56,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:16:56,661 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:56,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:56,661 INFO L82 PathProgramCache]: Analyzing trace with hash 802406170, now seen corresponding path program 11 times [2020-10-28 09:16:56,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:56,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717522991] [2020-10-28 09:16:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:56,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:56,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:57,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:01,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 09:17:01,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:17:01,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:17:01,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:01,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:01,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:17:01,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:01,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:17:01,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:01,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:01,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:01,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:01,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:01,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:17:01,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:01,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:01,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:01,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:01,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:01,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:17:01,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:01,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:01,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:01,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:01,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:01,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:01,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:01,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:01,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:01,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:01,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:17:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 09:17:01,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717522991] [2020-10-28 09:17:01,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:01,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:17:01,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228900060] [2020-10-28 09:17:01,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:17:01,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:01,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:17:01,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:17:01,871 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 14 states. [2020-10-28 09:17:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:02,475 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-10-28 09:17:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:17:02,475 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-28 09:17:02,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:02,476 INFO L225 Difference]: With dead ends: 137 [2020-10-28 09:17:02,476 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 09:17:02,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:17:02,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 09:17:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2020-10-28 09:17:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:17:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-28 09:17:02,491 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 60 [2020-10-28 09:17:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:02,491 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-28 09:17:02,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:17:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-28 09:17:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 09:17:02,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:02,492 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:02,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:17:02,493 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:02,493 INFO L82 PathProgramCache]: Analyzing trace with hash -250417096, now seen corresponding path program 12 times [2020-10-28 09:17:02,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:02,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388089155] [2020-10-28 09:17:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:02,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:02,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:07,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:07,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 09:17:07,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:17:07,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:17:07,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:07,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:07,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:17:07,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:07,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:17:07,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:07,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:07,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:07,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:07,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:07,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:07,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:17:07,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:07,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:07,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:07,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:07,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:07,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:07,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:07,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:07,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:07,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:07,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:07,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:07,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:07,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:07,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-28 09:17:07,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388089155] [2020-10-28 09:17:07,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:07,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:17:07,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203120835] [2020-10-28 09:17:07,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:17:07,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:07,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:17:07,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:17:07,695 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 14 states. [2020-10-28 09:17:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:08,298 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-10-28 09:17:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:17:08,299 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-28 09:17:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:08,300 INFO L225 Difference]: With dead ends: 84 [2020-10-28 09:17:08,300 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 09:17:08,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:17:08,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 09:17:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 09:17:08,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:17:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-28 09:17:08,311 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 62 [2020-10-28 09:17:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:08,312 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-28 09:17:08,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:17:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-28 09:17:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:17:08,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:08,313 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:08,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:17:08,313 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash -774446540, now seen corresponding path program 13 times [2020-10-28 09:17:08,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:08,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255027078] [2020-10-28 09:17:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:08,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:08,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:10,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:11,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:13,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:13,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:13,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:17:13,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:17:13,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5542 [2020-10-28 09:17:13,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:13,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:13,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 09:17:13,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:13,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:17:13,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:14,844 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-28 09:17:15,154 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-10-28 09:17:15,370 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-28 09:17:15,606 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-28 09:17:15,797 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-28 09:17:16,013 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2020-10-28 09:17:16,211 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-28 09:17:16,433 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-28 09:17:16,607 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-28 09:17:16,819 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-28 09:17:17,370 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-28 09:17:17,552 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-28 09:17:17,762 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 44 [2020-10-28 09:17:17,969 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2020-10-28 09:17:18,179 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-28 09:17:18,380 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-28 09:17:18,607 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-28 09:17:18,821 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-28 09:17:19,026 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-28 09:17:19,373 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-28 09:17:19,720 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-28 09:17:20,099 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-28 09:17:21,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:21,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:21,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:21,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:21,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:21,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:21,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:21,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:21,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:21,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:21,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:21,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:21,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:21,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:21,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:21,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:21,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:21,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:21,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:21,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:21,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:21,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:21,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:21,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:17:21,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255027078] [2020-10-28 09:17:21,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:21,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 09:17:21,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256762043] [2020-10-28 09:17:21,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 09:17:21,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:21,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 09:17:21,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2136, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 09:17:21,104 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 49 states. [2020-10-28 09:17:22,141 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2020-10-28 09:17:22,627 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 44 [2020-10-28 09:17:22,929 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-28 09:17:23,242 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 57 [2020-10-28 09:17:23,531 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-28 09:17:23,911 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 68 [2020-10-28 09:17:24,191 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 47 [2020-10-28 09:17:24,411 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-10-28 09:17:24,711 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-10-28 09:17:24,945 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-28 09:17:25,324 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 63 [2020-10-28 09:17:25,593 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-28 09:17:25,817 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 53 [2020-10-28 09:17:26,192 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-10-28 09:17:26,800 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 82 [2020-10-28 09:17:27,351 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 71 [2020-10-28 09:17:27,703 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 72 [2020-10-28 09:17:27,937 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-28 09:17:28,244 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 76 [2020-10-28 09:17:28,543 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-28 09:17:28,857 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-10-28 09:17:29,125 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-28 09:17:29,423 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 59 [2020-10-28 09:17:29,950 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-28 09:17:30,171 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-28 09:17:30,362 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-28 09:17:30,564 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-28 09:17:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:33,465 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2020-10-28 09:17:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-28 09:17:33,466 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 66 [2020-10-28 09:17:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:33,467 INFO L225 Difference]: With dead ends: 98 [2020-10-28 09:17:33,467 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 09:17:33,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2897 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=979, Invalid=9527, Unknown=0, NotChecked=0, Total=10506 [2020-10-28 09:17:33,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 09:17:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2020-10-28 09:17:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:17:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-28 09:17:33,483 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 66 [2020-10-28 09:17:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:33,483 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-28 09:17:33,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 09:17:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-28 09:17:33,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 09:17:33,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:33,484 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:33,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:17:33,484 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:33,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:33,485 INFO L82 PathProgramCache]: Analyzing trace with hash -19246126, now seen corresponding path program 14 times [2020-10-28 09:17:33,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:33,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868369977] [2020-10-28 09:17:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:33,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:33,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:33,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:38,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:38,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:17:38,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:17:38,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:17:38,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:38,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:38,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:17:38,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:38,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 09:17:38,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:38,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:38,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:38,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:38,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:38,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:38,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:38,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:38,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:38,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:38,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:38,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:38,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:38,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:38,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:38,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:38,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:38,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:38,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:17:38,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:38,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:38,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:38,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:38,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:38,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-28 09:17:38,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868369977] [2020-10-28 09:17:38,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:38,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:17:38,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100767075] [2020-10-28 09:17:38,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:17:38,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:38,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:17:38,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:17:38,717 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 16 states. [2020-10-28 09:17:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:39,393 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2020-10-28 09:17:39,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:17:39,394 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-28 09:17:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:39,395 INFO L225 Difference]: With dead ends: 160 [2020-10-28 09:17:39,395 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 09:17:39,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:17:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 09:17:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2020-10-28 09:17:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 09:17:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-28 09:17:39,410 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 68 [2020-10-28 09:17:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:39,410 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-28 09:17:39,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:17:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-28 09:17:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 09:17:39,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:39,411 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:39,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:17:39,411 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1457976818, now seen corresponding path program 15 times [2020-10-28 09:17:39,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:39,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930667886] [2020-10-28 09:17:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:39,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:39,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:39,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:44,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:44,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 09:17:44,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:17:44,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:17:44,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:44,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:44,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:17:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:17:44,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:44,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:44,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:44,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:44,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:44,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:44,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:44,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:44,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:44,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:44,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:44,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:44,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:44,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:44,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:44,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:44,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:44,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:44,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:17:44,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:44,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:44,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:44,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:44,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:44,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 09:17:44,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930667886] [2020-10-28 09:17:44,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:44,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:17:44,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751012887] [2020-10-28 09:17:44,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:17:44,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:44,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:17:44,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:17:44,655 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 16 states. [2020-10-28 09:17:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:45,500 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-28 09:17:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:17:45,501 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-28 09:17:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:45,502 INFO L225 Difference]: With dead ends: 82 [2020-10-28 09:17:45,502 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 09:17:45,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:17:45,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 09:17:45,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-28 09:17:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:17:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-28 09:17:45,514 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 72 [2020-10-28 09:17:45,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:45,514 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-28 09:17:45,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:17:45,514 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-28 09:17:45,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 09:17:45,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:45,515 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:45,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:17:45,515 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:45,516 INFO L82 PathProgramCache]: Analyzing trace with hash 238153004, now seen corresponding path program 16 times [2020-10-28 09:17:45,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:45,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537917876] [2020-10-28 09:17:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:45,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:46,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:48,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:50,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:50,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:17:50,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:17:50,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:17:50,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:50,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-28 09:17:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:17:50,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:51,086 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-28 09:17:51,350 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-28 09:17:51,482 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-28 09:17:51,655 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-28 09:17:51,859 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-28 09:17:52,087 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-28 09:17:52,241 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-28 09:17:52,467 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-28 09:17:52,653 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-28 09:17:52,874 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-28 09:17:53,042 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-28 09:17:53,265 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-28 09:17:53,475 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-28 09:17:53,672 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 09:17:53,846 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-28 09:17:54,051 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-28 09:17:54,248 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-28 09:17:54,439 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-28 09:17:54,796 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2020-10-28 09:17:55,045 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-10-28 09:17:55,314 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2020-10-28 09:17:55,587 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2020-10-28 09:17:55,913 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 48 [2020-10-28 09:17:56,248 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2020-10-28 09:17:56,609 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 46 [2020-10-28 09:17:56,976 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 47 [2020-10-28 09:17:57,349 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 52 [2020-10-28 09:17:57,728 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 52 [2020-10-28 09:17:58,081 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-28 09:17:58,329 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-28 09:17:58,648 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-10-28 09:17:58,939 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-28 09:17:59,228 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-28 09:17:59,503 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-28 09:17:59,800 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2020-10-28 09:18:00,065 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-10-28 09:18:00,319 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-28 09:18:00,547 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-28 09:18:00,805 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-28 09:18:01,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:01,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:01,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:01,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:01,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:01,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:01,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:01,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:01,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:01,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:01,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:01,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:01,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:01,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:01,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:18:01,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:01,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:01,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:01,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:01,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:01,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 20 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:18:02,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537917876] [2020-10-28 09:18:02,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:02,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-28 09:18:02,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001657758] [2020-10-28 09:18:02,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-28 09:18:02,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:02,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-28 09:18:02,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2901, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 09:18:02,020 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 57 states. [2020-10-28 09:18:02,640 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 09:18:03,132 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2020-10-28 09:18:03,567 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-10-28 09:18:04,087 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 74 [2020-10-28 09:18:04,723 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 87 [2020-10-28 09:18:05,227 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 75 [2020-10-28 09:18:05,834 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 91 [2020-10-28 09:18:06,345 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 76 [2020-10-28 09:18:06,918 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 81 [2020-10-28 09:18:07,422 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 72 [2020-10-28 09:18:07,981 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 82 [2020-10-28 09:18:09,064 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 94 [2020-10-28 09:18:09,559 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 73 [2020-10-28 09:18:09,914 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 73 [2020-10-28 09:18:10,510 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 85 [2020-10-28 09:18:10,957 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 86 [2020-10-28 09:18:11,977 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 95 [2020-10-28 09:18:12,502 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 76 [2020-10-28 09:18:12,963 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 91 [2020-10-28 09:18:13,319 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 71 [2020-10-28 09:18:13,916 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 86 [2020-10-28 09:18:14,392 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 80 [2020-10-28 09:18:14,805 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 87 [2020-10-28 09:18:15,357 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 77 [2020-10-28 09:18:15,741 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 69 [2020-10-28 09:18:16,182 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 86 [2020-10-28 09:18:16,842 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 92 [2020-10-28 09:18:17,498 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 86 [2020-10-28 09:18:17,967 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 84 [2020-10-28 09:18:18,586 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 80 [2020-10-28 09:18:18,960 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-28 09:18:19,452 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 85 [2020-10-28 09:18:20,228 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 110 [2020-10-28 09:18:20,595 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-28 09:18:21,077 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2020-10-28 09:18:21,357 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-28 09:18:21,753 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2020-10-28 09:18:22,287 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-28 09:18:23,159 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-28 09:18:23,674 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-28 09:18:24,238 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-28 09:18:25,048 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-28 09:18:25,482 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2020-10-28 09:18:25,842 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2020-10-28 09:18:26,249 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 60 [2020-10-28 09:18:27,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:27,067 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-28 09:18:27,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-28 09:18:27,068 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 74 [2020-10-28 09:18:27,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:27,069 INFO L225 Difference]: With dead ends: 125 [2020-10-28 09:18:27,069 INFO L226 Difference]: Without dead ends: 118 [2020-10-28 09:18:27,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2914 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=1589, Invalid=11293, Unknown=0, NotChecked=0, Total=12882 [2020-10-28 09:18:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-28 09:18:27,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-28 09:18:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 09:18:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2020-10-28 09:18:27,091 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 74 [2020-10-28 09:18:27,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:27,092 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2020-10-28 09:18:27,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-28 09:18:27,092 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2020-10-28 09:18:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:18:27,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:27,093 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:27,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:18:27,093 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:27,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:27,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1868660534, now seen corresponding path program 17 times [2020-10-28 09:18:27,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:27,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654298150] [2020-10-28 09:18:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:27,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:27,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:27,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:32,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:32,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 09:18:32,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:18:32,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:18:32,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:32,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:32,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:18:32,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:32,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:18:32,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:32,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:32,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:32,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:32,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:32,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:32,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:32,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:32,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:32,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:32,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:32,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:32,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:32,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:32,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:32,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:18:32,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:32,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:32,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:32,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:32,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:32,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 09:18:32,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654298150] [2020-10-28 09:18:32,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:32,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:18:32,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252524883] [2020-10-28 09:18:32,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:18:32,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:32,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:18:32,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:18:32,392 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand 18 states. [2020-10-28 09:18:33,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:33,204 INFO L93 Difference]: Finished difference Result 192 states and 204 transitions. [2020-10-28 09:18:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:18:33,205 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-28 09:18:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:33,207 INFO L225 Difference]: With dead ends: 192 [2020-10-28 09:18:33,207 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 09:18:33,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:18:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 09:18:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2020-10-28 09:18:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 09:18:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-28 09:18:33,223 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 76 [2020-10-28 09:18:33,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:33,224 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-28 09:18:33,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:18:33,224 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-28 09:18:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 09:18:33,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:33,224 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:33,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:18:33,225 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:33,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1984788952, now seen corresponding path program 18 times [2020-10-28 09:18:33,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:33,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993649140] [2020-10-28 09:18:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:33,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:33,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:33,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:33,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:38,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:38,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 09:18:38,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:18:38,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:18:38,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:38,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:38,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:18:38,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:38,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 09:18:38,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:38,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:38,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:38,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:38,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:38,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:38,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:18:38,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:38,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:38,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:38,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:38,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:38,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:38,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:38,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:38,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:38,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:38,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:38,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:38,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:38,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:38,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-28 09:18:38,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993649140] [2020-10-28 09:18:38,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:38,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:18:38,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388517562] [2020-10-28 09:18:38,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:18:38,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:38,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:18:38,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:18:38,623 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 18 states. [2020-10-28 09:18:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:39,763 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-10-28 09:18:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:18:39,764 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-10-28 09:18:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:39,765 INFO L225 Difference]: With dead ends: 104 [2020-10-28 09:18:39,766 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 09:18:39,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:18:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 09:18:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-28 09:18:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:18:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-10-28 09:18:39,779 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 78 [2020-10-28 09:18:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:39,780 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-10-28 09:18:39,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:18:39,780 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-10-28 09:18:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 09:18:39,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:39,781 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:39,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:18:39,781 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:39,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2054168540, now seen corresponding path program 19 times [2020-10-28 09:18:39,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:39,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862138928] [2020-10-28 09:18:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:39,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:41,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:44,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:44,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 09:18:44,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:18:44,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:18:44,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:44,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:44,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-28 09:18:44,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:44,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 09:18:44,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:45,958 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-28 09:18:46,097 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-28 09:18:46,275 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-28 09:18:46,440 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-28 09:18:46,670 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-28 09:18:46,885 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2020-10-28 09:18:47,091 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-28 09:18:47,286 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-28 09:18:47,476 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-28 09:18:47,673 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-28 09:18:47,931 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 59 [2020-10-28 09:18:48,177 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2020-10-28 09:18:48,423 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2020-10-28 09:18:48,650 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-28 09:18:48,892 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-28 09:18:49,178 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2020-10-28 09:18:49,419 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-10-28 09:18:49,732 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2020-10-28 09:18:49,964 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2020-10-28 09:18:50,275 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2020-10-28 09:18:50,512 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2020-10-28 09:18:50,767 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2020-10-28 09:18:50,937 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2020-10-28 09:18:51,293 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 22 [2020-10-28 09:18:51,544 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2020-10-28 09:18:51,792 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2020-10-28 09:18:52,119 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 34 [2020-10-28 09:18:52,441 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 36 [2020-10-28 09:18:52,805 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 39 [2020-10-28 09:18:53,155 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 38 [2020-10-28 09:18:53,543 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 45 [2020-10-28 09:18:53,924 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 46 [2020-10-28 09:18:54,308 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 51 [2020-10-28 09:18:54,726 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2020-10-28 09:18:55,121 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-10-28 09:18:55,473 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2020-10-28 09:18:55,886 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-10-28 09:18:56,279 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2020-10-28 09:18:56,607 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-28 09:18:57,047 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2020-10-28 09:18:57,401 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-28 09:18:57,758 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-28 09:18:58,113 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-28 09:18:58,558 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-28 09:18:58,883 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-28 09:18:59,226 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-28 09:18:59,550 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-28 09:18:59,858 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-28 09:19:00,141 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-28 09:19:00,466 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-28 09:19:00,729 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-28 09:19:01,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:01,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:01,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:01,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:01,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:01,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:01,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:01,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:01,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:01,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:01,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:01,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:01,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:01,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:01,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:01,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:01,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:01,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:01,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:01,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:01,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:01,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:01,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:01,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 20 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:01,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862138928] [2020-10-28 09:19:01,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:01,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-28 09:19:01,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616047128] [2020-10-28 09:19:01,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-28 09:19:01,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:01,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-28 09:19:01,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=3938, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 09:19:01,620 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 66 states. [2020-10-28 09:19:04,343 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 91 [2020-10-28 09:19:04,772 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-28 09:19:05,153 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-28 09:19:05,536 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-28 09:19:06,087 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 83 [2020-10-28 09:19:06,628 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 76 [2020-10-28 09:19:07,213 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 95 [2020-10-28 09:19:07,706 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-28 09:19:08,040 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-10-28 09:19:08,419 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-28 09:19:08,661 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-28 09:19:08,969 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-28 09:19:09,796 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-28 09:19:10,097 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-28 09:19:11,713 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49