/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:28:42,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:28:42,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:28:42,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:28:42,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:28:42,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:28:42,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:28:42,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:28:42,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:28:42,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:28:42,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:28:42,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:28:42,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:28:42,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:28:42,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:28:42,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:28:42,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:28:42,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:28:42,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:28:42,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:28:42,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:28:42,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:28:42,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:28:42,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:28:42,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:28:42,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:28:42,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:28:42,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:28:42,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:28:42,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:28:42,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:28:42,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:28:42,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:28:42,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:28:42,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:28:42,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:28:42,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:28:42,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:28:42,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:28:42,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:28:42,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:28:42,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:28:42,252 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:28:42,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:28:42,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:28:42,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:28:42,255 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:28:42,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:28:42,255 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:28:42,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:28:42,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:28:42,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:28:42,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:28:42,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:28:42,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:28:42,257 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:28:42,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:28:42,257 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:28:42,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:28:42,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:28:42,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:28:42,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:28:42,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:28:42,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:28:42,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:28:42,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:28:42,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:28:42,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:28:42,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:28:42,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:28:42,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:28:42,260 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:28:42,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:28:42,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:28:42,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:28:42,717 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:28:42,718 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:28:42,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-10-27 01:28:42,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a48c397e/fbba4470af274b0eaf5d63a3c54b82e3/FLAGf7b38ccd4 [2020-10-27 01:28:43,576 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:28:43,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-10-27 01:28:43,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a48c397e/fbba4470af274b0eaf5d63a3c54b82e3/FLAGf7b38ccd4 [2020-10-27 01:28:43,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a48c397e/fbba4470af274b0eaf5d63a3c54b82e3 [2020-10-27 01:28:43,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:28:43,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:28:43,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:28:43,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:28:43,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:28:43,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:28:43" (1/1) ... [2020-10-27 01:28:43,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c24b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:43, skipping insertion in model container [2020-10-27 01:28:43,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:28:43" (1/1) ... [2020-10-27 01:28:43,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:28:43,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:28:44,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:28:44,129 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:28:44,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:28:44,182 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:28:44,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:44 WrapperNode [2020-10-27 01:28:44,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:28:44,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:28:44,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:28:44,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:28:44,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:44" (1/1) ... [2020-10-27 01:28:44,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:44" (1/1) ... [2020-10-27 01:28:44,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:44" (1/1) ... [2020-10-27 01:28:44,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:44" (1/1) ... [2020-10-27 01:28:44,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:44" (1/1) ... [2020-10-27 01:28:44,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:44" (1/1) ... [2020-10-27 01:28:44,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:44" (1/1) ... [2020-10-27 01:28:44,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:28:44,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:28:44,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:28:44,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:28:44,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:28:44,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:28:44,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:28:44,388 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:28:44,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:28:44,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:28:44,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:28:44,389 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:28:44,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:28:44,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:28:44,389 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:28:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:28:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:28:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:28:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:28:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:28:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:28:44,936 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:28:44,936 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:28:44,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:28:44 BoogieIcfgContainer [2020-10-27 01:28:44,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:28:44,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:28:44,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:28:44,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:28:44,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:28:43" (1/3) ... [2020-10-27 01:28:44,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d81ea0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:28:44, skipping insertion in model container [2020-10-27 01:28:44,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:44" (2/3) ... [2020-10-27 01:28:44,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d81ea0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:28:44, skipping insertion in model container [2020-10-27 01:28:44,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:28:44" (3/3) ... [2020-10-27 01:28:44,951 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-10-27 01:28:44,966 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:28:44,973 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:28:44,989 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:28:45,022 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:28:45,023 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:28:45,023 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:28:45,023 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:28:45,023 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:28:45,023 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:28:45,023 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:28:45,024 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:28:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-10-27 01:28:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:28:45,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:45,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:45,055 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:45,063 INFO L82 PathProgramCache]: Analyzing trace with hash 270724770, now seen corresponding path program 1 times [2020-10-27 01:28:45,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:45,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261680631] [2020-10-27 01:28:45,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:45,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:45,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:45,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:28:45,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:45,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-27 01:28:45,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:45,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:45,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:28:45,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:28:45,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:28:45,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:45,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:45,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:45,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:45,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:45,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:28:45,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:45,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:28:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:45,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261680631] [2020-10-27 01:28:45,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:45,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:45,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383390432] [2020-10-27 01:28:45,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:45,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:45,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:45,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:45,779 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2020-10-27 01:28:46,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:46,281 INFO L93 Difference]: Finished difference Result 86 states and 145 transitions. [2020-10-27 01:28:46,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:46,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 01:28:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:46,296 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:28:46,297 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:28:46,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:28:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2020-10-27 01:28:46,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:28:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 83 transitions. [2020-10-27 01:28:46,356 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 83 transitions. Word has length 21 [2020-10-27 01:28:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:46,357 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 83 transitions. [2020-10-27 01:28:46,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 83 transitions. [2020-10-27 01:28:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:28:46,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:46,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:46,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:28:46,359 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:46,360 INFO L82 PathProgramCache]: Analyzing trace with hash -316081244, now seen corresponding path program 1 times [2020-10-27 01:28:46,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:46,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487416282] [2020-10-27 01:28:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:46,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:46,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:28:46,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:46,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 01:28:46,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:46,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:46,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:28:46,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:46,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:46,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:46,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:46,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:46,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:46,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:46,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:28:46,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:46,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:46,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:46,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487416282] [2020-10-27 01:28:46,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:46,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:46,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078250973] [2020-10-27 01:28:46,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:46,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:46,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:46,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:46,623 INFO L87 Difference]: Start difference. First operand 48 states and 83 transitions. Second operand 4 states. [2020-10-27 01:28:46,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:46,806 INFO L93 Difference]: Finished difference Result 109 states and 195 transitions. [2020-10-27 01:28:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:46,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 01:28:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:46,809 INFO L225 Difference]: With dead ends: 109 [2020-10-27 01:28:46,809 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:28:46,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:46,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:28:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-27 01:28:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 01:28:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 115 transitions. [2020-10-27 01:28:46,826 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 115 transitions. Word has length 21 [2020-10-27 01:28:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:46,826 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 115 transitions. [2020-10-27 01:28:46,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 115 transitions. [2020-10-27 01:28:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:28:46,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:46,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:46,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:28:46,828 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:46,829 INFO L82 PathProgramCache]: Analyzing trace with hash -190848284, now seen corresponding path program 1 times [2020-10-27 01:28:46,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:46,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465661688] [2020-10-27 01:28:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:46,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:46,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:47,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:47,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:28:47,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:47,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-27 01:28:47,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:47,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:47,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:28:47,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:47,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:28:47,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:47,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:47,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:47,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:47,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:47,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:28:47,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:47,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:47,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465661688] [2020-10-27 01:28:47,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:47,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:47,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309967472] [2020-10-27 01:28:47,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:47,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:47,163 INFO L87 Difference]: Start difference. First operand 66 states and 115 transitions. Second operand 4 states. [2020-10-27 01:28:47,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:47,326 INFO L93 Difference]: Finished difference Result 101 states and 174 transitions. [2020-10-27 01:28:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:47,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 01:28:47,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:47,329 INFO L225 Difference]: With dead ends: 101 [2020-10-27 01:28:47,329 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:28:47,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:47,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:28:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-27 01:28:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:28:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 117 transitions. [2020-10-27 01:28:47,341 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 117 transitions. Word has length 22 [2020-10-27 01:28:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:47,342 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 117 transitions. [2020-10-27 01:28:47,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 117 transitions. [2020-10-27 01:28:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:28:47,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:47,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:47,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:28:47,344 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:47,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:47,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1201965534, now seen corresponding path program 1 times [2020-10-27 01:28:47,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:47,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604364788] [2020-10-27 01:28:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:47,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:47,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:47,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:28:47,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:47,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 01:28:47,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:47,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:47,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:28:47,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:47,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:47,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:47,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:47,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:47,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:47,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:47,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:28:47,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:47,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:47,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:47,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:47,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:47,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604364788] [2020-10-27 01:28:47,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:47,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:47,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061989784] [2020-10-27 01:28:47,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:47,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:47,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:47,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:47,473 INFO L87 Difference]: Start difference. First operand 69 states and 117 transitions. Second operand 4 states. [2020-10-27 01:28:47,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:47,645 INFO L93 Difference]: Finished difference Result 185 states and 326 transitions. [2020-10-27 01:28:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:47,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 01:28:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:47,647 INFO L225 Difference]: With dead ends: 185 [2020-10-27 01:28:47,648 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 01:28:47,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 01:28:47,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-27 01:28:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 01:28:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 214 transitions. [2020-10-27 01:28:47,663 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 214 transitions. Word has length 22 [2020-10-27 01:28:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:47,664 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 214 transitions. [2020-10-27 01:28:47,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 214 transitions. [2020-10-27 01:28:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:28:47,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:47,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:47,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:28:47,666 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:47,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:47,666 INFO L82 PathProgramCache]: Analyzing trace with hash -615159520, now seen corresponding path program 1 times [2020-10-27 01:28:47,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:47,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285770726] [2020-10-27 01:28:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:47,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:47,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:47,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:28:47,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:47,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 01:28:47,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:47,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:47,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:28:47,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:28:47,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:47,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:47,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:47,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:47,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:47,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:47,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:28:47,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:47,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:47,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:47,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:47,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:47,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285770726] [2020-10-27 01:28:47,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:47,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:47,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716543883] [2020-10-27 01:28:47,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:47,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:47,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:47,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:47,800 INFO L87 Difference]: Start difference. First operand 124 states and 214 transitions. Second operand 4 states. [2020-10-27 01:28:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:47,951 INFO L93 Difference]: Finished difference Result 160 states and 277 transitions. [2020-10-27 01:28:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:47,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 01:28:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:47,954 INFO L225 Difference]: With dead ends: 160 [2020-10-27 01:28:47,954 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 01:28:47,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:47,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 01:28:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 124. [2020-10-27 01:28:47,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 01:28:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 212 transitions. [2020-10-27 01:28:47,967 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 212 transitions. Word has length 22 [2020-10-27 01:28:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:47,967 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 212 transitions. [2020-10-27 01:28:47,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 212 transitions. [2020-10-27 01:28:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:28:47,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:47,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:47,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:28:47,969 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:47,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:47,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1400403119, now seen corresponding path program 1 times [2020-10-27 01:28:47,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:47,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145107379] [2020-10-27 01:28:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:47,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:48,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:48,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:28:48,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:48,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 01:28:48,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:48,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:48,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:28:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:28:48,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:48,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:48,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:48,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:48,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:48,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:48,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:28:48,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:48,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:48,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:48,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:48,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:28:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:48,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145107379] [2020-10-27 01:28:48,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:48,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:48,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928573332] [2020-10-27 01:28:48,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:48,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:48,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:48,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:48,107 INFO L87 Difference]: Start difference. First operand 124 states and 212 transitions. Second operand 4 states. [2020-10-27 01:28:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:48,291 INFO L93 Difference]: Finished difference Result 228 states and 397 transitions. [2020-10-27 01:28:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:48,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 01:28:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:48,297 INFO L225 Difference]: With dead ends: 228 [2020-10-27 01:28:48,297 INFO L226 Difference]: Without dead ends: 225 [2020-10-27 01:28:48,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:48,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-27 01:28:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2020-10-27 01:28:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 01:28:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 286 transitions. [2020-10-27 01:28:48,333 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 286 transitions. Word has length 23 [2020-10-27 01:28:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:48,333 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 286 transitions. [2020-10-27 01:28:48,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 286 transitions. [2020-10-27 01:28:48,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:28:48,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:48,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:48,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:28:48,336 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:48,339 INFO L82 PathProgramCache]: Analyzing trace with hash 813597105, now seen corresponding path program 1 times [2020-10-27 01:28:48,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:48,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219171862] [2020-10-27 01:28:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:48,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:48,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:48,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:28:48,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:48,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 01:28:48,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:48,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:48,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:28:48,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:48,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:48,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:48,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:48,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:48,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:48,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:48,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:28:48,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:48,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:28:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:48,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219171862] [2020-10-27 01:28:48,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:48,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:48,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342493062] [2020-10-27 01:28:48,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:48,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:48,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:48,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:48,534 INFO L87 Difference]: Start difference. First operand 168 states and 286 transitions. Second operand 4 states. [2020-10-27 01:28:48,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:48,718 INFO L93 Difference]: Finished difference Result 392 states and 677 transitions. [2020-10-27 01:28:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:48,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 01:28:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:48,720 INFO L225 Difference]: With dead ends: 392 [2020-10-27 01:28:48,720 INFO L226 Difference]: Without dead ends: 233 [2020-10-27 01:28:48,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:48,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-27 01:28:48,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-27 01:28:48,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-27 01:28:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 392 transitions. [2020-10-27 01:28:48,736 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 392 transitions. Word has length 23 [2020-10-27 01:28:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:48,737 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 392 transitions. [2020-10-27 01:28:48,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:48,737 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 392 transitions. [2020-10-27 01:28:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:28:48,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:48,739 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] [2020-10-27 01:28:48,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:28:48,739 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:48,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:48,740 INFO L82 PathProgramCache]: Analyzing trace with hash 469463309, now seen corresponding path program 1 times [2020-10-27 01:28:48,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:48,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087080452] [2020-10-27 01:28:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:48,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:48,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:48,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:48,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:28:48,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:48,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-27 01:28:48,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:48,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:48,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:28:48,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:48,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:48,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:48,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:48,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:48,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:48,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:48,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:28:48,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:48,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:48,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087080452] [2020-10-27 01:28:48,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:48,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:48,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167808319] [2020-10-27 01:28:48,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:48,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:48,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:48,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:48,953 INFO L87 Difference]: Start difference. First operand 232 states and 392 transitions. Second operand 4 states. [2020-10-27 01:28:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:49,116 INFO L93 Difference]: Finished difference Result 350 states and 591 transitions. [2020-10-27 01:28:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:49,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 01:28:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:49,119 INFO L225 Difference]: With dead ends: 350 [2020-10-27 01:28:49,120 INFO L226 Difference]: Without dead ends: 239 [2020-10-27 01:28:49,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-27 01:28:49,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2020-10-27 01:28:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-27 01:28:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 396 transitions. [2020-10-27 01:28:49,149 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 396 transitions. Word has length 24 [2020-10-27 01:28:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:49,149 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 396 transitions. [2020-10-27 01:28:49,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 396 transitions. [2020-10-27 01:28:49,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:28:49,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:49,158 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] [2020-10-27 01:28:49,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:28:49,160 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:49,162 INFO L82 PathProgramCache]: Analyzing trace with hash -541653941, now seen corresponding path program 1 times [2020-10-27 01:28:49,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:49,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071230070] [2020-10-27 01:28:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:49,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:49,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:49,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:28:49,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:49,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 01:28:49,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:49,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:49,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 01:28:49,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:28:49,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:28:49,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:49,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:49,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:49,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:49,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:49,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:28:49,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:49,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:49,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:49,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:49,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:49,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071230070] [2020-10-27 01:28:49,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:49,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:49,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41110364] [2020-10-27 01:28:49,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:49,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:49,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:49,320 INFO L87 Difference]: Start difference. First operand 238 states and 396 transitions. Second operand 4 states. [2020-10-27 01:28:49,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:49,517 INFO L93 Difference]: Finished difference Result 430 states and 727 transitions. [2020-10-27 01:28:49,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:49,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 01:28:49,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:49,521 INFO L225 Difference]: With dead ends: 430 [2020-10-27 01:28:49,521 INFO L226 Difference]: Without dead ends: 427 [2020-10-27 01:28:49,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-27 01:28:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 330. [2020-10-27 01:28:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-27 01:28:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 540 transitions. [2020-10-27 01:28:49,543 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 540 transitions. Word has length 24 [2020-10-27 01:28:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:49,543 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 540 transitions. [2020-10-27 01:28:49,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 540 transitions. [2020-10-27 01:28:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:28:49,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:49,544 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] [2020-10-27 01:28:49,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:28:49,545 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:49,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1128459955, now seen corresponding path program 1 times [2020-10-27 01:28:49,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:49,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138688518] [2020-10-27 01:28:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:49,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:49,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:49,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:28:49,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:49,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-27 01:28:49,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:49,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:49,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 01:28:49,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:49,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:49,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:49,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:49,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:49,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:49,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:49,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:49,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:49,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:49,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:49,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:49,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:49,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138688518] [2020-10-27 01:28:49,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:49,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:49,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139170037] [2020-10-27 01:28:49,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:49,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:49,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:49,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:49,745 INFO L87 Difference]: Start difference. First operand 330 states and 540 transitions. Second operand 4 states. [2020-10-27 01:28:49,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:49,907 INFO L93 Difference]: Finished difference Result 766 states and 1263 transitions. [2020-10-27 01:28:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:49,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 01:28:49,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:49,911 INFO L225 Difference]: With dead ends: 766 [2020-10-27 01:28:49,911 INFO L226 Difference]: Without dead ends: 451 [2020-10-27 01:28:49,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-27 01:28:49,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 450. [2020-10-27 01:28:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-27 01:28:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 728 transitions. [2020-10-27 01:28:49,951 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 728 transitions. Word has length 24 [2020-10-27 01:28:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:49,952 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 728 transitions. [2020-10-27 01:28:49,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 728 transitions. [2020-10-27 01:28:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:28:49,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:49,954 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] [2020-10-27 01:28:49,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:28:49,954 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:49,955 INFO L82 PathProgramCache]: Analyzing trace with hash 395247164, now seen corresponding path program 1 times [2020-10-27 01:28:49,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:49,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164295227] [2020-10-27 01:28:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:49,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:49,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:50,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:50,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:28:50,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:50,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 01:28:50,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:50,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:50,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 01:28:50,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:50,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:50,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:50,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:50,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:50,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:50,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:50,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:50,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:50,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:50,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:50,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:50,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:50,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164295227] [2020-10-27 01:28:50,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:50,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:50,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211981450] [2020-10-27 01:28:50,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:50,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:50,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:50,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:50,189 INFO L87 Difference]: Start difference. First operand 450 states and 728 transitions. Second operand 4 states. [2020-10-27 01:28:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:50,383 INFO L93 Difference]: Finished difference Result 674 states and 1087 transitions. [2020-10-27 01:28:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:50,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 01:28:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:50,389 INFO L225 Difference]: With dead ends: 674 [2020-10-27 01:28:50,390 INFO L226 Difference]: Without dead ends: 459 [2020-10-27 01:28:50,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:50,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-27 01:28:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 458. [2020-10-27 01:28:50,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-27 01:28:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 728 transitions. [2020-10-27 01:28:50,412 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 728 transitions. Word has length 25 [2020-10-27 01:28:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:50,412 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 728 transitions. [2020-10-27 01:28:50,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:50,412 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 728 transitions. [2020-10-27 01:28:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:28:50,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:50,414 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] [2020-10-27 01:28:50,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:28:50,414 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:50,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:50,415 INFO L82 PathProgramCache]: Analyzing trace with hash -615870086, now seen corresponding path program 1 times [2020-10-27 01:28:50,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:50,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818440790] [2020-10-27 01:28:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:50,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:50,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:50,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:28:50,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:50,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 01:28:50,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:50,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:50,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:28:50,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:28:50,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:50,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:50,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:50,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:50,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:50,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:50,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:28:50,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:50,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:50,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:50,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:50,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:50,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818440790] [2020-10-27 01:28:50,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:50,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:50,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027810749] [2020-10-27 01:28:50,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:50,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:50,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:50,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:50,530 INFO L87 Difference]: Start difference. First operand 458 states and 728 transitions. Second operand 4 states. [2020-10-27 01:28:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:50,763 INFO L93 Difference]: Finished difference Result 814 states and 1315 transitions. [2020-10-27 01:28:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:50,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 01:28:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:50,769 INFO L225 Difference]: With dead ends: 814 [2020-10-27 01:28:50,770 INFO L226 Difference]: Without dead ends: 811 [2020-10-27 01:28:50,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-10-27 01:28:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 650. [2020-10-27 01:28:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-10-27 01:28:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1008 transitions. [2020-10-27 01:28:50,804 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1008 transitions. Word has length 25 [2020-10-27 01:28:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:50,805 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 1008 transitions. [2020-10-27 01:28:50,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1008 transitions. [2020-10-27 01:28:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:28:50,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:50,807 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] [2020-10-27 01:28:50,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:28:50,807 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:50,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1202676100, now seen corresponding path program 1 times [2020-10-27 01:28:50,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:50,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718373502] [2020-10-27 01:28:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:50,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:50,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:50,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:28:50,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:50,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 01:28:50,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:28:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:50,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:50,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:50,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:50,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:50,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:50,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:50,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:28:50,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:50,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:50,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:50,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:50,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:50,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718373502] [2020-10-27 01:28:50,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:50,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:50,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833113361] [2020-10-27 01:28:50,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:50,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:50,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:50,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:50,954 INFO L87 Difference]: Start difference. First operand 650 states and 1008 transitions. Second operand 4 states. [2020-10-27 01:28:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:51,141 INFO L93 Difference]: Finished difference Result 1502 states and 2339 transitions. [2020-10-27 01:28:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:51,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 01:28:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:51,147 INFO L225 Difference]: With dead ends: 1502 [2020-10-27 01:28:51,147 INFO L226 Difference]: Without dead ends: 875 [2020-10-27 01:28:51,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:51,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2020-10-27 01:28:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 874. [2020-10-27 01:28:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-27 01:28:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1336 transitions. [2020-10-27 01:28:51,185 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1336 transitions. Word has length 25 [2020-10-27 01:28:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:51,185 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 1336 transitions. [2020-10-27 01:28:51,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:51,186 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1336 transitions. [2020-10-27 01:28:51,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:28:51,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:51,187 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] [2020-10-27 01:28:51,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:28:51,188 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:51,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1905442760, now seen corresponding path program 1 times [2020-10-27 01:28:51,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:51,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444307858] [2020-10-27 01:28:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:51,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:51,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:51,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:51,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:28:51,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:51,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-27 01:28:51,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:51,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:51,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:28:51,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:51,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:51,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:51,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:51,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:51,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:51,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:51,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:51,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:51,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:51,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:51,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:51,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:51,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444307858] [2020-10-27 01:28:51,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:51,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:51,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504681756] [2020-10-27 01:28:51,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:51,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:51,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:51,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:51,345 INFO L87 Difference]: Start difference. First operand 874 states and 1336 transitions. Second operand 4 states. [2020-10-27 01:28:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:51,570 INFO L93 Difference]: Finished difference Result 1310 states and 1995 transitions. [2020-10-27 01:28:51,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:51,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 01:28:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:51,575 INFO L225 Difference]: With dead ends: 1310 [2020-10-27 01:28:51,575 INFO L226 Difference]: Without dead ends: 891 [2020-10-27 01:28:51,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:51,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-10-27 01:28:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 890. [2020-10-27 01:28:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2020-10-27 01:28:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1336 transitions. [2020-10-27 01:28:51,613 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1336 transitions. Word has length 26 [2020-10-27 01:28:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:51,613 INFO L481 AbstractCegarLoop]: Abstraction has 890 states and 1336 transitions. [2020-10-27 01:28:51,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1336 transitions. [2020-10-27 01:28:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:28:51,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:51,615 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] [2020-10-27 01:28:51,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:28:51,615 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:51,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1378407286, now seen corresponding path program 1 times [2020-10-27 01:28:51,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:51,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969743563] [2020-10-27 01:28:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:51,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:51,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:51,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:28:51,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:51,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 01:28:51,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:28:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:28:51,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:51,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:51,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:51,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:51,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:51,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:51,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:51,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:51,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:51,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969743563] [2020-10-27 01:28:51,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:51,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:51,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629793913] [2020-10-27 01:28:51,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:51,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:51,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:51,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:51,728 INFO L87 Difference]: Start difference. First operand 890 states and 1336 transitions. Second operand 4 states. [2020-10-27 01:28:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:51,913 INFO L93 Difference]: Finished difference Result 1550 states and 2363 transitions. [2020-10-27 01:28:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:51,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 01:28:51,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:51,925 INFO L225 Difference]: With dead ends: 1550 [2020-10-27 01:28:51,925 INFO L226 Difference]: Without dead ends: 1547 [2020-10-27 01:28:51,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:51,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-10-27 01:28:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1290. [2020-10-27 01:28:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1290 states. [2020-10-27 01:28:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1880 transitions. [2020-10-27 01:28:51,983 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1880 transitions. Word has length 26 [2020-10-27 01:28:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:51,984 INFO L481 AbstractCegarLoop]: Abstraction has 1290 states and 1880 transitions. [2020-10-27 01:28:51,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1880 transitions. [2020-10-27 01:28:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:28:51,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:51,987 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] [2020-10-27 01:28:51,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:28:51,987 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:51,990 INFO L82 PathProgramCache]: Analyzing trace with hash 791601272, now seen corresponding path program 1 times [2020-10-27 01:28:51,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:51,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070564542] [2020-10-27 01:28:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:52,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:52,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:52,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:28:52,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:52,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 01:28:52,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:52,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:52,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:28:52,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:52,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:52,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:52,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:52,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:52,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:52,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:52,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:52,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:52,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:52,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:52,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:52,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:52,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070564542] [2020-10-27 01:28:52,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:52,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:52,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472044483] [2020-10-27 01:28:52,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:52,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:52,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:52,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:52,108 INFO L87 Difference]: Start difference. First operand 1290 states and 1880 transitions. Second operand 4 states. [2020-10-27 01:28:52,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:52,333 INFO L93 Difference]: Finished difference Result 2958 states and 4315 transitions. [2020-10-27 01:28:52,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:52,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 01:28:52,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:52,344 INFO L225 Difference]: With dead ends: 2958 [2020-10-27 01:28:52,344 INFO L226 Difference]: Without dead ends: 1707 [2020-10-27 01:28:52,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-10-27 01:28:52,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1706. [2020-10-27 01:28:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2020-10-27 01:28:52,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2440 transitions. [2020-10-27 01:28:52,417 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2440 transitions. Word has length 26 [2020-10-27 01:28:52,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:52,417 INFO L481 AbstractCegarLoop]: Abstraction has 1706 states and 2440 transitions. [2020-10-27 01:28:52,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:52,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2440 transitions. [2020-10-27 01:28:52,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:28:52,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:52,420 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] [2020-10-27 01:28:52,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:28:52,421 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:52,421 INFO L82 PathProgramCache]: Analyzing trace with hash -212375801, now seen corresponding path program 1 times [2020-10-27 01:28:52,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:52,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552523782] [2020-10-27 01:28:52,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:52,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:52,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:52,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:52,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:28:52,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:52,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-27 01:28:52,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:52,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:52,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:28:52,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:52,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:52,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:52,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:52,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:52,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:52,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:52,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:52,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:52,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:52,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:52,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:52,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:52,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552523782] [2020-10-27 01:28:52,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:52,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:52,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075879395] [2020-10-27 01:28:52,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:52,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:52,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:52,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:52,581 INFO L87 Difference]: Start difference. First operand 1706 states and 2440 transitions. Second operand 4 states. [2020-10-27 01:28:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:52,782 INFO L93 Difference]: Finished difference Result 2558 states and 3643 transitions. [2020-10-27 01:28:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:52,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 01:28:52,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:52,793 INFO L225 Difference]: With dead ends: 2558 [2020-10-27 01:28:52,793 INFO L226 Difference]: Without dead ends: 1739 [2020-10-27 01:28:52,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:52,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2020-10-27 01:28:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1738. [2020-10-27 01:28:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2020-10-27 01:28:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2440 transitions. [2020-10-27 01:28:52,906 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2440 transitions. Word has length 27 [2020-10-27 01:28:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:52,906 INFO L481 AbstractCegarLoop]: Abstraction has 1738 states and 2440 transitions. [2020-10-27 01:28:52,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:52,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2440 transitions. [2020-10-27 01:28:52,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:28:52,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:52,910 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] [2020-10-27 01:28:52,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:28:52,910 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:52,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1223493051, now seen corresponding path program 1 times [2020-10-27 01:28:52,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:52,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639023065] [2020-10-27 01:28:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:52,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:52,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:52,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:28:52,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:52,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 01:28:52,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:52,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:52,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 01:28:52,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:28:52,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:53,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:53,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:53,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:53,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:53,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:53,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:28:53,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:53,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:53,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:53,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:53,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:53,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639023065] [2020-10-27 01:28:53,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:53,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:53,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301921339] [2020-10-27 01:28:53,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:53,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:53,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:53,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:53,020 INFO L87 Difference]: Start difference. First operand 1738 states and 2440 transitions. Second operand 4 states. [2020-10-27 01:28:53,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:53,230 INFO L93 Difference]: Finished difference Result 2958 states and 4203 transitions. [2020-10-27 01:28:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:53,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 01:28:53,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:53,247 INFO L225 Difference]: With dead ends: 2958 [2020-10-27 01:28:53,247 INFO L226 Difference]: Without dead ends: 2955 [2020-10-27 01:28:53,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2020-10-27 01:28:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2570. [2020-10-27 01:28:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2570 states. [2020-10-27 01:28:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 3496 transitions. [2020-10-27 01:28:53,352 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 3496 transitions. Word has length 27 [2020-10-27 01:28:53,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:53,352 INFO L481 AbstractCegarLoop]: Abstraction has 2570 states and 3496 transitions. [2020-10-27 01:28:53,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:53,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 3496 transitions. [2020-10-27 01:28:53,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:28:53,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:53,358 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] [2020-10-27 01:28:53,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:28:53,358 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:53,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1810299065, now seen corresponding path program 1 times [2020-10-27 01:28:53,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:53,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909209136] [2020-10-27 01:28:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:53,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:53,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:53,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:28:53,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:53,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-27 01:28:53,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:53,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:53,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 01:28:53,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:53,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:53,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:53,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:53,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:53,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:53,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:53,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:28:53,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:53,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:53,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:53,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909209136] [2020-10-27 01:28:53,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:53,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:53,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913832846] [2020-10-27 01:28:53,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:53,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:53,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:53,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:53,514 INFO L87 Difference]: Start difference. First operand 2570 states and 3496 transitions. Second operand 4 states. [2020-10-27 01:28:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:53,763 INFO L93 Difference]: Finished difference Result 5838 states and 7915 transitions. [2020-10-27 01:28:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:53,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 01:28:53,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:53,780 INFO L225 Difference]: With dead ends: 5838 [2020-10-27 01:28:53,780 INFO L226 Difference]: Without dead ends: 3339 [2020-10-27 01:28:53,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2020-10-27 01:28:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3338. [2020-10-27 01:28:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-10-27 01:28:53,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4424 transitions. [2020-10-27 01:28:53,922 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4424 transitions. Word has length 27 [2020-10-27 01:28:53,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:53,922 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 4424 transitions. [2020-10-27 01:28:53,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4424 transitions. [2020-10-27 01:28:53,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:28:53,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:53,928 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] [2020-10-27 01:28:53,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:28:53,928 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:53,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash 733102947, now seen corresponding path program 1 times [2020-10-27 01:28:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:53,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057501598] [2020-10-27 01:28:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:53,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:53,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:54,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:54,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:28:54,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:54,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-27 01:28:54,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:54,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:54,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 01:28:54,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:54,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:54,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:54,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:54,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:54,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:54,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:54,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:28:54,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:54,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:54,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:54,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:54,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:54,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057501598] [2020-10-27 01:28:54,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:54,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:54,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019035970] [2020-10-27 01:28:54,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:54,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:54,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:54,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:54,113 INFO L87 Difference]: Start difference. First operand 3338 states and 4424 transitions. Second operand 4 states. [2020-10-27 01:28:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:54,360 INFO L93 Difference]: Finished difference Result 5006 states and 6603 transitions. [2020-10-27 01:28:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:54,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 01:28:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:54,377 INFO L225 Difference]: With dead ends: 5006 [2020-10-27 01:28:54,377 INFO L226 Difference]: Without dead ends: 3403 [2020-10-27 01:28:54,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2020-10-27 01:28:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3402. [2020-10-27 01:28:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3402 states. [2020-10-27 01:28:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 4424 transitions. [2020-10-27 01:28:54,528 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 4424 transitions. Word has length 28 [2020-10-27 01:28:54,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:54,529 INFO L481 AbstractCegarLoop]: Abstraction has 3402 states and 4424 transitions. [2020-10-27 01:28:54,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:54,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 4424 transitions. [2020-10-27 01:28:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:28:54,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:54,534 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] [2020-10-27 01:28:54,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:28:54,534 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:54,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:54,535 INFO L82 PathProgramCache]: Analyzing trace with hash -278014303, now seen corresponding path program 1 times [2020-10-27 01:28:54,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:54,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372479251] [2020-10-27 01:28:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:54,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:54,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:54,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:28:54,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:54,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 01:28:54,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 01:28:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:28:54,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:54,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:54,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:54,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:54,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:54,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:54,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:28:54,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:54,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:54,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372479251] [2020-10-27 01:28:54,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:54,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:54,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734260535] [2020-10-27 01:28:54,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:54,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:54,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:54,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:54,643 INFO L87 Difference]: Start difference. First operand 3402 states and 4424 transitions. Second operand 4 states. [2020-10-27 01:28:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:54,935 INFO L93 Difference]: Finished difference Result 5646 states and 7371 transitions. [2020-10-27 01:28:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:54,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 01:28:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:54,985 INFO L225 Difference]: With dead ends: 5646 [2020-10-27 01:28:54,986 INFO L226 Difference]: Without dead ends: 5643 [2020-10-27 01:28:54,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2020-10-27 01:28:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5130. [2020-10-27 01:28:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5130 states. [2020-10-27 01:28:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 6472 transitions. [2020-10-27 01:28:55,169 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 6472 transitions. Word has length 28 [2020-10-27 01:28:55,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:55,170 INFO L481 AbstractCegarLoop]: Abstraction has 5130 states and 6472 transitions. [2020-10-27 01:28:55,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 6472 transitions. [2020-10-27 01:28:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:28:55,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:55,180 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] [2020-10-27 01:28:55,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:28:55,180 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:55,181 INFO L82 PathProgramCache]: Analyzing trace with hash -864820317, now seen corresponding path program 1 times [2020-10-27 01:28:55,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:55,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483219926] [2020-10-27 01:28:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:55,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:55,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:55,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:28:55,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:55,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 01:28:55,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 01:28:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:55,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:55,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:55,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:55,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:55,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:55,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:55,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:28:55,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:55,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:55,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:55,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:55,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:55,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483219926] [2020-10-27 01:28:55,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:55,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:55,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124138552] [2020-10-27 01:28:55,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:55,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:55,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:55,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:55,288 INFO L87 Difference]: Start difference. First operand 5130 states and 6472 transitions. Second operand 4 states. [2020-10-27 01:28:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:55,629 INFO L93 Difference]: Finished difference Result 11534 states and 14411 transitions. [2020-10-27 01:28:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:55,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 01:28:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:55,645 INFO L225 Difference]: With dead ends: 11534 [2020-10-27 01:28:55,645 INFO L226 Difference]: Without dead ends: 6539 [2020-10-27 01:28:55,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2020-10-27 01:28:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6538. [2020-10-27 01:28:55,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6538 states. [2020-10-27 01:28:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6538 states to 6538 states and 7944 transitions. [2020-10-27 01:28:55,878 INFO L78 Accepts]: Start accepts. Automaton has 6538 states and 7944 transitions. Word has length 28 [2020-10-27 01:28:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:55,878 INFO L481 AbstractCegarLoop]: Abstraction has 6538 states and 7944 transitions. [2020-10-27 01:28:55,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 6538 states and 7944 transitions. [2020-10-27 01:28:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:28:55,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:55,888 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] [2020-10-27 01:28:55,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:28:55,888 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:55,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:55,888 INFO L82 PathProgramCache]: Analyzing trace with hash -21816366, now seen corresponding path program 1 times [2020-10-27 01:28:55,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:55,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890902696] [2020-10-27 01:28:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:55,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:55,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:56,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:56,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:28:56,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:56,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 01:28:56,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:56,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:56,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 01:28:56,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:56,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:56,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:56,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:56,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:56,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:56,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:56,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:28:56,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:56,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:56,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:56,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:56,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:56,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890902696] [2020-10-27 01:28:56,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:56,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:56,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178905708] [2020-10-27 01:28:56,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:56,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:56,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:56,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:56,094 INFO L87 Difference]: Start difference. First operand 6538 states and 7944 transitions. Second operand 4 states. [2020-10-27 01:28:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:56,387 INFO L93 Difference]: Finished difference Result 9806 states and 11851 transitions. [2020-10-27 01:28:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:56,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 01:28:56,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:56,403 INFO L225 Difference]: With dead ends: 9806 [2020-10-27 01:28:56,403 INFO L226 Difference]: Without dead ends: 6667 [2020-10-27 01:28:56,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:56,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2020-10-27 01:28:56,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6666. [2020-10-27 01:28:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6666 states. [2020-10-27 01:28:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 7944 transitions. [2020-10-27 01:28:56,630 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 7944 transitions. Word has length 29 [2020-10-27 01:28:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:56,630 INFO L481 AbstractCegarLoop]: Abstraction has 6666 states and 7944 transitions. [2020-10-27 01:28:56,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 7944 transitions. [2020-10-27 01:28:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:28:56,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:56,640 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] [2020-10-27 01:28:56,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:28:56,640 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:56,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1032933616, now seen corresponding path program 1 times [2020-10-27 01:28:56,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:56,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961874674] [2020-10-27 01:28:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:56,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:56,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:56,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:28:56,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:56,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 01:28:56,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:56,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:56,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:28:56,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:28:56,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:56,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:56,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:56,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:56,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:56,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:56,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 01:28:56,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:56,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:56,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:56,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:56,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:56,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961874674] [2020-10-27 01:28:56,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:56,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:56,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680678104] [2020-10-27 01:28:56,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:56,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:56,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:56,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:56,765 INFO L87 Difference]: Start difference. First operand 6666 states and 7944 transitions. Second operand 4 states. [2020-10-27 01:28:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:57,135 INFO L93 Difference]: Finished difference Result 10765 states and 12682 transitions. [2020-10-27 01:28:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:57,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 01:28:57,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:57,162 INFO L225 Difference]: With dead ends: 10765 [2020-10-27 01:28:57,162 INFO L226 Difference]: Without dead ends: 10762 [2020-10-27 01:28:57,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2020-10-27 01:28:57,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 10250. [2020-10-27 01:28:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10250 states. [2020-10-27 01:28:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10250 states to 10250 states and 11912 transitions. [2020-10-27 01:28:57,503 INFO L78 Accepts]: Start accepts. Automaton has 10250 states and 11912 transitions. Word has length 29 [2020-10-27 01:28:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:57,503 INFO L481 AbstractCegarLoop]: Abstraction has 10250 states and 11912 transitions. [2020-10-27 01:28:57,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 10250 states and 11912 transitions. [2020-10-27 01:28:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:28:57,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:57,522 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] [2020-10-27 01:28:57,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:28:57,522 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:57,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:57,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1619739630, now seen corresponding path program 1 times [2020-10-27 01:28:57,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:57,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430829702] [2020-10-27 01:28:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:57,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:57,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:57,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:28:57,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:57,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 01:28:57,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:57,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:57,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:28:57,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:28:57,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:57,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:57,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:57,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:57,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:57,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:57,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:57,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:57,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:57,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:57,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:57,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:57,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430829702] [2020-10-27 01:28:57,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:57,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:57,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609135255] [2020-10-27 01:28:57,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:57,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:57,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:57,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:57,626 INFO L87 Difference]: Start difference. First operand 10250 states and 11912 transitions. Second operand 4 states. [2020-10-27 01:28:58,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:58,004 INFO L93 Difference]: Finished difference Result 22794 states and 25992 transitions. [2020-10-27 01:28:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:58,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 01:28:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:58,005 INFO L225 Difference]: With dead ends: 22794 [2020-10-27 01:28:58,005 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 01:28:58,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:58,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 01:28:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 01:28:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 01:28:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 01:28:58,096 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-27 01:28:58,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:58,097 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 01:28:58,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 01:28:58,097 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 01:28:58,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:28:58,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 01:29:16,139 WARN L193 SmtUtils]: Spent 18.00 s on a formula simplification. DAG size of input: 2122 DAG size of output: 32 [2020-10-27 01:29:16,208 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 01:29:16,209 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 01:29:16,209 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 01:29:16,209 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 01:29:16,209 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:29:16,209 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-27 01:29:16,209 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:29:16,210 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:29:16,210 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 01:29:16,210 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 01:29:16,210 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:29:16,210 INFO L274 CegarLoopResult]: For program point L126-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,210 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 151) no Hoare annotation was computed. [2020-10-27 01:29:16,210 INFO L274 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-10-27 01:29:16,210 INFO L274 CegarLoopResult]: For program point L127(line 127) no Hoare annotation was computed. [2020-10-27 01:29:16,211 INFO L274 CegarLoopResult]: For program point L111-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,211 INFO L274 CegarLoopResult]: For program point L136-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,212 INFO L274 CegarLoopResult]: For program point L95-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,212 INFO L274 CegarLoopResult]: For program point L87-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,212 INFO L274 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-10-27 01:29:16,212 INFO L274 CegarLoopResult]: For program point L79-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,212 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 151) no Hoare annotation was computed. [2020-10-27 01:29:16,212 INFO L274 CegarLoopResult]: For program point L137(line 137) no Hoare annotation was computed. [2020-10-27 01:29:16,212 INFO L274 CegarLoopResult]: For program point L71-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,212 INFO L274 CegarLoopResult]: For program point L63(lines 63 65) no Hoare annotation was computed. [2020-10-27 01:29:16,212 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 151) the Hoare annotation is: true [2020-10-27 01:29:16,212 INFO L274 CegarLoopResult]: For program point L63-2(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,213 INFO L274 CegarLoopResult]: For program point L121-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,213 INFO L274 CegarLoopResult]: For program point L122(line 122) no Hoare annotation was computed. [2020-10-27 01:29:16,213 INFO L277 CegarLoopResult]: At program point L147(lines 7 151) the Hoare annotation is: true [2020-10-27 01:29:16,213 INFO L274 CegarLoopResult]: For program point L106-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,213 INFO L274 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-10-27 01:29:16,213 INFO L274 CegarLoopResult]: For program point L131-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,213 INFO L274 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-10-27 01:29:16,214 INFO L274 CegarLoopResult]: For program point L132(line 132) no Hoare annotation was computed. [2020-10-27 01:29:16,214 INFO L274 CegarLoopResult]: For program point L91-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,214 INFO L274 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-10-27 01:29:16,214 INFO L274 CegarLoopResult]: For program point L116-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,214 INFO L274 CegarLoopResult]: For program point L83-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,214 INFO L277 CegarLoopResult]: At program point L141-1(lines 38 146) the Hoare annotation is: true [2020-10-27 01:29:16,214 INFO L274 CegarLoopResult]: For program point L75-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,214 INFO L274 CegarLoopResult]: For program point L67-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,214 INFO L274 CegarLoopResult]: For program point L117(line 117) no Hoare annotation was computed. [2020-10-27 01:29:16,214 INFO L274 CegarLoopResult]: For program point L142(line 142) no Hoare annotation was computed. [2020-10-27 01:29:16,214 INFO L270 CegarLoopResult]: At program point L142-1(lines 7 151) the Hoare annotation is: false [2020-10-27 01:29:16,215 INFO L274 CegarLoopResult]: For program point L101-1(lines 38 146) no Hoare annotation was computed. [2020-10-27 01:29:16,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:29:16 BoogieIcfgContainer [2020-10-27 01:29:16,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:29:16,246 INFO L168 Benchmark]: Toolchain (without parser) took 32362.46 ms. Allocated memory was 151.0 MB in the beginning and 779.1 MB in the end (delta: 628.1 MB). Free memory was 132.9 MB in the beginning and 423.8 MB in the end (delta: -290.9 MB). Peak memory consumption was 513.8 MB. Max. memory is 8.0 GB. [2020-10-27 01:29:16,247 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory was 124.3 MB in the beginning and 124.2 MB in the end (delta: 118.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:29:16,248 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.55 ms. Allocated memory is still 151.0 MB. Free memory was 132.3 MB in the beginning and 122.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:29:16,249 INFO L168 Benchmark]: Boogie Preprocessor took 100.38 ms. Allocated memory is still 151.0 MB. Free memory was 122.3 MB in the beginning and 134.5 MB in the end (delta: -12.2 MB). Peak memory consumption was 4.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:29:16,253 INFO L168 Benchmark]: RCFGBuilder took 653.35 ms. Allocated memory is still 151.0 MB. Free memory was 134.5 MB in the beginning and 114.7 MB in the end (delta: 19.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-10-27 01:29:16,257 INFO L168 Benchmark]: TraceAbstraction took 31302.00 ms. Allocated memory was 151.0 MB in the beginning and 779.1 MB in the end (delta: 628.1 MB). Free memory was 114.6 MB in the beginning and 423.8 MB in the end (delta: -309.2 MB). Peak memory consumption was 497.3 MB. Max. memory is 8.0 GB. [2020-10-27 01:29:16,260 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory was 124.3 MB in the beginning and 124.2 MB in the end (delta: 118.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 291.55 ms. Allocated memory is still 151.0 MB. Free memory was 132.3 MB in the beginning and 122.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 100.38 ms. Allocated memory is still 151.0 MB. Free memory was 122.3 MB in the beginning and 134.5 MB in the end (delta: -12.2 MB). Peak memory consumption was 4.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 653.35 ms. Allocated memory is still 151.0 MB. Free memory was 134.5 MB in the beginning and 114.7 MB in the end (delta: 19.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 31302.00 ms. Allocated memory was 151.0 MB in the beginning and 779.1 MB in the end (delta: 628.1 MB). Free memory was 114.6 MB in the beginning and 423.8 MB in the end (delta: -309.2 MB). Peak memory consumption was 497.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.0s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 18.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1967 SDtfs, 2829 SDslu, 194 SDs, 0 SdLazy, 1415 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10250occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 25 MinimizatonAttempts, 2049 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 32 PreInvPairs, 547 NumberOfFragments, 38 HoareAnnotationTreeSize, 32 FomulaSimplifications, 13725542 FormulaSimplificationTreeSizeReduction, 18.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 631 NumberOfCodeBlocks, 631 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 606 ConstructedInterpolants, 0 QuantifiedInterpolants, 45934 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...