/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:30:32,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:30:32,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:30:32,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:30:32,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:30:32,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:30:32,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:30:32,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:30:32,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:30:32,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:30:32,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:30:32,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:30:32,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:30:32,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:30:32,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:30:32,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:30:32,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:30:32,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:30:32,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:30:32,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:30:32,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:30:32,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:30:32,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:30:32,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:30:32,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:30:32,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:30:32,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:30:32,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:30:32,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:30:32,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:30:32,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:30:32,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:30:32,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:30:32,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:30:32,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:30:32,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:30:32,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:30:32,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:30:32,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:30:32,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:30:32,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:30:32,309 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 14:30:32,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:30:32,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:30:32,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:30:32,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:30:32,369 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:30:32,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:30:32,370 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:30:32,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:30:32,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:30:32,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:30:32,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:30:32,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:30:32,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:30:32,373 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:30:32,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:30:32,373 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:30:32,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:30:32,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:30:32,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:30:32,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:30:32,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:30:32,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:30:32,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:30:32,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:30:32,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:30:32,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:30:32,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:30:32,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:30:32,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:30:32,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:30:32,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:30:32,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:30:32,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:30:32,830 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:30:32,830 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:30:32,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-1.i [2020-10-27 14:30:32,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a2bdcad5/8e20e37d204349e38562154ff7179e7c/FLAGb9b81c014 [2020-10-27 14:30:33,585 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:30:33,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_running-1.i [2020-10-27 14:30:33,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a2bdcad5/8e20e37d204349e38562154ff7179e7c/FLAGb9b81c014 [2020-10-27 14:30:33,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a2bdcad5/8e20e37d204349e38562154ff7179e7c [2020-10-27 14:30:33,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:30:33,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:30:33,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:30:33,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:30:33,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:30:33,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:30:33" (1/1) ... [2020-10-27 14:30:33,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cdbf4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:33, skipping insertion in model container [2020-10-27 14:30:33,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:30:33" (1/1) ... [2020-10-27 14:30:33,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:30:33,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:30:34,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:30:34,141 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:30:34,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:30:34,197 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:30:34,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34 WrapperNode [2020-10-27 14:30:34,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:30:34,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:30:34,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:30:34,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:30:34,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:30:34,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:30:34,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:30:34,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:30:34,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (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 14:30:34,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:30:34,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:30:34,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:30:34,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:30:34,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:30:34,321 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:30:34,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:30:34,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:30:34,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:30:34,321 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:30:34,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:30:34,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:30:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:30:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:30:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:30:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:30:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:30:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:30:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:30:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:30:34,880 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:30:34,880 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:30:34,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:30:34 BoogieIcfgContainer [2020-10-27 14:30:34,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:30:34,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:30:34,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:30:34,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:30:34,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:30:33" (1/3) ... [2020-10-27 14:30:34,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ff28cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:30:34, skipping insertion in model container [2020-10-27 14:30:34,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (2/3) ... [2020-10-27 14:30:34,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ff28cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:30:34, skipping insertion in model container [2020-10-27 14:30:34,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:30:34" (3/3) ... [2020-10-27 14:30:34,891 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2020-10-27 14:30:34,904 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:30:34,909 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:30:34,922 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:30:34,950 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:30:34,950 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:30:34,950 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:30:34,950 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:30:34,950 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:30:34,951 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:30:34,951 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:30:34,951 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:30:34,968 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 14:30:34,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:30:34,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:34,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:34,975 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:34,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1112199025, now seen corresponding path program 1 times [2020-10-27 14:30:34,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:34,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882971600] [2020-10-27 14:30:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:35,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:35,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:30:35,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:35,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-27 14:30:35,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:35,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:35,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:30:35,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:35,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:30:35,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:35,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:35,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:35,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:35,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 14:30:35,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:35,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:30:35,758 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 14:30:35,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882971600] [2020-10-27 14:30:35,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:35,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:30:35,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209647459] [2020-10-27 14:30:35,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:30:35,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:35,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:30:35,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:30:35,793 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-27 14:30:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:35,914 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2020-10-27 14:30:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:30:35,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 14:30:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:35,923 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:30:35,924 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 14:30:35,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:30:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 14:30:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 14:30:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 14:30:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-27 14:30:35,969 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-10-27 14:30:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:35,969 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-27 14:30:35,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:30:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-27 14:30:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:30:35,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:35,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:35,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:30:35,971 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:35,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1368569504, now seen corresponding path program 1 times [2020-10-27 14:30:35,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:35,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077751199] [2020-10-27 14:30:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:35,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:36,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:30:36,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:36,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-27 14:30:36,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:36,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:30:36,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:30:36,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:30:36,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:30:36,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:36,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:36,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:36,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:36,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:30:36,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:36,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:36,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:36,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:36,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:36,513 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 14:30:36,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077751199] [2020-10-27 14:30:36,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:36,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:30:36,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869375180] [2020-10-27 14:30:36,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:30:36,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:36,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:30:36,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:36,529 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 6 states. [2020-10-27 14:30:36,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:36,743 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-27 14:30:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:30:36,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 14:30:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:36,745 INFO L225 Difference]: With dead ends: 41 [2020-10-27 14:30:36,745 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 14:30:36,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:30:36,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 14:30:36,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 14:30:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 14:30:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2020-10-27 14:30:36,756 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 17 [2020-10-27 14:30:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:36,756 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2020-10-27 14:30:36,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:30:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2020-10-27 14:30:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:30:36,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:36,758 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 14:30:36,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:30:36,758 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:36,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:36,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1872127637, now seen corresponding path program 1 times [2020-10-27 14:30:36,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:36,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001850692] [2020-10-27 14:30:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:36,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:37,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:30:37,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:37,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-27 14:30:37,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:37,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:30:37,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:30:37,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:30:37,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:37,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:37,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:37,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:37,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:37,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:30:37,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:37,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:37,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:37,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:37,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:37,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001850692] [2020-10-27 14:30:37,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:37,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:30:37,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213407034] [2020-10-27 14:30:37,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:30:37,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:37,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:30:37,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:37,870 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 6 states. [2020-10-27 14:30:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:37,992 INFO L93 Difference]: Finished difference Result 67 states and 94 transitions. [2020-10-27 14:30:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:30:37,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 14:30:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:37,995 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:30:37,995 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:30:37,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:30:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-27 14:30:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:30:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2020-10-27 14:30:38,006 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 24 [2020-10-27 14:30:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:38,006 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2020-10-27 14:30:38,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:30:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2020-10-27 14:30:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:30:38,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:38,008 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 14:30:38,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:30:38,008 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:38,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:38,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1585096277, now seen corresponding path program 1 times [2020-10-27 14:30:38,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:38,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852463545] [2020-10-27 14:30:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:38,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:38,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:38,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:38,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:38,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:30:38,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:38,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 14:30:38,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:38,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:30:38,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:30:38,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:30:38,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:38,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:38,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:38,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:38,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:38,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:38,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:30:38,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:38,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:38,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:38,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:38,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:38,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852463545] [2020-10-27 14:30:38,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:38,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:30:38,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064616675] [2020-10-27 14:30:38,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:30:38,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:38,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:30:38,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:30:38,283 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 5 states. [2020-10-27 14:30:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:38,401 INFO L93 Difference]: Finished difference Result 123 states and 170 transitions. [2020-10-27 14:30:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:30:38,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-27 14:30:38,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:38,403 INFO L225 Difference]: With dead ends: 123 [2020-10-27 14:30:38,403 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 14:30:38,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:30:38,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 14:30:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2020-10-27 14:30:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:30:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2020-10-27 14:30:38,420 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 24 [2020-10-27 14:30:38,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:38,420 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2020-10-27 14:30:38,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:30:38,420 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2020-10-27 14:30:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:30:38,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:38,422 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:38,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:30:38,422 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:38,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:38,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1898177412, now seen corresponding path program 1 times [2020-10-27 14:30:38,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:38,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990758227] [2020-10-27 14:30:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:38,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:38,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:38,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:38,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:38,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:39,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:39,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:39,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:39,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:40,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:40,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:43,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:30:43,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:30:43,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:30:43,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:43,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:30:43,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:30:43,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:30:43,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:43,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:43,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:43,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:43,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:43,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:43,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:43,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:43,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:30:43,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990758227] [2020-10-27 14:30:43,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:43,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:30:43,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159040966] [2020-10-27 14:30:43,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:30:43,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:43,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:30:43,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:43,521 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 6 states. [2020-10-27 14:30:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:43,655 INFO L93 Difference]: Finished difference Result 166 states and 228 transitions. [2020-10-27 14:30:43,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:30:43,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-27 14:30:43,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:43,657 INFO L225 Difference]: With dead ends: 166 [2020-10-27 14:30:43,657 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:30:43,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:30:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 88. [2020-10-27 14:30:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 14:30:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 118 transitions. [2020-10-27 14:30:43,669 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 118 transitions. Word has length 41 [2020-10-27 14:30:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:43,670 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 118 transitions. [2020-10-27 14:30:43,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:30:43,670 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 118 transitions. [2020-10-27 14:30:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:30:43,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:43,673 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:43,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:30:43,673 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:43,674 INFO L82 PathProgramCache]: Analyzing trace with hash -319031113, now seen corresponding path program 2 times [2020-10-27 14:30:43,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:43,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245220718] [2020-10-27 14:30:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:43,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:48,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:48,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:30:48,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:30:48,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:30:48,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:48,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:30:48,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:30:48,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:30:48,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:30:48,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:48,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:48,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:48,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:48,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:48,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:30:48,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:48,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:48,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:48,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:48,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:30:48,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245220718] [2020-10-27 14:30:48,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:48,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:30:48,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251114660] [2020-10-27 14:30:48,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:30:48,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:48,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:30:48,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:30:48,948 INFO L87 Difference]: Start difference. First operand 88 states and 118 transitions. Second operand 11 states. [2020-10-27 14:30:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:49,654 INFO L93 Difference]: Finished difference Result 240 states and 329 transitions. [2020-10-27 14:30:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:30:49,655 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-27 14:30:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:49,657 INFO L225 Difference]: With dead ends: 240 [2020-10-27 14:30:49,657 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 14:30:49,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:30:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 14:30:49,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 135. [2020-10-27 14:30:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 14:30:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 176 transitions. [2020-10-27 14:30:49,698 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 176 transitions. Word has length 53 [2020-10-27 14:30:49,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:49,698 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 176 transitions. [2020-10-27 14:30:49,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:30:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 176 transitions. [2020-10-27 14:30:49,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:30:49,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:49,702 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:49,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:30:49,702 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:49,705 INFO L82 PathProgramCache]: Analyzing trace with hash -60865675, now seen corresponding path program 1 times [2020-10-27 14:30:49,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:49,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550357034] [2020-10-27 14:30:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:49,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:49,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:49,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:49,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:51,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:52,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:52,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:52,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:53,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:54,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:54,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:30:54,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:30:54,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:30:54,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:54,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:30:54,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:30:54,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:30:54,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:54,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:54,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:54,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:54,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:54,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:54,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:54,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:54,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 14:30:54,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550357034] [2020-10-27 14:30:54,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:54,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:30:54,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268238823] [2020-10-27 14:30:54,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:30:54,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:54,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:30:54,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:54,821 INFO L87 Difference]: Start difference. First operand 135 states and 176 transitions. Second operand 7 states. [2020-10-27 14:30:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:55,020 INFO L93 Difference]: Finished difference Result 316 states and 420 transitions. [2020-10-27 14:30:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:30:55,020 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-27 14:30:55,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:55,022 INFO L225 Difference]: With dead ends: 316 [2020-10-27 14:30:55,022 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 14:30:55,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:55,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 14:30:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 164. [2020-10-27 14:30:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 14:30:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 214 transitions. [2020-10-27 14:30:55,040 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 214 transitions. Word has length 53 [2020-10-27 14:30:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:55,040 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 214 transitions. [2020-10-27 14:30:55,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:30:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 214 transitions. [2020-10-27 14:30:55,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:30:55,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:55,043 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:55,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:30:55,044 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:55,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1301717274, now seen corresponding path program 2 times [2020-10-27 14:30:55,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:55,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335257640] [2020-10-27 14:30:55,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:55,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:55,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:55,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:55,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:55,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:00,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:00,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:31:00,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:31:00,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:31:00,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:31:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:31:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:31:00,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:00,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:00,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:00,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:00,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:00,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:00,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:31:00,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:00,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:00,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:31:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-10-27 14:31:00,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335257640] [2020-10-27 14:31:00,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:00,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:31:00,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072051906] [2020-10-27 14:31:00,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:31:00,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:00,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:31:00,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:31:00,203 INFO L87 Difference]: Start difference. First operand 164 states and 214 transitions. Second operand 8 states. [2020-10-27 14:31:00,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:00,433 INFO L93 Difference]: Finished difference Result 373 states and 496 transitions. [2020-10-27 14:31:00,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:31:00,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-27 14:31:00,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:00,435 INFO L225 Difference]: With dead ends: 373 [2020-10-27 14:31:00,435 INFO L226 Difference]: Without dead ends: 224 [2020-10-27 14:31:00,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:31:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-27 14:31:00,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 194. [2020-10-27 14:31:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-27 14:31:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 254 transitions. [2020-10-27 14:31:00,457 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 254 transitions. Word has length 65 [2020-10-27 14:31:00,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:00,457 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 254 transitions. [2020-10-27 14:31:00,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:31:00,457 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 254 transitions. [2020-10-27 14:31:00,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:31:00,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:00,466 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:00,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:31:00,466 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:00,467 INFO L82 PathProgramCache]: Analyzing trace with hash -906202031, now seen corresponding path program 3 times [2020-10-27 14:31:00,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:00,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099275070] [2020-10-27 14:31:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:00,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:00,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:00,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:00,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:00,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:04,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:04,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:05,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:05,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:05,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:31:05,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:31:05,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:31:05,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:05,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:31:05,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 14:31:05,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:31:05,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:05,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:05,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:05,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:05,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:05,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:31:05,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:05,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-27 14:31:05,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099275070] [2020-10-27 14:31:05,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:05,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:31:05,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647800846] [2020-10-27 14:31:05,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:31:05,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:05,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:31:05,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:31:05,621 INFO L87 Difference]: Start difference. First operand 194 states and 254 transitions. Second operand 9 states. [2020-10-27 14:31:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:05,852 INFO L93 Difference]: Finished difference Result 431 states and 574 transitions. [2020-10-27 14:31:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:31:05,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-27 14:31:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:05,855 INFO L225 Difference]: With dead ends: 431 [2020-10-27 14:31:05,855 INFO L226 Difference]: Without dead ends: 254 [2020-10-27 14:31:05,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:31:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-27 14:31:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 224. [2020-10-27 14:31:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-27 14:31:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 294 transitions. [2020-10-27 14:31:05,870 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 294 transitions. Word has length 77 [2020-10-27 14:31:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:05,870 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 294 transitions. [2020-10-27 14:31:05,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:31:05,870 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 294 transitions. [2020-10-27 14:31:05,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:31:05,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:05,872 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:05,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:31:05,872 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:05,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:05,873 INFO L82 PathProgramCache]: Analyzing trace with hash -354876234, now seen corresponding path program 4 times [2020-10-27 14:31:05,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:05,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338081326] [2020-10-27 14:31:05,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:05,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:05,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:06,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:06,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:06,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:07,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:10,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:10,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:31:10,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:31:10,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:31:10,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:10,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:31:10,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:31:10,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:31:10,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 14:31:11,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:11,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:11,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:11,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:11,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:11,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:31:11,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:11,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:11,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:11,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:11,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-10-27 14:31:11,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338081326] [2020-10-27 14:31:11,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:11,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:31:11,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260111983] [2020-10-27 14:31:11,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:31:11,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:11,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:31:11,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:31:11,144 INFO L87 Difference]: Start difference. First operand 224 states and 294 transitions. Second operand 9 states. [2020-10-27 14:31:11,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:11,682 INFO L93 Difference]: Finished difference Result 422 states and 555 transitions. [2020-10-27 14:31:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:31:11,682 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-10-27 14:31:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:11,686 INFO L225 Difference]: With dead ends: 422 [2020-10-27 14:31:11,686 INFO L226 Difference]: Without dead ends: 366 [2020-10-27 14:31:11,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:31:11,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-27 14:31:11,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 260. [2020-10-27 14:31:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-27 14:31:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 341 transitions. [2020-10-27 14:31:11,714 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 341 transitions. Word has length 89 [2020-10-27 14:31:11,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:11,715 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 341 transitions. [2020-10-27 14:31:11,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:31:11,715 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 341 transitions. [2020-10-27 14:31:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:31:11,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:11,718 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:11,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:31:11,718 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:11,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1726683532, now seen corresponding path program 5 times [2020-10-27 14:31:11,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:11,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080331123] [2020-10-27 14:31:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:11,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:11,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:11,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:12,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:12,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:16,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:16,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:31:16,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:31:16,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:31:16,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:16,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:31:16,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:31:16,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:31:16,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:16,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:16,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:16,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:16,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:16,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:16,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:16,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:16,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:16,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:16,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:16,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-27 14:31:16,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080331123] [2020-10-27 14:31:16,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:16,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:31:16,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054087207] [2020-10-27 14:31:16,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:31:16,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:16,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:31:16,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:31:16,856 INFO L87 Difference]: Start difference. First operand 260 states and 341 transitions. Second operand 10 states. [2020-10-27 14:31:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:17,133 INFO L93 Difference]: Finished difference Result 566 states and 754 transitions. [2020-10-27 14:31:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:31:17,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-10-27 14:31:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:17,141 INFO L225 Difference]: With dead ends: 566 [2020-10-27 14:31:17,144 INFO L226 Difference]: Without dead ends: 325 [2020-10-27 14:31:17,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:31:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-27 14:31:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 293. [2020-10-27 14:31:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-27 14:31:17,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 385 transitions. [2020-10-27 14:31:17,176 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 385 transitions. Word has length 89 [2020-10-27 14:31:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:17,176 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 385 transitions. [2020-10-27 14:31:17,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:31:17,176 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 385 transitions. [2020-10-27 14:31:17,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:31:17,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:17,181 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:17,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:31:17,181 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:17,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1330966609, now seen corresponding path program 6 times [2020-10-27 14:31:17,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:17,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413295961] [2020-10-27 14:31:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:17,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:17,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:17,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:17,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:17,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:19,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:22,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:22,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 14:31:22,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:31:22,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:31:22,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:22,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:31:22,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:31:22,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:31:22,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:22,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:22,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:22,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:22,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:22,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:22,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:22,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:22,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:22,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:22,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:22,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:31:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 88 proven. 85 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 14:31:22,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413295961] [2020-10-27 14:31:22,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:22,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:31:22,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127651172] [2020-10-27 14:31:22,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:31:22,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:22,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:31:22,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:31:22,470 INFO L87 Difference]: Start difference. First operand 293 states and 385 transitions. Second operand 13 states. [2020-10-27 14:31:23,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:23,722 INFO L93 Difference]: Finished difference Result 499 states and 660 transitions. [2020-10-27 14:31:23,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:31:23,723 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 101 [2020-10-27 14:31:23,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:23,726 INFO L225 Difference]: With dead ends: 499 [2020-10-27 14:31:23,726 INFO L226 Difference]: Without dead ends: 454 [2020-10-27 14:31:23,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:31:23,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-27 14:31:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 370. [2020-10-27 14:31:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-27 14:31:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 488 transitions. [2020-10-27 14:31:23,743 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 488 transitions. Word has length 101 [2020-10-27 14:31:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:23,744 INFO L481 AbstractCegarLoop]: Abstraction has 370 states and 488 transitions. [2020-10-27 14:31:23,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:31:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 488 transitions. [2020-10-27 14:31:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:31:23,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:23,745 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:23,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:31:23,746 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:23,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1403353167, now seen corresponding path program 7 times [2020-10-27 14:31:23,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:23,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759840473] [2020-10-27 14:31:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:23,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:23,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:23,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:24,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:24,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:28,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:28,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 14:31:28,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:31:28,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:31:28,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:28,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:31:28,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:31:28,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:31:28,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:28,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:28,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:28,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:28,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:28,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:28,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:28,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:28,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:28,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:28,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:28,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-10-27 14:31:28,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759840473] [2020-10-27 14:31:28,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:28,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:31:28,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305982450] [2020-10-27 14:31:28,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:31:28,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:28,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:31:28,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:31:28,904 INFO L87 Difference]: Start difference. First operand 370 states and 488 transitions. Second operand 7 states. [2020-10-27 14:31:29,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:29,164 INFO L93 Difference]: Finished difference Result 614 states and 807 transitions. [2020-10-27 14:31:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:31:29,165 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-10-27 14:31:29,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:29,169 INFO L225 Difference]: With dead ends: 614 [2020-10-27 14:31:29,169 INFO L226 Difference]: Without dead ends: 536 [2020-10-27 14:31:29,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:31:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-10-27 14:31:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 394. [2020-10-27 14:31:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-27 14:31:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 520 transitions. [2020-10-27 14:31:29,191 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 520 transitions. Word has length 101 [2020-10-27 14:31:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:29,192 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 520 transitions. [2020-10-27 14:31:29,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:31:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 520 transitions. [2020-10-27 14:31:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:31:29,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:29,195 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:29,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:31:29,195 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:29,198 INFO L82 PathProgramCache]: Analyzing trace with hash -527334161, now seen corresponding path program 8 times [2020-10-27 14:31:29,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:29,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055598089] [2020-10-27 14:31:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:29,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:29,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:29,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:29,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:33,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:34,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:34,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 14:31:34,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:31:34,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:31:34,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:34,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:31:34,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:31:34,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 14:31:34,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:34,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:34,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:34,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:34,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:34,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:34,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:34,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:34,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:34,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:34,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:34,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 31 proven. 193 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 14:31:34,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055598089] [2020-10-27 14:31:34,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:34,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:31:34,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788334260] [2020-10-27 14:31:34,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:31:34,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:34,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:31:34,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:31:34,668 INFO L87 Difference]: Start difference. First operand 394 states and 520 transitions. Second operand 19 states. [2020-10-27 14:31:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:37,148 INFO L93 Difference]: Finished difference Result 626 states and 832 transitions. [2020-10-27 14:31:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:31:37,148 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 101 [2020-10-27 14:31:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:37,153 INFO L225 Difference]: With dead ends: 626 [2020-10-27 14:31:37,154 INFO L226 Difference]: Without dead ends: 608 [2020-10-27 14:31:37,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=195, Invalid=2061, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:31:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-10-27 14:31:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 529. [2020-10-27 14:31:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-10-27 14:31:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 703 transitions. [2020-10-27 14:31:37,194 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 703 transitions. Word has length 101 [2020-10-27 14:31:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:37,194 INFO L481 AbstractCegarLoop]: Abstraction has 529 states and 703 transitions. [2020-10-27 14:31:37,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:31:37,195 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 703 transitions. [2020-10-27 14:31:37,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:31:37,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:37,200 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:37,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:31:37,201 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash -269168723, now seen corresponding path program 9 times [2020-10-27 14:31:37,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:37,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269808391] [2020-10-27 14:31:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:37,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:37,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:37,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:37,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:42,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:42,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 14:31:42,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:31:42,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:31:42,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:42,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:31:42,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:31:42,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:31:42,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:42,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:42,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:42,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:42,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:42,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:42,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:42,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:42,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:42,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:42,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:42,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 64 proven. 153 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-27 14:31:42,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269808391] [2020-10-27 14:31:42,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:42,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:31:42,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548062006] [2020-10-27 14:31:42,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:31:42,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:42,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:31:42,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:31:42,580 INFO L87 Difference]: Start difference. First operand 529 states and 703 transitions. Second operand 17 states. [2020-10-27 14:31:44,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:44,510 INFO L93 Difference]: Finished difference Result 720 states and 956 transitions. [2020-10-27 14:31:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:31:44,511 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2020-10-27 14:31:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:44,516 INFO L225 Difference]: With dead ends: 720 [2020-10-27 14:31:44,516 INFO L226 Difference]: Without dead ends: 695 [2020-10-27 14:31:44,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:31:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-10-27 14:31:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 644. [2020-10-27 14:31:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-10-27 14:31:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 858 transitions. [2020-10-27 14:31:44,546 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 858 transitions. Word has length 101 [2020-10-27 14:31:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:44,547 INFO L481 AbstractCegarLoop]: Abstraction has 644 states and 858 transitions. [2020-10-27 14:31:44,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:31:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 858 transitions. [2020-10-27 14:31:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:31:44,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:44,549 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:44,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:31:44,550 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1958112465, now seen corresponding path program 10 times [2020-10-27 14:31:44,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:44,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739215372] [2020-10-27 14:31:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:44,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:44,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:44,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:49,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:49,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 14:31:49,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:31:49,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:31:49,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:49,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:31:49,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:31:49,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:31:49,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:49,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:49,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:49,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:49,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:49,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:49,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:49,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:49,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:49,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:49,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:49,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-10-27 14:31:49,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739215372] [2020-10-27 14:31:49,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:49,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:31:49,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294656056] [2020-10-27 14:31:49,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:31:49,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:49,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:31:49,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:31:49,697 INFO L87 Difference]: Start difference. First operand 644 states and 858 transitions. Second operand 11 states. [2020-10-27 14:31:50,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:50,018 INFO L93 Difference]: Finished difference Result 1351 states and 1816 transitions. [2020-10-27 14:31:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:31:50,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-10-27 14:31:50,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:50,024 INFO L225 Difference]: With dead ends: 1351 [2020-10-27 14:31:50,024 INFO L226 Difference]: Without dead ends: 728 [2020-10-27 14:31:50,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:31:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2020-10-27 14:31:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 688. [2020-10-27 14:31:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2020-10-27 14:31:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 916 transitions. [2020-10-27 14:31:50,054 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 916 transitions. Word has length 101 [2020-10-27 14:31:50,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:50,054 INFO L481 AbstractCegarLoop]: Abstraction has 688 states and 916 transitions. [2020-10-27 14:31:50,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:31:50,055 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 916 transitions. [2020-10-27 14:31:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:31:50,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:50,057 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:50,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:31:50,058 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:50,058 INFO L82 PathProgramCache]: Analyzing trace with hash -696778736, now seen corresponding path program 11 times [2020-10-27 14:31:50,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:50,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319006973] [2020-10-27 14:31:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:50,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:50,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:50,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:53,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:55,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:55,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 14:31:55,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:31:55,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:31:55,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:55,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:31:55,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:31:55,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:31:55,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:55,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:55,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:55,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:55,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:55,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:55,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:55,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:55,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:55,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:55,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:55,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 114 proven. 131 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-27 14:31:55,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319006973] [2020-10-27 14:31:55,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:55,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:31:55,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886498547] [2020-10-27 14:31:55,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:31:55,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:55,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:31:55,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:31:55,402 INFO L87 Difference]: Start difference. First operand 688 states and 916 transitions. Second operand 15 states. [2020-10-27 14:31:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:56,960 INFO L93 Difference]: Finished difference Result 913 states and 1212 transitions. [2020-10-27 14:31:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:31:56,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 113 [2020-10-27 14:31:56,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:56,965 INFO L225 Difference]: With dead ends: 913 [2020-10-27 14:31:56,965 INFO L226 Difference]: Without dead ends: 868 [2020-10-27 14:31:56,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:31:56,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2020-10-27 14:31:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 787. [2020-10-27 14:31:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2020-10-27 14:31:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1049 transitions. [2020-10-27 14:31:57,001 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1049 transitions. Word has length 113 [2020-10-27 14:31:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:57,001 INFO L481 AbstractCegarLoop]: Abstraction has 787 states and 1049 transitions. [2020-10-27 14:31:57,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:31:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1049 transitions. [2020-10-27 14:31:57,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:31:57,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:57,004 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:57,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:31:57,004 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:57,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:57,005 INFO L82 PathProgramCache]: Analyzing trace with hash -769165294, now seen corresponding path program 12 times [2020-10-27 14:31:57,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:57,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929808948] [2020-10-27 14:31:57,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:57,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:57,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:57,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:02,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:02,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 14:32:02,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:02,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:32:02,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:02,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:32:02,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:32:02,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:32:02,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:32:02,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:02,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:02,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:02,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:02,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:02,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:02,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:02,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:02,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:02,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:02,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-10-27 14:32:02,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929808948] [2020-10-27 14:32:02,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:02,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:32:02,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924262831] [2020-10-27 14:32:02,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:32:02,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:02,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:32:02,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:32:02,186 INFO L87 Difference]: Start difference. First operand 787 states and 1049 transitions. Second operand 12 states. [2020-10-27 14:32:02,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:02,515 INFO L93 Difference]: Finished difference Result 1641 states and 2206 transitions. [2020-10-27 14:32:02,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:32:02,515 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 113 [2020-10-27 14:32:02,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:02,520 INFO L225 Difference]: With dead ends: 1641 [2020-10-27 14:32:02,520 INFO L226 Difference]: Without dead ends: 877 [2020-10-27 14:32:02,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:32:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2020-10-27 14:32:02,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 835. [2020-10-27 14:32:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 835 states. [2020-10-27 14:32:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1113 transitions. [2020-10-27 14:32:02,556 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1113 transitions. Word has length 113 [2020-10-27 14:32:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:02,556 INFO L481 AbstractCegarLoop]: Abstraction has 835 states and 1113 transitions. [2020-10-27 14:32:02,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:32:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1113 transitions. [2020-10-27 14:32:02,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 14:32:02,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:02,560 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:02,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:32:02,560 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:02,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:02,560 INFO L82 PathProgramCache]: Analyzing trace with hash 373208649, now seen corresponding path program 13 times [2020-10-27 14:32:02,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:02,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997441982] [2020-10-27 14:32:02,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:02,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:02,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:03,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:04,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:07,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:07,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 14:32:07,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:32:07,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:32:07,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:07,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:32:07,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:32:07,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 14:32:07,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:08,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:08,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:08,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:08,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:08,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:08,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:08,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:08,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:08,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:08,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:08,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 41 proven. 337 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 14:32:08,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997441982] [2020-10-27 14:32:08,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:08,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:32:08,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507337669] [2020-10-27 14:32:08,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:32:08,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:08,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:32:08,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:32:08,172 INFO L87 Difference]: Start difference. First operand 835 states and 1113 transitions. Second operand 23 states. [2020-10-27 14:32:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:11,743 INFO L93 Difference]: Finished difference Result 1116 states and 1493 transitions. [2020-10-27 14:32:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 14:32:11,744 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 125 [2020-10-27 14:32:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:11,750 INFO L225 Difference]: With dead ends: 1116 [2020-10-27 14:32:11,750 INFO L226 Difference]: Without dead ends: 1098 [2020-10-27 14:32:11,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=247, Invalid=3293, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 14:32:11,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2020-10-27 14:32:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1014. [2020-10-27 14:32:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1014 states. [2020-10-27 14:32:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1356 transitions. [2020-10-27 14:32:11,787 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1356 transitions. Word has length 125 [2020-10-27 14:32:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:11,787 INFO L481 AbstractCegarLoop]: Abstraction has 1014 states and 1356 transitions. [2020-10-27 14:32:11,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:32:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1356 transitions. [2020-10-27 14:32:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 14:32:11,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:11,791 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:11,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:32:11,791 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash 631374087, now seen corresponding path program 14 times [2020-10-27 14:32:11,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:11,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345858433] [2020-10-27 14:32:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:11,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:11,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:12,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:16,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:16,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 14:32:16,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:16,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:32:16,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:16,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:32:16,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:32:16,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 14:32:16,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:17,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:17,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:17,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:17,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:17,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:17,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:17,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:17,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:17,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 88 proven. 283 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-27 14:32:17,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345858433] [2020-10-27 14:32:17,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:17,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:32:17,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146297329] [2020-10-27 14:32:17,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:32:17,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:17,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:32:17,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:32:17,291 INFO L87 Difference]: Start difference. First operand 1014 states and 1356 transitions. Second operand 21 states. [2020-10-27 14:32:20,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:20,307 INFO L93 Difference]: Finished difference Result 1248 states and 1668 transitions. [2020-10-27 14:32:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 14:32:20,308 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2020-10-27 14:32:20,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:20,314 INFO L225 Difference]: With dead ends: 1248 [2020-10-27 14:32:20,314 INFO L226 Difference]: Without dead ends: 1223 [2020-10-27 14:32:20,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=221, Invalid=2641, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 14:32:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2020-10-27 14:32:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1173. [2020-10-27 14:32:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1173 states. [2020-10-27 14:32:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1571 transitions. [2020-10-27 14:32:20,356 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1571 transitions. Word has length 125 [2020-10-27 14:32:20,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:20,356 INFO L481 AbstractCegarLoop]: Abstraction has 1173 states and 1571 transitions. [2020-10-27 14:32:20,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:32:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1571 transitions. [2020-10-27 14:32:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 14:32:20,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:20,360 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:20,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:32:20,361 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:20,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:20,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1931407029, now seen corresponding path program 1 times [2020-10-27 14:32:20,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:20,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860653732] [2020-10-27 14:32:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:20,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:20,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:20,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:21,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:23,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:25,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:25,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 14:32:25,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:32:25,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:32:25,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:25,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:32:25,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:32:25,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 14:32:25,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:26,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:26,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:26,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:26,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:26,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:26,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:26,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:26,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:26,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:26,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:26,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 41 proven. 337 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 14:32:26,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860653732] [2020-10-27 14:32:26,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:26,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:32:26,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854616785] [2020-10-27 14:32:26,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:32:26,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:26,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:32:26,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:32:26,059 INFO L87 Difference]: Start difference. First operand 1173 states and 1571 transitions. Second operand 24 states. [2020-10-27 14:32:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:28,642 INFO L93 Difference]: Finished difference Result 1457 states and 1955 transitions. [2020-10-27 14:32:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:32:28,643 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 125 [2020-10-27 14:32:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:28,651 INFO L225 Difference]: With dead ends: 1457 [2020-10-27 14:32:28,651 INFO L226 Difference]: Without dead ends: 1428 [2020-10-27 14:32:28,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:32:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2020-10-27 14:32:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1359. [2020-10-27 14:32:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1359 states. [2020-10-27 14:32:28,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1826 transitions. [2020-10-27 14:32:28,709 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1826 transitions. Word has length 125 [2020-10-27 14:32:28,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:28,709 INFO L481 AbstractCegarLoop]: Abstraction has 1359 states and 1826 transitions. [2020-10-27 14:32:28,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:32:28,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1826 transitions. [2020-10-27 14:32:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 14:32:28,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:28,714 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:28,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:32:28,714 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash 734198151, now seen corresponding path program 2 times [2020-10-27 14:32:28,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:28,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482109582] [2020-10-27 14:32:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:28,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:28,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:29,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:30,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:31,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:32,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:33,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:33,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 14:32:33,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:32:33,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:32:33,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:33,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:32:33,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:32:33,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:32:33,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:33,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:33,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:33,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:33,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:33,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:33,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:33,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:33,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:33,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-27 14:32:33,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482109582] [2020-10-27 14:32:33,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:33,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:32:33,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393610146] [2020-10-27 14:32:33,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:32:33,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:33,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:32:33,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:32:33,905 INFO L87 Difference]: Start difference. First operand 1359 states and 1826 transitions. Second operand 13 states. [2020-10-27 14:32:34,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:34,242 INFO L93 Difference]: Finished difference Result 2784 states and 3755 transitions. [2020-10-27 14:32:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:32:34,246 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 125 [2020-10-27 14:32:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:34,251 INFO L225 Difference]: With dead ends: 2784 [2020-10-27 14:32:34,251 INFO L226 Difference]: Without dead ends: 1450 [2020-10-27 14:32:34,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:32:34,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2020-10-27 14:32:34,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1403. [2020-10-27 14:32:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1403 states. [2020-10-27 14:32:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1878 transitions. [2020-10-27 14:32:34,302 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1878 transitions. Word has length 125 [2020-10-27 14:32:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:34,302 INFO L481 AbstractCegarLoop]: Abstraction has 1403 states and 1878 transitions. [2020-10-27 14:32:34,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:32:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1878 transitions. [2020-10-27 14:32:34,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 14:32:34,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:34,307 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:34,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:32:34,307 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:34,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:34,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1777095022, now seen corresponding path program 15 times [2020-10-27 14:32:34,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:34,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949927819] [2020-10-27 14:32:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:34,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:34,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:34,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:39,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:39,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 14:32:39,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:39,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 14:32:39,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:39,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:32:39,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:32:39,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 14:32:39,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:39,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:39,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:39,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:39,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:39,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:39,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:39,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:39,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:39,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:39,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:39,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 46 proven. 424 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 14:32:40,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949927819] [2020-10-27 14:32:40,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:40,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:32:40,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980925724] [2020-10-27 14:32:40,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:32:40,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:40,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:32:40,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:32:40,020 INFO L87 Difference]: Start difference. First operand 1403 states and 1878 transitions. Second operand 25 states. [2020-10-27 14:32:44,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:44,368 INFO L93 Difference]: Finished difference Result 1711 states and 2295 transitions. [2020-10-27 14:32:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 14:32:44,369 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 137 [2020-10-27 14:32:44,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:44,376 INFO L225 Difference]: With dead ends: 1711 [2020-10-27 14:32:44,376 INFO L226 Difference]: Without dead ends: 1693 [2020-10-27 14:32:44,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=273, Invalid=4017, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 14:32:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2020-10-27 14:32:44,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1604. [2020-10-27 14:32:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2020-10-27 14:32:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2151 transitions. [2020-10-27 14:32:44,430 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2151 transitions. Word has length 137 [2020-10-27 14:32:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:44,431 INFO L481 AbstractCegarLoop]: Abstraction has 1604 states and 2151 transitions. [2020-10-27 14:32:44,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:32:44,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2151 transitions. [2020-10-27 14:32:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 14:32:44,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:44,435 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:44,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:32:44,435 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:44,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1161423086, now seen corresponding path program 3 times [2020-10-27 14:32:44,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:44,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561359963] [2020-10-27 14:32:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:44,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:44,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:44,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:46,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:49,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:49,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 14:32:49,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:32:49,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:32:49,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:49,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:32:49,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:32:49,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 14:32:49,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:50,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:50,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:50,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:50,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:50,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:50,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:50,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:50,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:50,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:50,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:50,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 55 proven. 415 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 14:32:50,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561359963] [2020-10-27 14:32:50,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:50,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:32:50,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784021956] [2020-10-27 14:32:50,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:32:50,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:50,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:32:50,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:32:50,295 INFO L87 Difference]: Start difference. First operand 1604 states and 2151 transitions. Second operand 26 states. [2020-10-27 14:32:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:53,554 INFO L93 Difference]: Finished difference Result 2090 states and 2808 transitions. [2020-10-27 14:32:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:32:53,554 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 137 [2020-10-27 14:32:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:53,564 INFO L225 Difference]: With dead ends: 2090 [2020-10-27 14:32:53,564 INFO L226 Difference]: Without dead ends: 2061 [2020-10-27 14:32:53,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:32:53,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2020-10-27 14:32:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1990. [2020-10-27 14:32:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1990 states. [2020-10-27 14:32:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 2677 transitions. [2020-10-27 14:32:53,630 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 2677 transitions. Word has length 137 [2020-10-27 14:32:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:53,631 INFO L481 AbstractCegarLoop]: Abstraction has 1990 states and 2677 transitions. [2020-10-27 14:32:53,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:32:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 2677 transitions. [2020-10-27 14:32:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 14:32:53,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:53,636 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:53,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:32:53,636 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:53,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1602973038, now seen corresponding path program 4 times [2020-10-27 14:32:53,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:53,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652413115] [2020-10-27 14:32:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:53,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:53,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:53,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:54,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:56,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:58,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:58,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 14:32:58,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:32:58,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 14:32:58,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:32:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:32:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 14:32:58,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:59,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:59,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:59,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:59,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:59,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:59,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:59,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:59,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:59,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:59,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:59,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 140 proven. 306 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-10-27 14:32:59,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652413115] [2020-10-27 14:32:59,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:59,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:32:59,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607463730] [2020-10-27 14:32:59,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:32:59,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:32:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:32:59,349 INFO L87 Difference]: Start difference. First operand 1990 states and 2677 transitions. Second operand 22 states. [2020-10-27 14:33:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:01,514 INFO L93 Difference]: Finished difference Result 3124 states and 4191 transitions. [2020-10-27 14:33:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:33:01,515 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 137 [2020-10-27 14:33:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:01,525 INFO L225 Difference]: With dead ends: 3124 [2020-10-27 14:33:01,525 INFO L226 Difference]: Without dead ends: 2936 [2020-10-27 14:33:01,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:33:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2020-10-27 14:33:01,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2768. [2020-10-27 14:33:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2768 states. [2020-10-27 14:33:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 3724 transitions. [2020-10-27 14:33:01,624 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 3724 transitions. Word has length 137 [2020-10-27 14:33:01,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:01,624 INFO L481 AbstractCegarLoop]: Abstraction has 2768 states and 3724 transitions. [2020-10-27 14:33:01,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:33:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 3724 transitions. [2020-10-27 14:33:01,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 14:33:01,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:01,631 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:01,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:33:01,632 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:01,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:01,632 INFO L82 PathProgramCache]: Analyzing trace with hash -932954966, now seen corresponding path program 5 times [2020-10-27 14:33:01,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:01,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992502129] [2020-10-27 14:33:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:01,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:01,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:01,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:02,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:04,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:06,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:06,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:06,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 14:33:06,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:33:06,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:33:06,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:06,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:33:06,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:33:06,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:33:06,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:06,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:06,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:06,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:06,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:06,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:06,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:33:06,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:06,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-27 14:33:06,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992502129] [2020-10-27 14:33:06,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:06,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:33:06,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251616979] [2020-10-27 14:33:06,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:33:06,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:06,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:33:06,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:33:06,873 INFO L87 Difference]: Start difference. First operand 2768 states and 3724 transitions. Second operand 14 states. [2020-10-27 14:33:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:07,429 INFO L93 Difference]: Finished difference Result 5623 states and 7582 transitions. [2020-10-27 14:33:07,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:33:07,430 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 137 [2020-10-27 14:33:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:07,442 INFO L225 Difference]: With dead ends: 5623 [2020-10-27 14:33:07,442 INFO L226 Difference]: Without dead ends: 2882 [2020-10-27 14:33:07,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:33:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2020-10-27 14:33:07,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2822. [2020-10-27 14:33:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2822 states. [2020-10-27 14:33:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 3786 transitions. [2020-10-27 14:33:07,550 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 3786 transitions. Word has length 137 [2020-10-27 14:33:07,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:07,551 INFO L481 AbstractCegarLoop]: Abstraction has 2822 states and 3786 transitions. [2020-10-27 14:33:07,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:33:07,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 3786 transitions. [2020-10-27 14:33:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 14:33:07,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:07,559 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:07,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:33:07,559 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:07,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:07,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1096338713, now seen corresponding path program 16 times [2020-10-27 14:33:07,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:07,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778249780] [2020-10-27 14:33:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:07,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:07,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:08,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:12,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:12,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 14:33:12,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:12,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:33:12,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:12,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:33:12,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:33:12,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:33:12,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:12,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:12,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:12,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:12,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:12,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:12,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:33:12,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:12,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:12,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-10-27 14:33:12,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778249780] [2020-10-27 14:33:12,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:12,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:33:12,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811929100] [2020-10-27 14:33:12,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:33:12,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:12,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:33:12,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:33:12,811 INFO L87 Difference]: Start difference. First operand 2822 states and 3786 transitions. Second operand 15 states. [2020-10-27 14:33:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:13,265 INFO L93 Difference]: Finished difference Result 5756 states and 7754 transitions. [2020-10-27 14:33:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:33:13,265 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 149 [2020-10-27 14:33:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:13,278 INFO L225 Difference]: With dead ends: 5756 [2020-10-27 14:33:13,278 INFO L226 Difference]: Without dead ends: 2963 [2020-10-27 14:33:13,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:33:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-10-27 14:33:13,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2899. [2020-10-27 14:33:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2899 states. [2020-10-27 14:33:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 3886 transitions. [2020-10-27 14:33:13,384 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 3886 transitions. Word has length 149 [2020-10-27 14:33:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:13,385 INFO L481 AbstractCegarLoop]: Abstraction has 2899 states and 3886 transitions. [2020-10-27 14:33:13,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:33:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 3886 transitions. [2020-10-27 14:33:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 14:33:13,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:13,392 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:13,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:33:13,393 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash 683238728, now seen corresponding path program 17 times [2020-10-27 14:33:13,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:13,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533176679] [2020-10-27 14:33:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:13,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:13,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:14,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:18,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:18,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 14:33:18,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:18,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-27 14:33:18,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:33:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:33:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:33:18,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:18,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:18,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:18,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:18,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:18,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:18,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:18,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:18,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:18,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:18,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:18,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2020-10-27 14:33:18,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533176679] [2020-10-27 14:33:18,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:18,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:33:18,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029855862] [2020-10-27 14:33:18,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:33:18,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:18,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:33:18,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:33:18,716 INFO L87 Difference]: Start difference. First operand 2899 states and 3886 transitions. Second operand 16 states. [2020-10-27 14:33:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:19,170 INFO L93 Difference]: Finished difference Result 5912 states and 7960 transitions. [2020-10-27 14:33:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:33:19,171 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2020-10-27 14:33:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:19,184 INFO L225 Difference]: With dead ends: 5912 [2020-10-27 14:33:19,185 INFO L226 Difference]: Without dead ends: 3044 [2020-10-27 14:33:19,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:33:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2020-10-27 14:33:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2980. [2020-10-27 14:33:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2980 states. [2020-10-27 14:33:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 3994 transitions. [2020-10-27 14:33:19,283 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 3994 transitions. Word has length 161 [2020-10-27 14:33:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:19,284 INFO L481 AbstractCegarLoop]: Abstraction has 2980 states and 3994 transitions. [2020-10-27 14:33:19,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:33:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 3994 transitions. [2020-10-27 14:33:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 14:33:19,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:19,291 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:19,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:33:19,292 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash 105361475, now seen corresponding path program 18 times [2020-10-27 14:33:19,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:19,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260294388] [2020-10-27 14:33:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:19,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:19,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:21,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:24,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:24,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 14:33:24,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:24,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 14:33:24,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:24,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:33:24,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:33:24,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 14:33:24,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:25,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:25,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:25,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:25,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:25,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:25,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:25,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:25,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 197 proven. 585 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2020-10-27 14:33:25,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260294388] [2020-10-27 14:33:25,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:25,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:33:25,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015188898] [2020-10-27 14:33:25,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:33:25,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:25,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:33:25,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:33:25,160 INFO L87 Difference]: Start difference. First operand 2980 states and 3994 transitions. Second operand 27 states. [2020-10-27 14:33:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:30,387 INFO L93 Difference]: Finished difference Result 3818 states and 5117 transitions. [2020-10-27 14:33:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 14:33:30,388 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 173 [2020-10-27 14:33:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:30,397 INFO L225 Difference]: With dead ends: 3818 [2020-10-27 14:33:30,398 INFO L226 Difference]: Without dead ends: 3784 [2020-10-27 14:33:30,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=299, Invalid=4813, Unknown=0, NotChecked=0, Total=5112 [2020-10-27 14:33:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3784 states. [2020-10-27 14:33:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3784 to 3710. [2020-10-27 14:33:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3710 states. [2020-10-27 14:33:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 4978 transitions. [2020-10-27 14:33:30,531 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 4978 transitions. Word has length 173 [2020-10-27 14:33:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:30,531 INFO L481 AbstractCegarLoop]: Abstraction has 3710 states and 4978 transitions. [2020-10-27 14:33:30,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:33:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 4978 transitions. [2020-10-27 14:33:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 14:33:30,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:30,541 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:30,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:33:30,542 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:30,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:30,542 INFO L82 PathProgramCache]: Analyzing trace with hash 167401089, now seen corresponding path program 19 times [2020-10-27 14:33:30,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:30,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238911832] [2020-10-27 14:33:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:30,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:30,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:32,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:35,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:35,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 14:33:35,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:35,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:33:35,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:35,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:33:35,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:33:35,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-27 14:33:35,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:36,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:36,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:36,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:36,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:36,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:36,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:33:36,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:36,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:36,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:36,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:36,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 136 proven. 663 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-27 14:33:36,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238911832] [2020-10-27 14:33:36,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:36,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:33:36,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291258678] [2020-10-27 14:33:36,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:33:36,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:33:36,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:33:36,490 INFO L87 Difference]: Start difference. First operand 3710 states and 4978 transitions. Second operand 29 states. [2020-10-27 14:33:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:42,571 INFO L93 Difference]: Finished difference Result 5219 states and 7004 transitions. [2020-10-27 14:33:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-27 14:33:42,576 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 173 [2020-10-27 14:33:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:42,596 INFO L225 Difference]: With dead ends: 5219 [2020-10-27 14:33:42,596 INFO L226 Difference]: Without dead ends: 5196 [2020-10-27 14:33:42,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=325, Invalid=5681, Unknown=0, NotChecked=0, Total=6006 [2020-10-27 14:33:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5196 states. [2020-10-27 14:33:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5196 to 5144. [2020-10-27 14:33:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5144 states. [2020-10-27 14:33:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 6910 transitions. [2020-10-27 14:33:42,748 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 6910 transitions. Word has length 173 [2020-10-27 14:33:42,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:42,748 INFO L481 AbstractCegarLoop]: Abstraction has 5144 states and 6910 transitions. [2020-10-27 14:33:42,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:33:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 6910 transitions. [2020-10-27 14:33:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 14:33:42,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:42,765 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:42,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:33:42,766 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:42,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:42,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1521542653, now seen corresponding path program 20 times [2020-10-27 14:33:42,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:42,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359854918] [2020-10-27 14:33:42,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:42,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:42,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:47,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:47,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 14:33:47,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:33:47,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 14:33:47,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:33:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:33:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:33:47,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:48,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:48,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:48,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:48,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:48,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:48,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:33:48,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:48,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:48,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:48,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:48,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2020-10-27 14:33:48,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359854918] [2020-10-27 14:33:48,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:48,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:33:48,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969263251] [2020-10-27 14:33:48,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:33:48,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:48,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:33:48,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:33:48,133 INFO L87 Difference]: Start difference. First operand 5144 states and 6910 transitions. Second operand 17 states. [2020-10-27 14:33:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:48,658 INFO L93 Difference]: Finished difference Result 10460 states and 14102 transitions. [2020-10-27 14:33:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:33:48,660 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 173 [2020-10-27 14:33:48,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:48,672 INFO L225 Difference]: With dead ends: 10460 [2020-10-27 14:33:48,672 INFO L226 Difference]: Without dead ends: 5349 [2020-10-27 14:33:48,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:33:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2020-10-27 14:33:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 5261. [2020-10-27 14:33:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5261 states. [2020-10-27 14:33:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7066 transitions. [2020-10-27 14:33:48,841 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7066 transitions. Word has length 173 [2020-10-27 14:33:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:48,841 INFO L481 AbstractCegarLoop]: Abstraction has 5261 states and 7066 transitions. [2020-10-27 14:33:48,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:33:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7066 transitions. [2020-10-27 14:33:48,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 14:33:48,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:48,854 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:48,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:33:48,854 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:48,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:48,855 INFO L82 PathProgramCache]: Analyzing trace with hash -924370268, now seen corresponding path program 21 times [2020-10-27 14:33:48,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:48,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541996176] [2020-10-27 14:33:48,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:48,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:48,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:50,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:53,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:53,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-27 14:33:53,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:53,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:33:53,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:53,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:33:53,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:33:53,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-27 14:33:53,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:54,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:54,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:54,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:54,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:54,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:54,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:54,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:54,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:54,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:54,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:54,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 148 proven. 783 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-10-27 14:33:54,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541996176] [2020-10-27 14:33:54,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:54,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:33:54,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744902031] [2020-10-27 14:33:54,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:33:54,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:54,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:33:54,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:33:54,955 INFO L87 Difference]: Start difference. First operand 5261 states and 7066 transitions. Second operand 31 states. [2020-10-27 14:34:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:01,974 INFO L93 Difference]: Finished difference Result 6792 states and 9122 transitions. [2020-10-27 14:34:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-27 14:34:01,975 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 185 [2020-10-27 14:34:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:01,990 INFO L225 Difference]: With dead ends: 6792 [2020-10-27 14:34:01,990 INFO L226 Difference]: Without dead ends: 6769 [2020-10-27 14:34:01,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=351, Invalid=6621, Unknown=0, NotChecked=0, Total=6972 [2020-10-27 14:34:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2020-10-27 14:34:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 6717. [2020-10-27 14:34:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6717 states. [2020-10-27 14:34:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 9028 transitions. [2020-10-27 14:34:02,256 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 9028 transitions. Word has length 185 [2020-10-27 14:34:02,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:02,257 INFO L481 AbstractCegarLoop]: Abstraction has 6717 states and 9028 transitions. [2020-10-27 14:34:02,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:34:02,257 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 9028 transitions. [2020-10-27 14:34:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 14:34:02,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:02,273 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:02,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:34:02,273 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:02,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1681653286, now seen corresponding path program 22 times [2020-10-27 14:34:02,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:02,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102044464] [2020-10-27 14:34:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:02,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:02,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:07,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:07,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-27 14:34:07,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:34:07,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:34:07,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:34:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:34:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:34:07,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:07,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:07,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:07,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:07,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:07,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:07,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:34:07,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:07,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-10-27 14:34:07,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102044464] [2020-10-27 14:34:07,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:07,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:34:07,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600431289] [2020-10-27 14:34:07,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:34:07,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:07,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:34:07,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:34:07,609 INFO L87 Difference]: Start difference. First operand 6717 states and 9028 transitions. Second operand 18 states. [2020-10-27 14:34:08,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:08,201 INFO L93 Difference]: Finished difference Result 13644 states and 18400 transitions. [2020-10-27 14:34:08,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:34:08,202 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 185 [2020-10-27 14:34:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:08,213 INFO L225 Difference]: With dead ends: 13644 [2020-10-27 14:34:08,214 INFO L226 Difference]: Without dead ends: 6962 [2020-10-27 14:34:08,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:34:08,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2020-10-27 14:34:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 6858. [2020-10-27 14:34:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6858 states. [2020-10-27 14:34:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 9216 transitions. [2020-10-27 14:34:08,431 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 9216 transitions. Word has length 185 [2020-10-27 14:34:08,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:08,431 INFO L481 AbstractCegarLoop]: Abstraction has 6858 states and 9216 transitions. [2020-10-27 14:34:08,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:34:08,431 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 9216 transitions. [2020-10-27 14:34:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-27 14:34:08,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:08,448 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:08,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:34:08,449 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:08,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1303473053, now seen corresponding path program 23 times [2020-10-27 14:34:08,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:08,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685287822] [2020-10-27 14:34:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:08,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:08,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:10,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking...