/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/array-lopstr16/sum_multi_array.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:49:53,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:49:53,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:49:53,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:49:53,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:49:53,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:49:53,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:49:53,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:49:53,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:49:53,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:49:53,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:49:53,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:49:53,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:49:53,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:49:53,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:49:53,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:49:53,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:49:53,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:49:53,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:49:53,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:49:53,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:49:53,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:49:53,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:49:53,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:49:53,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:49:53,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:49:53,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:49:53,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:49:53,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:49:53,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:49:53,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:49:53,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:49:53,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:49:53,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:49:53,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:49:53,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:49:53,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:49:53,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:49:53,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:49:53,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:49:53,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:49:53,215 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 [2020-10-26 19:49:53,263 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:49:53,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:49:53,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:49:53,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:49:53,267 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:49:53,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:49:53,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:49:53,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:49:53,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:49:53,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:49:53,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:49:53,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:49:53,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:49:53,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:49:53,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:49:53,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:49:53,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:49:53,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:49:53,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:49:53,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:49:53,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:49:53,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:49:53,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:49:53,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:49:53,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:49:53,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:49:53,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:49:53,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:49:53,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:49:53,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:49:53,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:49:53,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:49:53,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:49:53,737 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:49:53,738 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:49:53,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/sum_multi_array.i [2020-10-26 19:49:53,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36631a054/14ff69a088a74c6abafc68537e88f261/FLAG158424c4d [2020-10-26 19:49:54,543 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:49:54,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/sum_multi_array.i [2020-10-26 19:49:54,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36631a054/14ff69a088a74c6abafc68537e88f261/FLAG158424c4d [2020-10-26 19:49:54,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36631a054/14ff69a088a74c6abafc68537e88f261 [2020-10-26 19:49:54,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:49:54,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:49:54,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:49:54,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:49:54,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:49:54,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:49:54" (1/1) ... [2020-10-26 19:49:54,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5f6148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:49:54, skipping insertion in model container [2020-10-26 19:49:54,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:49:54" (1/1) ... [2020-10-26 19:49:54,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:49:54,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:49:55,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:50:12,898 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:50:12,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:50:12,983 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:50:12,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:50:12 WrapperNode [2020-10-26 19:50:12,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:50:12,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:50:12,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:50:12,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:50:13,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:50:12" (1/1) ... [2020-10-26 19:50:13,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:50:12" (1/1) ... [2020-10-26 19:50:13,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:50:12" (1/1) ... [2020-10-26 19:50:13,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:50:12" (1/1) ... [2020-10-26 19:50:13,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:50:12" (1/1) ... [2020-10-26 19:50:13,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:50:12" (1/1) ... [2020-10-26 19:50:13,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:50:12" (1/1) ... [2020-10-26 19:50:13,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:50:13,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:50:13,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:50:13,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:50:13,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:50:12" (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 [2020-10-26 19:50:13,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:50:13,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:50:13,233 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:50:13,233 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:50:13,233 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:50:13,233 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:50:13,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:50:13,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:50:13,243 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:50:13,243 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:50:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:50:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:50:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:50:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:50:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:50:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:50:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:50:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:50:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:50:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:50:14,308 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:50:14,308 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:50:14,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:50:14 BoogieIcfgContainer [2020-10-26 19:50:14,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:50:14,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:50:14,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:50:14,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:50:14,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:49:54" (1/3) ... [2020-10-26 19:50:14,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e3624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:50:14, skipping insertion in model container [2020-10-26 19:50:14,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:50:12" (2/3) ... [2020-10-26 19:50:14,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e3624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:50:14, skipping insertion in model container [2020-10-26 19:50:14,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:50:14" (3/3) ... [2020-10-26 19:50:14,339 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_multi_array.i [2020-10-26 19:50:14,361 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:50:14,368 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:50:14,382 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:50:14,426 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:50:14,426 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:50:14,426 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:50:14,427 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:50:14,427 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:50:14,427 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:50:14,427 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:50:14,427 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:50:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-26 19:50:14,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:50:14,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:14,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:14,462 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:14,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1906025394, now seen corresponding path program 1 times [2020-10-26 19:50:14,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:14,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032752330] [2020-10-26 19:50:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:14,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:14,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:15,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:15,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:15,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:50:15,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:50:15,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1132 [2020-10-26 19:50:15,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:15,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:50:15,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:50:15,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:50:15,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:50:16,679 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-26 19:50:16,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:16,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:16,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:16,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:16,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:16,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 19:50:16,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:16,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:50:16,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:50:16,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:50:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:16,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032752330] [2020-10-26 19:50:16,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:50:16,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 19:50:16,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737672844] [2020-10-26 19:50:16,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:50:16,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:16,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:50:16,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:50:16,919 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 8 states. [2020-10-26 19:50:17,455 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-26 19:50:18,092 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 19:50:18,270 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 19:50:18,512 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 19:50:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:19,024 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2020-10-26 19:50:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:50:19,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-26 19:50:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:19,034 INFO L225 Difference]: With dead ends: 71 [2020-10-26 19:50:19,034 INFO L226 Difference]: Without dead ends: 25 [2020-10-26 19:50:19,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:50:19,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-26 19:50:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-26 19:50:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:50:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-26 19:50:19,115 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-10-26 19:50:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:19,116 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-26 19:50:19,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:50:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-26 19:50:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:50:19,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:19,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:19,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:50:19,120 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:19,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1825545696, now seen corresponding path program 1 times [2020-10-26 19:50:19,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:19,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063459467] [2020-10-26 19:50:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:19,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:19,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:19,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:21,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:21,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:50:21,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:50:21,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2038 [2020-10-26 19:50:21,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:21,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:50:21,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:50:21,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:50:21,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:50:22,076 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-10-26 19:50:22,328 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-26 19:50:22,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:22,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:22,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:22,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:22,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:22,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 19:50:22,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:22,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:50:22,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:22,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:50:22,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:22,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063459467] [2020-10-26 19:50:22,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:22,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:50:22,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574572786] [2020-10-26 19:50:22,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:50:22,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:22,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:50:22,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:50:22,914 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-10-26 19:50:23,478 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-26 19:50:24,002 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-26 19:50:24,222 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-26 19:50:25,096 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-26 19:50:25,316 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 19:50:25,597 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-26 19:50:26,088 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-26 19:50:26,256 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 19:50:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:26,369 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-26 19:50:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:50:26,372 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-26 19:50:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:26,373 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:50:26,373 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:50:26,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:50:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:50:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2020-10-26 19:50:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:50:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-26 19:50:26,418 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 19 [2020-10-26 19:50:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:26,420 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-26 19:50:26,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:50:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-26 19:50:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:50:26,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:26,423 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:26,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:50:26,424 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:26,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1451191554, now seen corresponding path program 2 times [2020-10-26 19:50:26,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:26,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753042193] [2020-10-26 19:50:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:26,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:26,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:26,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:28,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:28,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:50:28,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:50:28,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1617 [2020-10-26 19:50:28,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:50:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:50:28,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:50:28,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:29,344 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-10-26 19:50:29,644 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-26 19:50:29,847 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-26 19:50:30,335 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-10-26 19:50:35,296 WARN L193 SmtUtils]: Spent 4.90 s on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-10-26 19:50:35,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:35,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:35,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:35,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:35,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:35,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 19:50:35,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:35,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:50:35,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:35,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:50:35,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:35,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753042193] [2020-10-26 19:50:35,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:35,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:50:35,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380382954] [2020-10-26 19:50:35,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:50:35,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:35,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:50:35,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:50:35,649 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 13 states. [2020-10-26 19:50:35,886 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-26 19:50:36,346 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2020-10-26 19:50:36,752 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2020-10-26 19:50:37,854 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-26 19:50:43,033 WARN L193 SmtUtils]: Spent 4.95 s on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2020-10-26 19:50:43,847 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 59 [2020-10-26 19:50:44,370 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-26 19:50:49,473 WARN L193 SmtUtils]: Spent 4.98 s on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2020-10-26 19:50:50,047 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-26 19:50:55,459 WARN L193 SmtUtils]: Spent 4.60 s on a formula simplification that was a NOOP. DAG size: 112 [2020-10-26 19:51:00,267 WARN L193 SmtUtils]: Spent 4.65 s on a formula simplification that was a NOOP. DAG size: 115 [2020-10-26 19:51:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:00,772 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2020-10-26 19:51:00,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:51:00,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-26 19:51:00,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:00,779 INFO L225 Difference]: With dead ends: 85 [2020-10-26 19:51:00,780 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:51:00,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:51:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:51:00,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2020-10-26 19:51:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:51:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-26 19:51:00,809 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 21 [2020-10-26 19:51:00,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:00,809 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-26 19:51:00,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:51:00,810 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-26 19:51:00,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:51:00,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:00,811 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:00,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:51:00,812 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:00,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:00,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1820853340, now seen corresponding path program 3 times [2020-10-26 19:51:00,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:00,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443490557] [2020-10-26 19:51:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:00,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:00,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:00,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:02,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:02,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:51:02,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:51:02,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1598 [2020-10-26 19:51:02,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:02,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:51:02,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:51:02,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:51:02,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:03,296 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-26 19:51:03,652 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-26 19:51:04,760 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-10-26 19:51:06,085 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2020-10-26 19:51:08,269 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 141 DAG size of output: 101 [2020-10-26 19:51:14,442 WARN L193 SmtUtils]: Spent 5.71 s on a formula simplification. DAG size of input: 123 DAG size of output: 95 [2020-10-26 19:51:14,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:14,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:14,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:14,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:14,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:14,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 19:51:14,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:14,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:51:14,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:14,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:51:14,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:14,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443490557] [2020-10-26 19:51:14,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:14,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:51:14,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831018222] [2020-10-26 19:51:14,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:51:14,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:14,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:51:14,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:51:14,922 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 15 states. [2020-10-26 19:51:15,324 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 19:51:15,831 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 66 [2020-10-26 19:51:17,586 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 87 [2020-10-26 19:51:19,444 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 120 DAG size of output: 94 [2020-10-26 19:51:22,710 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 120 DAG size of output: 114 [2020-10-26 19:51:27,555 WARN L193 SmtUtils]: Spent 3.97 s on a formula simplification. DAG size of input: 127 DAG size of output: 121 [2020-10-26 19:51:30,502 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 127 DAG size of output: 101 [2020-10-26 19:51:32,585 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 137 [2020-10-26 19:51:38,855 WARN L193 SmtUtils]: Spent 5.62 s on a formula simplification. DAG size of input: 134 DAG size of output: 128 [2020-10-26 19:51:41,233 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 139 [2020-10-26 19:51:50,092 WARN L193 SmtUtils]: Spent 5.19 s on a formula simplification that was a NOOP. DAG size: 134 [2020-10-26 19:51:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:52,317 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-26 19:51:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:51:52,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-26 19:51:52,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:52,322 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:51:52,323 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:51:52,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:51:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:51:52,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 44. [2020-10-26 19:51:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:51:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-26 19:51:52,341 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 23 [2020-10-26 19:51:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:52,341 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-26 19:51:52,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:51:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-26 19:51:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:51:52,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:52,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:52,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:51:52,343 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:52,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:52,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1873587236, now seen corresponding path program 1 times [2020-10-26 19:51:52,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:52,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095656119] [2020-10-26 19:51:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:52,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:52,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:52,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:52,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:54,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:54,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:57,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:57,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:51:57,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:51:57,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:51:57,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:57,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:51:57,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:51:57,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:51:57,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:00,063 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-10-26 19:52:00,257 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2020-10-26 19:52:01,068 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 58 [2020-10-26 19:52:02,262 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 204 DAG size of output: 72 [2020-10-26 19:52:07,363 WARN L193 SmtUtils]: Spent 4.89 s on a formula simplification. DAG size of input: 392 DAG size of output: 106 [2020-10-26 19:52:23,363 WARN L193 SmtUtils]: Spent 15.41 s on a formula simplification. DAG size of input: 1031 DAG size of output: 90 [2020-10-26 19:52:24,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:24,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:24,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:24,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:24,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:24,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 19:52:24,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:52:24,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:52:24,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095656119] [2020-10-26 19:52:24,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:24,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:52:24,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168510888] [2020-10-26 19:52:24,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:52:24,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:24,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:52:24,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:52:24,922 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 12 states. [2020-10-26 19:52:25,162 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 19:52:25,320 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-26 19:52:27,172 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-26 19:52:28,334 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 140 [2020-10-26 19:52:29,672 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 143 [2020-10-26 19:52:30,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:30,194 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-26 19:52:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:52:30,196 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-26 19:52:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:30,197 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:52:30,197 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:52:30,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:52:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:52:30,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-26 19:52:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:52:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-26 19:52:30,227 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 23 [2020-10-26 19:52:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:30,227 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-26 19:52:30,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:52:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-26 19:52:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:52:30,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:30,229 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:30,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:52:30,229 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:30,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1955031494, now seen corresponding path program 4 times [2020-10-26 19:52:30,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:30,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894147756] [2020-10-26 19:52:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:30,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:31,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:52:31,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:31,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-26 19:52:31,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:31,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:52:31,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:52:31,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:52:31,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0