/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:36:39,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:36:39,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:36:39,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:36:39,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:36:39,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:36:39,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:36:39,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:36:39,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:36:39,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:36:39,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:36:39,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:36:39,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:36:39,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:36:39,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:36:39,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:36:39,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:36:39,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:36:39,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:36:39,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:36:39,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:36:39,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:36:39,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:36:39,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:36:39,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:36:39,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:36:39,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:36:39,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:36:39,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:36:39,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:36:39,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:36:39,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:36:39,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:36:39,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:36:39,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:36:39,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:36:39,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:36:39,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:36:39,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:36:39,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:36:39,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:36:39,245 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 [2020-10-29 09:36:39,272 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:36:39,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:36:39,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:36:39,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:36:39,274 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:36:39,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:36:39,275 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:36:39,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:36:39,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:36:39,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:36:39,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:36:39,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:36:39,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:36:39,276 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:36:39,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:36:39,276 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:36:39,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:36:39,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:36:39,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:36:39,277 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:36:39,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:36:39,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:36:39,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:36:39,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:36:39,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:36:39,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:36:39,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:36:39,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:36:39,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:36:39,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:36:39,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:36:39,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:36:39,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:36:39,707 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:36:39,708 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:36:39,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2020-10-29 09:36:39,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a39fcb333/a24b856730d147c4a19d427a00633895/FLAG809a6de7e [2020-10-29 09:36:40,328 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:36:40,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2020-10-29 09:36:40,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a39fcb333/a24b856730d147c4a19d427a00633895/FLAG809a6de7e [2020-10-29 09:36:40,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a39fcb333/a24b856730d147c4a19d427a00633895 [2020-10-29 09:36:40,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:36:40,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:36:40,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:36:40,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:36:40,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:36:40,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:36:40" (1/1) ... [2020-10-29 09:36:40,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88d1a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:40, skipping insertion in model container [2020-10-29 09:36:40,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:36:40" (1/1) ... [2020-10-29 09:36:40,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:36:40,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:36:40,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:36:40,964 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:36:40,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:36:40,999 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:36:40,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:40 WrapperNode [2020-10-29 09:36:40,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:36:41,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:36:41,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:36:41,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:36:41,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:40" (1/1) ... [2020-10-29 09:36:41,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:40" (1/1) ... [2020-10-29 09:36:41,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:40" (1/1) ... [2020-10-29 09:36:41,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:40" (1/1) ... [2020-10-29 09:36:41,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:40" (1/1) ... [2020-10-29 09:36:41,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:40" (1/1) ... [2020-10-29 09:36:41,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:40" (1/1) ... [2020-10-29 09:36:41,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:36:41,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:36:41,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:36:41,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:36:41,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:40" (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 [2020-10-29 09:36:41,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:36:41,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:36:41,121 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:36:41,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:36:41,122 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:36:41,122 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:36:41,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:36:41,123 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:36:41,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:36:41,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:36:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:36:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:36:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:36:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:36:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:36:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:36:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:36:41,504 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:36:41,505 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:36:41,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:36:41 BoogieIcfgContainer [2020-10-29 09:36:41,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:36:41,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:36:41,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:36:41,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:36:41,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:36:40" (1/3) ... [2020-10-29 09:36:41,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e641131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:36:41, skipping insertion in model container [2020-10-29 09:36:41,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:40" (2/3) ... [2020-10-29 09:36:41,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e641131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:36:41, skipping insertion in model container [2020-10-29 09:36:41,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:36:41" (3/3) ... [2020-10-29 09:36:41,517 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2020-10-29 09:36:41,540 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:36:41,546 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:36:41,560 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:36:41,589 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:36:41,590 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:36:41,590 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:36:41,590 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:36:41,590 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:36:41,591 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:36:41,591 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:36:41,591 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:36:41,610 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-29 09:36:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:36:41,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:41,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:41,642 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:41,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2005875033, now seen corresponding path program 1 times [2020-10-29 09:36:41,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:41,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689093549] [2020-10-29 09:36:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:41,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:41,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:42,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:42,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:36:42,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:42,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-29 09:36:42,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:42,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:42,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:36:42,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:42,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:36:42,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:36:42,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:42,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:42,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:42,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:42,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:42,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 09:36:42,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:42,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:42,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:42,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:42,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:42,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:36:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:42,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689093549] [2020-10-29 09:36:42,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:36:42,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:36:42,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228940553] [2020-10-29 09:36:42,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:36:42,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:42,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:36:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:36:42,517 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-10-29 09:36:42,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:42,740 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2020-10-29 09:36:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:36:42,743 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-29 09:36:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:42,753 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:36:42,753 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:36:42,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:36:42,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:36:42,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-29 09:36:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-29 09:36:42,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-29 09:36:42,805 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-29 09:36:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:42,805 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-29 09:36:42,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:36:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-29 09:36:42,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:36:42,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:42,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:42,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:36:42,807 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:42,808 INFO L82 PathProgramCache]: Analyzing trace with hash 956003377, now seen corresponding path program 1 times [2020-10-29 09:36:42,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:42,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23795307] [2020-10-29 09:36:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:42,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:42,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:43,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:43,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:36:43,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:43,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-29 09:36:43,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:43,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:36:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:36:43,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:36:43,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:43,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:43,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:43,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:43,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:43,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:36:43,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:43,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:43,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:43,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:43,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:43,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:36:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:43,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23795307] [2020-10-29 09:36:43,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:43,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:36:43,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322522893] [2020-10-29 09:36:43,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:36:43,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:43,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:36:43,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:36:43,250 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-29 09:36:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:43,379 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-29 09:36:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:36:43,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-29 09:36:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:43,380 INFO L225 Difference]: With dead ends: 27 [2020-10-29 09:36:43,381 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:36:43,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:36:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:36:43,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-29 09:36:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:36:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-29 09:36:43,391 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-29 09:36:43,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:43,391 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-29 09:36:43,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:36:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-29 09:36:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:36:43,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:43,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:43,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:36:43,393 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:43,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:43,394 INFO L82 PathProgramCache]: Analyzing trace with hash -480605846, now seen corresponding path program 2 times [2020-10-29 09:36:43,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:43,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179728502] [2020-10-29 09:36:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:43,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:43,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:43,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:43,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:44,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:44,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:36:44,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:36:44,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 769 [2020-10-29 09:36:44,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:44,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:44,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:36:44,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:44,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:36:44,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:36:44,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:44,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:44,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:44,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:44,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:44,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:36:44,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:44,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:44,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:44,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:44,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:44,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:36:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:44,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179728502] [2020-10-29 09:36:44,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:44,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:36:44,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366997819] [2020-10-29 09:36:44,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:36:44,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:44,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:36:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:36:44,307 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2020-10-29 09:36:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:44,584 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-29 09:36:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:36:44,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-29 09:36:44,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:44,586 INFO L225 Difference]: With dead ends: 30 [2020-10-29 09:36:44,586 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 09:36:44,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:36:44,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 09:36:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-29 09:36:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:36:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-29 09:36:44,595 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-10-29 09:36:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:44,595 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-29 09:36:44,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:36:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-29 09:36:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:36:44,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:44,597 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:44,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:36:44,597 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:44,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:44,598 INFO L82 PathProgramCache]: Analyzing trace with hash 843136401, now seen corresponding path program 3 times [2020-10-29 09:36:44,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:44,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441382509] [2020-10-29 09:36:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:44,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:44,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:44,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:44,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:45,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:45,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:36:45,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:36:45,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-29 09:36:45,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:45,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:36:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:45,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:36:45,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:36:45,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:45,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:45,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:45,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:45,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:45,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:36:45,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:45,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:45,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:45,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:45,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:45,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:36:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:45,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441382509] [2020-10-29 09:36:45,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:45,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:36:45,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609636872] [2020-10-29 09:36:45,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:36:45,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:45,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:36:45,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:36:45,460 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-10-29 09:36:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:45,679 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-29 09:36:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:36:45,679 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-29 09:36:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:45,680 INFO L225 Difference]: With dead ends: 33 [2020-10-29 09:36:45,680 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:36:45,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:36:45,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:36:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-29 09:36:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:36:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-29 09:36:45,690 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2020-10-29 09:36:45,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:45,690 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-29 09:36:45,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:36:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-29 09:36:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:36:45,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:45,692 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:45,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:36:45,692 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash 58704906, now seen corresponding path program 4 times [2020-10-29 09:36:45,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:45,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977003023] [2020-10-29 09:36:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:45,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:45,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:45,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:45,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:45,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:46,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:48,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:48,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:36:48,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:36:48,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3076 [2020-10-29 09:36:48,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:48,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:48,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:36:48,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:48,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:36:48,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:48,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:48,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:48,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:48,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:48,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:48,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:36:48,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:48,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:48,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:48,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:48,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:48,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:36:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:48,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977003023] [2020-10-29 09:36:48,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:48,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:36:48,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233233692] [2020-10-29 09:36:48,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:36:48,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:48,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:36:48,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:36:48,917 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-10-29 09:36:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:49,183 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-29 09:36:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:36:49,183 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-29 09:36:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:49,184 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:36:49,185 INFO L226 Difference]: Without dead ends: 30 [2020-10-29 09:36:49,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:36:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-29 09:36:49,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-29 09:36:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:36:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-29 09:36:49,195 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2020-10-29 09:36:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:49,195 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-29 09:36:49,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:36:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-29 09:36:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:36:49,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:49,196 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:49,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:36:49,197 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:49,198 INFO L82 PathProgramCache]: Analyzing trace with hash -22905103, now seen corresponding path program 5 times [2020-10-29 09:36:49,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:49,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476347109] [2020-10-29 09:36:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:49,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:49,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:49,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:49,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:49,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:49,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:53,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:53,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:36:53,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:36:53,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4040 [2020-10-29 09:36:53,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:53,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:53,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:36:53,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:53,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:36:53,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:36:53,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:53,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:53,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:53,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:53,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:53,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:36:53,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:53,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:53,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:53,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:53,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:53,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:36:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:53,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476347109] [2020-10-29 09:36:53,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:53,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:36:53,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305084651] [2020-10-29 09:36:53,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:36:53,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:53,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:36:53,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:36:53,434 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-29 09:36:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:53,816 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-29 09:36:53,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:36:53,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-29 09:36:53,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:53,818 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:36:53,819 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:36:53,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:36:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:36:53,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-29 09:36:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:36:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-29 09:36:53,834 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 27 [2020-10-29 09:36:53,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:53,835 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-29 09:36:53,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:36:53,835 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-29 09:36:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:36:53,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:53,838 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:53,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:36:53,838 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:53,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:53,839 INFO L82 PathProgramCache]: Analyzing trace with hash -315193686, now seen corresponding path program 6 times [2020-10-29 09:36:53,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:53,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457782594] [2020-10-29 09:36:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:53,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:53,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:53,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:53,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:53,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:53,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:54,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:55,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:58,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:58,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:36:58,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:36:58,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 09:36:58,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:58,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:58,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:36:58,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:58,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:36:58,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:59,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:59,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:59,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:59,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:59,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:59,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:36:59,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:59,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:59,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:59,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:59,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:59,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:59,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457782594] [2020-10-29 09:36:59,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:59,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:36:59,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866652988] [2020-10-29 09:36:59,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:36:59,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:59,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:36:59,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:36:59,056 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 10 states. [2020-10-29 09:36:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:59,492 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-29 09:36:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:36:59,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-29 09:36:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:59,493 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:36:59,494 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:36:59,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:36:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:36:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-29 09:36:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:36:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-29 09:36:59,513 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 30 [2020-10-29 09:36:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:59,514 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-29 09:36:59,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:36:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-29 09:36:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:36:59,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:59,518 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:59,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:36:59,519 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1985660847, now seen corresponding path program 7 times [2020-10-29 09:36:59,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:59,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731058248] [2020-10-29 09:36:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:59,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:59,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:59,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:59,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:59,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:59,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:59,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:04,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:04,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:37:04,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:37:04,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 09:37:04,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:04,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:04,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:37:04,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:37:04,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:04,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:04,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:04,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:04,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:04,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:04,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:04,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:04,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:04,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:04,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:04,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:04,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:04,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731058248] [2020-10-29 09:37:04,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:04,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:37:04,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248048935] [2020-10-29 09:37:04,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:37:04,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:04,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:37:04,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:37:04,719 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 11 states. [2020-10-29 09:37:05,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:05,241 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2020-10-29 09:37:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:37:05,242 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-29 09:37:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:05,243 INFO L225 Difference]: With dead ends: 45 [2020-10-29 09:37:05,243 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:37:05,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:37:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:37:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-29 09:37:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:37:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-29 09:37:05,262 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 33 [2020-10-29 09:37:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:05,262 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-29 09:37:05,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:37:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-29 09:37:05,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:37:05,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:05,264 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:05,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:37:05,264 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:05,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:05,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1086795446, now seen corresponding path program 8 times [2020-10-29 09:37:05,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:05,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401828635] [2020-10-29 09:37:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:05,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:05,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:05,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:05,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:05,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:05,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:05,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:05,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:05,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:10,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:10,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:37:10,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:37:10,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:37:10,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:10,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:37:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:37:10,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:10,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:10,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:10,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:10,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:10,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:10,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:37:10,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:10,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:10,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:10,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:10,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:10,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:10,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401828635] [2020-10-29 09:37:10,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:10,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:37:10,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398969101] [2020-10-29 09:37:10,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:37:10,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:10,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:37:10,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:37:10,516 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 12 states. [2020-10-29 09:37:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:11,206 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-10-29 09:37:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:37:11,207 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-29 09:37:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:11,208 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:37:11,208 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 09:37:11,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:37:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 09:37:11,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-29 09:37:11,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:37:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-29 09:37:11,222 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 36 [2020-10-29 09:37:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:11,223 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-29 09:37:11,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:37:11,223 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-29 09:37:11,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:37:11,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:11,224 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:11,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:37:11,225 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:11,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:11,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2108724815, now seen corresponding path program 9 times [2020-10-29 09:37:11,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:11,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108168903] [2020-10-29 09:37:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:11,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:11,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:11,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:11,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:11,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:11,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:11,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:11,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:11,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:12,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:16,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:16,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:37:16,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 09:37:16,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:37:16,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:16,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:16,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:37:16,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:16,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:37:16,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:16,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:16,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:16,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:16,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:16,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:16,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:16,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:16,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:16,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:16,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:16,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:16,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:16,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108168903] [2020-10-29 09:37:16,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:16,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:37:16,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876366911] [2020-10-29 09:37:16,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:37:16,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:37:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:37:16,496 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 13 states. [2020-10-29 09:37:17,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:17,317 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-29 09:37:17,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:37:17,318 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-29 09:37:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:17,319 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:37:17,319 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:37:17,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:37:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:37:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-29 09:37:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:37:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-29 09:37:17,331 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2020-10-29 09:37:17,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:17,332 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-29 09:37:17,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:37:17,332 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-29 09:37:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:37:17,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:17,333 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:17,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:37:17,333 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:17,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:17,334 INFO L82 PathProgramCache]: Analyzing trace with hash 616604650, now seen corresponding path program 10 times [2020-10-29 09:37:17,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:17,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574636507] [2020-10-29 09:37:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:17,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:17,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:17,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:17,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:17,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:17,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:17,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:17,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:17,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:18,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:18,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:22,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:22,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:37:22,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 09:37:22,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:37:22,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:22,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:22,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:37:22,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:22,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:37:22,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:22,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:22,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:22,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:22,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:22,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:22,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:22,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:22,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:22,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:22,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:22,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:22,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:22,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574636507] [2020-10-29 09:37:22,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:22,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:37:22,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725799355] [2020-10-29 09:37:22,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:37:22,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:22,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:37:22,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:37:22,605 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 14 states. [2020-10-29 09:37:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:23,555 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-29 09:37:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:37:23,556 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-29 09:37:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:23,558 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:37:23,558 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 09:37:23,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:37:23,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 09:37:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-29 09:37:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:37:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-29 09:37:23,572 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 42 [2020-10-29 09:37:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:23,572 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-29 09:37:23,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:37:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-29 09:37:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:37:23,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:23,574 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:23,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:37:23,574 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:23,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:23,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1155067119, now seen corresponding path program 11 times [2020-10-29 09:37:23,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:23,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649730606] [2020-10-29 09:37:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:23,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:23,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:23,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:23,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:23,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:23,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:23,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:23,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:23,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:24,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:24,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:24,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:28,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:28,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:37:28,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 09:37:28,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:37:28,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:28,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:28,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:37:28,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:28,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:37:28,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:28,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:28,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:28,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:28,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:28,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:28,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:28,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:28,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:28,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:28,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:28,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:28,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:28,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649730606] [2020-10-29 09:37:28,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:28,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:37:28,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453450785] [2020-10-29 09:37:28,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:37:28,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:28,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:37:28,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:37:28,882 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 15 states. [2020-10-29 09:37:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:29,918 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-10-29 09:37:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:37:29,919 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-29 09:37:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:29,920 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:37:29,920 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:37:29,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:37:29,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:37:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-29 09:37:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:37:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-29 09:37:29,935 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 45 [2020-10-29 09:37:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:29,935 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-29 09:37:29,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:37:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-29 09:37:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:37:29,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:29,937 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:29,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:37:29,937 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:29,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:29,938 INFO L82 PathProgramCache]: Analyzing trace with hash -175636854, now seen corresponding path program 12 times [2020-10-29 09:37:29,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:29,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700101570] [2020-10-29 09:37:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:29,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:29,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:29,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:29,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:30,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:30,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:30,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:30,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:30,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:30,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:30,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:32,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:34,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:34,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:37:34,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 09:37:34,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:37:34,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:34,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:37:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:37:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:37:34,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:35,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:35,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:35,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:35,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:35,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:35,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:35,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:35,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:35,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:35,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:35,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:35,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-29 09:37:35,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700101570] [2020-10-29 09:37:35,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:37:35,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:37:35,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046820446] [2020-10-29 09:37:35,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:37:35,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:35,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:37:35,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:37:35,044 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 4 states. [2020-10-29 09:37:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:35,122 INFO L93 Difference]: Finished difference Result 102 states and 137 transitions. [2020-10-29 09:37:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:37:35,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-29 09:37:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:35,124 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:37:35,124 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:37:35,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:37:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:37:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-29 09:37:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:37:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-10-29 09:37:35,144 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 48 [2020-10-29 09:37:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:35,144 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-10-29 09:37:35,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:37:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-10-29 09:37:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:37:35,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:35,146 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:35,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:37:35,146 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:35,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:35,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2049295358, now seen corresponding path program 1 times [2020-10-29 09:37:35,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:35,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375971112] [2020-10-29 09:37:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:35,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:35,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:35,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:35,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:35,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:35,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:35,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:35,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:35,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:40,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:40,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:37:40,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:37:40,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 09:37:40,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:40,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:40,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:37:40,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-29 09:37:40,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:37:40,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:40,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:40,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:40,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:40,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:40,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:40,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:40,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:40,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:40,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:40,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:40,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:40,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 208 proven. 1 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-10-29 09:37:40,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375971112] [2020-10-29 09:37:40,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:40,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:37:40,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995088439] [2020-10-29 09:37:40,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:37:40,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:40,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:37:40,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:37:40,261 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 5 states. [2020-10-29 09:37:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:40,386 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2020-10-29 09:37:40,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:37:40,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-10-29 09:37:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:40,388 INFO L225 Difference]: With dead ends: 125 [2020-10-29 09:37:40,388 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 09:37:40,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:37:40,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 09:37:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-29 09:37:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:37:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-29 09:37:40,415 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 60 [2020-10-29 09:37:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:40,415 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-29 09:37:40,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:37:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-29 09:37:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:37:40,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:40,416 INFO L422 BasicCegarLoop]: trace histogram [24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:40,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:37:40,417 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:40,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:40,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1304051446, now seen corresponding path program 2 times [2020-10-29 09:37:40,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:40,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909800303] [2020-10-29 09:37:40,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:40,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:40,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:40,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:40,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:40,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:40,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:40,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:40,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:42,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:45,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 09:37:45,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:37:45,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 09:37:45,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:45,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:45,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:37:45,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-29 09:37:45,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:37:45,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:45,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:45,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:45,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:45,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:45,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:45,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:45,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:45,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:45,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:45,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:45,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 446 proven. 3 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-10-29 09:37:45,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909800303] [2020-10-29 09:37:45,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:45,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:37:45,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221736641] [2020-10-29 09:37:45,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:37:45,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:37:45,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:37:45,544 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 6 states. [2020-10-29 09:37:45,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:45,758 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2020-10-29 09:37:45,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:37:45,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 09:37:45,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:45,760 INFO L225 Difference]: With dead ends: 148 [2020-10-29 09:37:45,760 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:37:45,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:37:45,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:37:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-29 09:37:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-29 09:37:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-10-29 09:37:45,789 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 72 [2020-10-29 09:37:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:45,789 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-10-29 09:37:45,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:37:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-10-29 09:37:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 09:37:45,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:45,791 INFO L422 BasicCegarLoop]: trace histogram [36, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:45,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:37:45,791 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:45,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:45,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1981679742, now seen corresponding path program 3 times [2020-10-29 09:37:45,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:45,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120119300] [2020-10-29 09:37:45,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:45,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:47,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:50,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:50,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 09:37:50,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:37:50,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 09:37:50,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:50,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:50,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:37:50,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:37:50,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:37:50,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:50,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:50,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:50,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:50,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:50,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:50,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:50,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:50,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:50,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:50,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:50,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:50,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 188 proven. 6 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2020-10-29 09:37:50,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120119300] [2020-10-29 09:37:50,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:50,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:37:50,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890682963] [2020-10-29 09:37:50,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:37:50,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:50,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:37:50,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:37:50,944 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 7 states. [2020-10-29 09:37:51,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:51,175 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2020-10-29 09:37:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:37:51,176 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-29 09:37:51,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:51,177 INFO L225 Difference]: With dead ends: 171 [2020-10-29 09:37:51,177 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 09:37:51,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:37:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 09:37:51,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-29 09:37:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:37:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-10-29 09:37:51,210 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 84 [2020-10-29 09:37:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:51,210 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-10-29 09:37:51,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:37:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-10-29 09:37:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 09:37:51,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:51,212 INFO L422 BasicCegarLoop]: trace histogram [48, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:51,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:37:51,212 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:51,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1186046858, now seen corresponding path program 4 times [2020-10-29 09:37:51,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:51,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113659900] [2020-10-29 09:37:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:51,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:55,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:56,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:56,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 09:37:56,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:37:56,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:37:56,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:56,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:56,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:37:56,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-29 09:37:56,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:37:56,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:56,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:56,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:56,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:56,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:56,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:56,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:56,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:56,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:56,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 1047 proven. 10 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-10-29 09:37:56,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113659900] [2020-10-29 09:37:56,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:56,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:37:56,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536847734] [2020-10-29 09:37:56,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:37:56,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:56,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:37:56,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:37:56,401 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 8 states. [2020-10-29 09:37:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:56,803 INFO L93 Difference]: Finished difference Result 194 states and 229 transitions. [2020-10-29 09:37:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:37:56,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-29 09:37:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:56,805 INFO L225 Difference]: With dead ends: 194 [2020-10-29 09:37:56,805 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 09:37:56,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:37:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 09:37:56,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-29 09:37:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-29 09:37:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-10-29 09:37:56,871 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 96 [2020-10-29 09:37:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:56,872 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-10-29 09:37:56,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:37:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-10-29 09:37:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-29 09:37:56,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:56,874 INFO L422 BasicCegarLoop]: trace histogram [60, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:56,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:37:56,875 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash -97211138, now seen corresponding path program 5 times [2020-10-29 09:37:56,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:56,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771629674] [2020-10-29 09:37:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:56,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:57,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:57,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:57,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:57,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:57,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:57,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:01,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:01,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-29 09:38:01,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:38:01,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 09:38:01,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:01,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:01,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:38:01,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-29 09:38:01,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:38:01,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:02,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:02,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:02,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:02,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:02,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:02,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:02,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:02,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:02,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:02,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:02,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:02,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 1554 proven. 15 refuted. 0 times theorem prover too weak. 1131 trivial. 0 not checked. [2020-10-29 09:38:02,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771629674] [2020-10-29 09:38:02,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:02,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:38:02,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59674213] [2020-10-29 09:38:02,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:38:02,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:02,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:38:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:38:02,088 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 9 states. [2020-10-29 09:38:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:02,426 INFO L93 Difference]: Finished difference Result 217 states and 252 transitions. [2020-10-29 09:38:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:38:02,427 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 108 [2020-10-29 09:38:02,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:02,428 INFO L225 Difference]: With dead ends: 217 [2020-10-29 09:38:02,428 INFO L226 Difference]: Without dead ends: 121 [2020-10-29 09:38:02,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:38:02,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-29 09:38:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-29 09:38:02,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 09:38:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2020-10-29 09:38:02,470 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 108 [2020-10-29 09:38:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:02,470 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2020-10-29 09:38:02,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:38:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2020-10-29 09:38:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-29 09:38:02,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:02,471 INFO L422 BasicCegarLoop]: trace histogram [72, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:02,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:38:02,472 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:02,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:02,472 INFO L82 PathProgramCache]: Analyzing trace with hash -990140918, now seen corresponding path program 6 times [2020-10-29 09:38:02,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:02,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246033587] [2020-10-29 09:38:02,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:02,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:02,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:02,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:02,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:02,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:02,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:02,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:07,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:07,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 09:38:07,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:38:07,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 09:38:07,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:07,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:07,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:38:07,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-29 09:38:07,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:38:07,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:07,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:07,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:07,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:07,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:07,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:07,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:07,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:07,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:07,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:07,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:07,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:07,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3630 backedges. 2087 proven. 21 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2020-10-29 09:38:07,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246033587] [2020-10-29 09:38:07,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:07,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:38:07,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938364982] [2020-10-29 09:38:07,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:38:07,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:07,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:38:07,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:38:07,718 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand 10 states. [2020-10-29 09:38:08,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:08,157 INFO L93 Difference]: Finished difference Result 240 states and 275 transitions. [2020-10-29 09:38:08,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:38:08,157 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 120 [2020-10-29 09:38:08,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:08,158 INFO L225 Difference]: With dead ends: 240 [2020-10-29 09:38:08,158 INFO L226 Difference]: Without dead ends: 133 [2020-10-29 09:38:08,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:38:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-29 09:38:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-29 09:38:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 09:38:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2020-10-29 09:38:08,205 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 120 [2020-10-29 09:38:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:08,206 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2020-10-29 09:38:08,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:38:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2020-10-29 09:38:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-29 09:38:08,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:08,210 INFO L422 BasicCegarLoop]: trace histogram [84, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:08,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:38:08,211 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:08,211 INFO L82 PathProgramCache]: Analyzing trace with hash -243682946, now seen corresponding path program 7 times [2020-10-29 09:38:08,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:08,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802777612] [2020-10-29 09:38:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:08,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:08,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:08,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:08,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:08,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:08,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:08,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:13,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:13,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-29 09:38:13,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:38:13,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-29 09:38:13,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:13,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:13,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:38:13,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-29 09:38:13,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:38:13,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:13,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:13,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:13,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:13,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:13,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:13,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:13,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:13,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:13,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2701 proven. 28 refuted. 0 times theorem prover too weak. 1975 trivial. 0 not checked. [2020-10-29 09:38:13,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802777612] [2020-10-29 09:38:13,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:13,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:38:13,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815337493] [2020-10-29 09:38:13,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:38:13,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:13,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:38:13,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:38:13,501 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand 11 states. [2020-10-29 09:38:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:13,965 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2020-10-29 09:38:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:38:13,966 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2020-10-29 09:38:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:13,967 INFO L225 Difference]: With dead ends: 263 [2020-10-29 09:38:13,967 INFO L226 Difference]: Without dead ends: 145 [2020-10-29 09:38:13,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:38:13,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-29 09:38:14,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-29 09:38:14,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-29 09:38:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2020-10-29 09:38:14,009 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 132 [2020-10-29 09:38:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:14,009 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2020-10-29 09:38:14,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:38:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2020-10-29 09:38:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-29 09:38:14,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:14,011 INFO L422 BasicCegarLoop]: trace histogram [96, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:14,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:38:14,012 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:14,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:14,012 INFO L82 PathProgramCache]: Analyzing trace with hash -447494006, now seen corresponding path program 8 times [2020-10-29 09:38:14,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:14,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687561222] [2020-10-29 09:38:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:14,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:14,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:14,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:14,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:14,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:14,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:14,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:19,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:19,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-29 09:38:19,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:38:19,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 09:38:19,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:19,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:19,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:38:19,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 09:38:19,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:38:19,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:19,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:19,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:19,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:19,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:19,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:19,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:19,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:19,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:19,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:19,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:19,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:19,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 1734 proven. 36 refuted. 0 times theorem prover too weak. 4152 trivial. 0 not checked. [2020-10-29 09:38:19,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687561222] [2020-10-29 09:38:19,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:19,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:38:19,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528842469] [2020-10-29 09:38:19,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:38:19,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:19,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:38:19,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:38:19,306 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand 12 states. [2020-10-29 09:38:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:19,874 INFO L93 Difference]: Finished difference Result 286 states and 321 transitions. [2020-10-29 09:38:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:38:19,875 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 144 [2020-10-29 09:38:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:19,877 INFO L225 Difference]: With dead ends: 286 [2020-10-29 09:38:19,877 INFO L226 Difference]: Without dead ends: 157 [2020-10-29 09:38:19,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:38:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-29 09:38:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-29 09:38:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-29 09:38:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 169 transitions. [2020-10-29 09:38:19,917 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 169 transitions. Word has length 144 [2020-10-29 09:38:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:19,918 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 169 transitions. [2020-10-29 09:38:19,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:38:19,918 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 169 transitions. [2020-10-29 09:38:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-29 09:38:19,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:19,920 INFO L422 BasicCegarLoop]: trace histogram [108, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:19,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:38:19,920 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:19,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1057155586, now seen corresponding path program 9 times [2020-10-29 09:38:19,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:19,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447607197] [2020-10-29 09:38:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:20,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:20,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:20,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:20,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:20,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:20,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:20,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:24,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:24,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-29 09:38:24,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:38:24,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 09:38:24,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:24,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:38:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-29 09:38:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:38:24,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:25,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:25,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:25,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:25,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:25,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:25,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:25,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:25,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:25,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:25,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:25,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:25,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7284 backedges. 3972 proven. 45 refuted. 0 times theorem prover too weak. 3267 trivial. 0 not checked. [2020-10-29 09:38:25,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447607197] [2020-10-29 09:38:25,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:25,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:38:25,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739156859] [2020-10-29 09:38:25,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:38:25,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:25,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:38:25,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:38:25,234 INFO L87 Difference]: Start difference. First operand 157 states and 169 transitions. Second operand 13 states. [2020-10-29 09:38:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:25,853 INFO L93 Difference]: Finished difference Result 309 states and 344 transitions. [2020-10-29 09:38:25,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:38:25,856 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 156 [2020-10-29 09:38:25,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:25,857 INFO L225 Difference]: With dead ends: 309 [2020-10-29 09:38:25,858 INFO L226 Difference]: Without dead ends: 169 [2020-10-29 09:38:25,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:38:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-29 09:38:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-29 09:38:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-29 09:38:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 181 transitions. [2020-10-29 09:38:25,898 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 181 transitions. Word has length 156 [2020-10-29 09:38:25,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:25,899 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 181 transitions. [2020-10-29 09:38:25,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:38:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 181 transitions. [2020-10-29 09:38:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-29 09:38:25,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:25,901 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:25,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:38:25,901 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:25,902 INFO L82 PathProgramCache]: Analyzing trace with hash 99224330, now seen corresponding path program 10 times [2020-10-29 09:38:25,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:25,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784900727] [2020-10-29 09:38:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:25,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:27,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:27,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:27,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-29 09:38:27,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:38:27,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1600 [2020-10-29 09:38:27,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:27,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:27,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:38:27,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:27,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-29 09:38:27,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:27,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:27,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:27,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:27,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:27,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:27,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:27,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:27,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:27,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:27,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:27,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:27,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-29 09:38:27,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784900727] [2020-10-29 09:38:27,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:27,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:38:27,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519642308] [2020-10-29 09:38:27,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:38:27,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:27,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:38:27,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:38:27,954 INFO L87 Difference]: Start difference. First operand 169 states and 181 transitions. Second operand 16 states. [2020-10-29 09:38:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:29,196 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2020-10-29 09:38:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:38:29,197 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 168 [2020-10-29 09:38:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:29,199 INFO L225 Difference]: With dead ends: 200 [2020-10-29 09:38:29,199 INFO L226 Difference]: Without dead ends: 194 [2020-10-29 09:38:29,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:38:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-29 09:38:29,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 182. [2020-10-29 09:38:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-29 09:38:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 195 transitions. [2020-10-29 09:38:29,255 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 195 transitions. Word has length 168 [2020-10-29 09:38:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:29,256 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 195 transitions. [2020-10-29 09:38:29,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:38:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 195 transitions. [2020-10-29 09:38:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-29 09:38:29,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:29,259 INFO L422 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:29,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:38:29,259 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:29,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:29,260 INFO L82 PathProgramCache]: Analyzing trace with hash 279090417, now seen corresponding path program 11 times [2020-10-29 09:38:29,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:29,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521294787] [2020-10-29 09:38:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:29,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:31,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:31,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-29 09:38:31,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:31,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1892 [2020-10-29 09:38:31,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:31,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:31,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:38:31,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:31,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-29 09:38:31,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:31,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:31,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:31,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:31,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:31,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:31,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:31,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:31,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:31,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:31,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:31,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-29 09:38:31,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521294787] [2020-10-29 09:38:31,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:31,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:38:31,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674225786] [2020-10-29 09:38:31,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:38:31,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:31,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:38:31,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:38:31,648 INFO L87 Difference]: Start difference. First operand 182 states and 195 transitions. Second operand 17 states. [2020-10-29 09:38:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:33,093 INFO L93 Difference]: Finished difference Result 213 states and 228 transitions. [2020-10-29 09:38:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:38:33,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 181 [2020-10-29 09:38:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:33,095 INFO L225 Difference]: With dead ends: 213 [2020-10-29 09:38:33,096 INFO L226 Difference]: Without dead ends: 207 [2020-10-29 09:38:33,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:38:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-29 09:38:33,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 195. [2020-10-29 09:38:33,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-29 09:38:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-10-29 09:38:33,148 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 181 [2020-10-29 09:38:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:33,148 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-10-29 09:38:33,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:38:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-10-29 09:38:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-29 09:38:33,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:33,150 INFO L422 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:33,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:38:33,150 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1326343574, now seen corresponding path program 12 times [2020-10-29 09:38:33,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:33,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175394233] [2020-10-29 09:38:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:33,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:34,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:36,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:36,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-29 09:38:36,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:38:36,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3385 [2020-10-29 09:38:36,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:36,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:36,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:38:36,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:36,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-29 09:38:36,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:37,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:37,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:37,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:37,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:37,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:37,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:38:37,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:37,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:37,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:37,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:37,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:37,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:38:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-29 09:38:37,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175394233] [2020-10-29 09:38:37,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:37,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:38:37,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987679519] [2020-10-29 09:38:37,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:38:37,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:38:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:38:37,245 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 18 states. [2020-10-29 09:38:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:38,776 INFO L93 Difference]: Finished difference Result 226 states and 242 transitions. [2020-10-29 09:38:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:38:38,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 194 [2020-10-29 09:38:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:38,778 INFO L225 Difference]: With dead ends: 226 [2020-10-29 09:38:38,778 INFO L226 Difference]: Without dead ends: 220 [2020-10-29 09:38:38,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:38:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-29 09:38:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2020-10-29 09:38:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-29 09:38:38,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2020-10-29 09:38:38,859 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 194 [2020-10-29 09:38:38,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:38,859 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2020-10-29 09:38:38,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:38:38,860 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2020-10-29 09:38:38,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-29 09:38:38,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:38,862 INFO L422 BasicCegarLoop]: trace histogram [150, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:38,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:38:38,862 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:38,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:38,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1606877585, now seen corresponding path program 13 times [2020-10-29 09:38:38,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:38,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589705859] [2020-10-29 09:38:38,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:39,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:41,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:41,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-29 09:38:41,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:41,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2507 [2020-10-29 09:38:41,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:41,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:41,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:38:41,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:41,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-29 09:38:41,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:41,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:41,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:41,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:41,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:41,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:41,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:41,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:41,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:41,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:41,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:41,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:41,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 0 proven. 12930 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2020-10-29 09:38:42,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589705859] [2020-10-29 09:38:42,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:42,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:38:42,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846992319] [2020-10-29 09:38:42,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:38:42,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:42,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:38:42,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:38:42,026 INFO L87 Difference]: Start difference. First operand 208 states and 223 transitions. Second operand 19 states. [2020-10-29 09:38:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:43,693 INFO L93 Difference]: Finished difference Result 239 states and 256 transitions. [2020-10-29 09:38:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:38:43,693 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 207 [2020-10-29 09:38:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:43,695 INFO L225 Difference]: With dead ends: 239 [2020-10-29 09:38:43,695 INFO L226 Difference]: Without dead ends: 233 [2020-10-29 09:38:43,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:38:43,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-29 09:38:43,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2020-10-29 09:38:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-29 09:38:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 237 transitions. [2020-10-29 09:38:43,758 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 237 transitions. Word has length 207 [2020-10-29 09:38:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:43,758 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 237 transitions. [2020-10-29 09:38:43,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:38:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 237 transitions. [2020-10-29 09:38:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-29 09:38:43,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:43,760 INFO L422 BasicCegarLoop]: trace histogram [160, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:43,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:38:43,760 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:43,761 INFO L82 PathProgramCache]: Analyzing trace with hash -671436342, now seen corresponding path program 14 times [2020-10-29 09:38:43,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:43,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756919882] [2020-10-29 09:38:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:43,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:46,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:47,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:47,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-29 09:38:47,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:38:47,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3183 [2020-10-29 09:38:47,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:47,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:38:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:47,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-29 09:38:47,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:47,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:47,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:47,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:47,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:47,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:47,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:47,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:47,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:47,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-10-29 09:38:47,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756919882] [2020-10-29 09:38:47,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:47,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:38:47,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847230711] [2020-10-29 09:38:47,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:38:47,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:47,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:38:47,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:38:47,592 INFO L87 Difference]: Start difference. First operand 221 states and 237 transitions. Second operand 20 states. [2020-10-29 09:38:49,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:49,436 INFO L93 Difference]: Finished difference Result 252 states and 270 transitions. [2020-10-29 09:38:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:38:49,436 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 220 [2020-10-29 09:38:49,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:49,439 INFO L225 Difference]: With dead ends: 252 [2020-10-29 09:38:49,440 INFO L226 Difference]: Without dead ends: 246 [2020-10-29 09:38:49,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:38:49,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-29 09:38:49,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 234. [2020-10-29 09:38:49,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-29 09:38:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 251 transitions. [2020-10-29 09:38:49,502 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 251 transitions. Word has length 220 [2020-10-29 09:38:49,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:49,502 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 251 transitions. [2020-10-29 09:38:49,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:38:49,503 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 251 transitions. [2020-10-29 09:38:49,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-29 09:38:49,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:49,504 INFO L422 BasicCegarLoop]: trace histogram [170, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:49,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:38:49,504 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:49,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1336337969, now seen corresponding path program 15 times [2020-10-29 09:38:49,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:49,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242401019] [2020-10-29 09:38:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:49,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:52,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:52,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-29 09:38:52,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:52,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3324 [2020-10-29 09:38:52,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:52,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:38:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-10-29 09:38:52,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:53,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:53,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:53,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:53,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:53,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:53,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:53,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:53,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:53,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:53,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:53,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:53,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 16745 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2020-10-29 09:38:53,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242401019] [2020-10-29 09:38:53,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:53,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:38:53,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082460280] [2020-10-29 09:38:53,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:38:53,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:38:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:38:53,524 INFO L87 Difference]: Start difference. First operand 234 states and 251 transitions. Second operand 21 states. [2020-10-29 09:38:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:55,521 INFO L93 Difference]: Finished difference Result 265 states and 284 transitions. [2020-10-29 09:38:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:38:55,521 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 233 [2020-10-29 09:38:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:55,524 INFO L225 Difference]: With dead ends: 265 [2020-10-29 09:38:55,524 INFO L226 Difference]: Without dead ends: 259 [2020-10-29 09:38:55,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:38:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-29 09:38:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 247. [2020-10-29 09:38:55,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-29 09:38:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 265 transitions. [2020-10-29 09:38:55,599 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 265 transitions. Word has length 233 [2020-10-29 09:38:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:55,600 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 265 transitions. [2020-10-29 09:38:55,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:38:55,600 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 265 transitions. [2020-10-29 09:38:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-29 09:38:55,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:55,602 INFO L422 BasicCegarLoop]: trace histogram [180, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:55,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:38:55,602 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:55,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1666494166, now seen corresponding path program 16 times [2020-10-29 09:38:55,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:55,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794337678] [2020-10-29 09:38:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:55,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:59,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:00,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:00,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-29 09:39:00,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:39:00,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 09:39:00,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:00,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:00,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:39:00,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:00,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 236 [2020-10-29 09:39:00,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:01,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:01,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:01,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:01,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:01,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:01,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:01,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:01,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:01,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:01,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:01,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:01,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-29 09:39:01,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794337678] [2020-10-29 09:39:01,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:01,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:39:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143789728] [2020-10-29 09:39:01,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:39:01,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:39:01,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:39:01,368 INFO L87 Difference]: Start difference. First operand 247 states and 265 transitions. Second operand 22 states. [2020-10-29 09:39:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:03,559 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2020-10-29 09:39:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:39:03,559 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 246 [2020-10-29 09:39:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:03,561 INFO L225 Difference]: With dead ends: 278 [2020-10-29 09:39:03,561 INFO L226 Difference]: Without dead ends: 272 [2020-10-29 09:39:03,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:39:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-29 09:39:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 260. [2020-10-29 09:39:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-29 09:39:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 279 transitions. [2020-10-29 09:39:03,639 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 279 transitions. Word has length 246 [2020-10-29 09:39:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:03,639 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 279 transitions. [2020-10-29 09:39:03,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:39:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 279 transitions. [2020-10-29 09:39:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-29 09:39:03,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:03,641 INFO L422 BasicCegarLoop]: trace histogram [190, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:03,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:39:03,642 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash 475808465, now seen corresponding path program 17 times [2020-10-29 09:39:03,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:03,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756932421] [2020-10-29 09:39:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:03,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:08,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:08,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-29 09:39:08,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:08,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4351 [2020-10-29 09:39:08,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:08,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:08,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:39:08,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:08,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 249 [2020-10-29 09:39:08,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:08,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:08,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:08,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:08,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:08,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:08,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:08,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:08,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:08,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:08,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:08,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2020-10-29 09:39:08,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756932421] [2020-10-29 09:39:08,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:08,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:39:08,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820022671] [2020-10-29 09:39:08,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:39:08,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:08,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:39:08,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:39:08,860 INFO L87 Difference]: Start difference. First operand 260 states and 279 transitions. Second operand 23 states. [2020-10-29 09:39:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:11,356 INFO L93 Difference]: Finished difference Result 291 states and 312 transitions. [2020-10-29 09:39:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:39:11,357 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 259 [2020-10-29 09:39:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:11,359 INFO L225 Difference]: With dead ends: 291 [2020-10-29 09:39:11,359 INFO L226 Difference]: Without dead ends: 285 [2020-10-29 09:39:11,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:39:11,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-29 09:39:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 273. [2020-10-29 09:39:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-29 09:39:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 293 transitions. [2020-10-29 09:39:11,440 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 293 transitions. Word has length 259 [2020-10-29 09:39:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:11,441 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 293 transitions. [2020-10-29 09:39:11,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:39:11,441 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 293 transitions. [2020-10-29 09:39:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-29 09:39:11,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:11,443 INFO L422 BasicCegarLoop]: trace histogram [200, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:11,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:39:11,443 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:11,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:11,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1121355638, now seen corresponding path program 18 times [2020-10-29 09:39:11,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:11,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432737128] [2020-10-29 09:39:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:11,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:14,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:16,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:16,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-29 09:39:16,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:39:16,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-29 09:39:16,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:16,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:16,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:39:16,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:16,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 262 [2020-10-29 09:39:16,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:17,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:17,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:17,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:17,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:17,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:17,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:17,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:17,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:17,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:17,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:17,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:17,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-10-29 09:39:17,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432737128] [2020-10-29 09:39:17,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:17,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:39:17,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776746604] [2020-10-29 09:39:17,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:39:17,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:17,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:39:17,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:39:17,454 INFO L87 Difference]: Start difference. First operand 273 states and 293 transitions. Second operand 24 states. [2020-10-29 09:39:20,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:20,084 INFO L93 Difference]: Finished difference Result 304 states and 326 transitions. [2020-10-29 09:39:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:39:20,085 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 272 [2020-10-29 09:39:20,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:20,087 INFO L225 Difference]: With dead ends: 304 [2020-10-29 09:39:20,087 INFO L226 Difference]: Without dead ends: 298 [2020-10-29 09:39:20,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:39:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-29 09:39:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 286. [2020-10-29 09:39:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-29 09:39:20,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 307 transitions. [2020-10-29 09:39:20,178 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 307 transitions. Word has length 272 [2020-10-29 09:39:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:20,179 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 307 transitions. [2020-10-29 09:39:20,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:39:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 307 transitions. [2020-10-29 09:39:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-29 09:39:20,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:20,181 INFO L422 BasicCegarLoop]: trace histogram [210, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:20,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:39:20,182 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:20,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:20,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1249831055, now seen corresponding path program 19 times [2020-10-29 09:39:20,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:20,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773690234] [2020-10-29 09:39:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:20,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:25,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:25,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-29 09:39:25,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:25,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-29 09:39:25,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:25,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:25,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:39:25,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:25,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 275 [2020-10-29 09:39:25,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:26,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:26,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:26,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:26,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:26,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:26,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:26,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:26,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:26,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:26,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:26,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:26,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-29 09:39:26,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773690234] [2020-10-29 09:39:26,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:26,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:39:26,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758256884] [2020-10-29 09:39:26,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:39:26,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:26,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:39:26,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:39:26,243 INFO L87 Difference]: Start difference. First operand 286 states and 307 transitions. Second operand 25 states. [2020-10-29 09:39:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:29,153 INFO L93 Difference]: Finished difference Result 317 states and 340 transitions. [2020-10-29 09:39:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:39:29,154 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 285 [2020-10-29 09:39:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:29,156 INFO L225 Difference]: With dead ends: 317 [2020-10-29 09:39:29,157 INFO L226 Difference]: Without dead ends: 311 [2020-10-29 09:39:29,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:39:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-29 09:39:29,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 299. [2020-10-29 09:39:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-29 09:39:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 321 transitions. [2020-10-29 09:39:29,247 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 321 transitions. Word has length 285 [2020-10-29 09:39:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:29,248 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 321 transitions. [2020-10-29 09:39:29,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:39:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 321 transitions. [2020-10-29 09:39:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-29 09:39:29,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:29,250 INFO L422 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:29,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:39:29,250 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:29,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:29,250 INFO L82 PathProgramCache]: Analyzing trace with hash -199546902, now seen corresponding path program 20 times [2020-10-29 09:39:29,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:29,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332861740] [2020-10-29 09:39:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:29,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:32,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:34,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:34,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-29 09:39:34,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:39:34,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-29 09:39:34,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:34,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:39:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 288 [2020-10-29 09:39:34,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:35,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:35,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:35,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:35,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:35,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:35,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:35,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:35,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:35,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:35,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:35,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:35,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-10-29 09:39:35,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332861740] [2020-10-29 09:39:35,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:35,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:39:35,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434950102] [2020-10-29 09:39:35,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:39:35,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:35,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:39:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:39:35,356 INFO L87 Difference]: Start difference. First operand 299 states and 321 transitions. Second operand 26 states. [2020-10-29 09:39:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:38,459 INFO L93 Difference]: Finished difference Result 330 states and 354 transitions. [2020-10-29 09:39:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:39:38,459 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 298 [2020-10-29 09:39:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:38,462 INFO L225 Difference]: With dead ends: 330 [2020-10-29 09:39:38,462 INFO L226 Difference]: Without dead ends: 324 [2020-10-29 09:39:38,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:39:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-29 09:39:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 312. [2020-10-29 09:39:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-29 09:39:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 335 transitions. [2020-10-29 09:39:38,552 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 335 transitions. Word has length 298 [2020-10-29 09:39:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:38,552 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 335 transitions. [2020-10-29 09:39:38,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:39:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 335 transitions. [2020-10-29 09:39:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-29 09:39:38,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:38,555 INFO L422 BasicCegarLoop]: trace histogram [230, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:38,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:39:38,555 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:38,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1580164113, now seen corresponding path program 21 times [2020-10-29 09:39:38,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:38,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804038332] [2020-10-29 09:39:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:38,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:43,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:43,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-29 09:39:43,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:43,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:39:43,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:43,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:43,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:39:43,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:43,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 301 [2020-10-29 09:39:43,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:44,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:44,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:44,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:44,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:44,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:44,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:44,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:44,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:44,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:44,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:44,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:44,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-29 09:39:44,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804038332] [2020-10-29 09:39:44,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:44,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:39:44,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705622627] [2020-10-29 09:39:44,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:39:44,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:44,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:39:44,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:39:44,639 INFO L87 Difference]: Start difference. First operand 312 states and 335 transitions. Second operand 27 states. [2020-10-29 09:39:48,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:48,027 INFO L93 Difference]: Finished difference Result 343 states and 368 transitions. [2020-10-29 09:39:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:39:48,027 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 311 [2020-10-29 09:39:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:48,029 INFO L225 Difference]: With dead ends: 343 [2020-10-29 09:39:48,029 INFO L226 Difference]: Without dead ends: 337 [2020-10-29 09:39:48,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:39:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-29 09:39:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 325. [2020-10-29 09:39:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-29 09:39:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 349 transitions. [2020-10-29 09:39:48,134 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 349 transitions. Word has length 311 [2020-10-29 09:39:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:48,134 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 349 transitions. [2020-10-29 09:39:48,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:39:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 349 transitions. [2020-10-29 09:39:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-29 09:39:48,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:48,137 INFO L422 BasicCegarLoop]: trace histogram [240, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:48,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:39:48,137 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1487298378, now seen corresponding path program 22 times [2020-10-29 09:39:48,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:48,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901652820] [2020-10-29 09:39:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:48,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:53,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:53,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-29 09:39:53,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:53,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5133 [2020-10-29 09:39:53,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:53,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:53,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:39:53,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:53,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 314 [2020-10-29 09:39:53,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:54,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:54,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:54,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:54,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:54,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:54,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:54,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:54,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:54,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:54,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:54,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:54,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2020-10-29 09:39:54,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901652820] [2020-10-29 09:39:54,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:54,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:39:54,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623432921] [2020-10-29 09:39:54,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:39:54,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:54,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:39:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:39:54,407 INFO L87 Difference]: Start difference. First operand 325 states and 349 transitions. Second operand 28 states. [2020-10-29 09:39:58,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:58,047 INFO L93 Difference]: Finished difference Result 356 states and 382 transitions. [2020-10-29 09:39:58,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:39:58,047 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 324 [2020-10-29 09:39:58,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:58,050 INFO L225 Difference]: With dead ends: 356 [2020-10-29 09:39:58,050 INFO L226 Difference]: Without dead ends: 350 [2020-10-29 09:39:58,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:39:58,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-29 09:39:58,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 338. [2020-10-29 09:39:58,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-29 09:39:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 363 transitions. [2020-10-29 09:39:58,167 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 363 transitions. Word has length 324 [2020-10-29 09:39:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:58,167 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 363 transitions. [2020-10-29 09:39:58,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:39:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 363 transitions. [2020-10-29 09:39:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-29 09:39:58,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:58,169 INFO L422 BasicCegarLoop]: trace histogram [250, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:58,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:39:58,169 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:58,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1291921585, now seen corresponding path program 23 times [2020-10-29 09:39:58,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:58,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747046030] [2020-10-29 09:39:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:58,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:03,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:03,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-29 09:40:03,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:03,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-29 09:40:03,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:03,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:03,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:40:03,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:03,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 327 [2020-10-29 09:40:03,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:04,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:04,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:04,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:04,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:04,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:04,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:40:04,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:04,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:04,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:04,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:04,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:04,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2020-10-29 09:40:04,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747046030] [2020-10-29 09:40:04,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:04,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:40:04,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539746923] [2020-10-29 09:40:04,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:40:04,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:04,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:40:04,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:40:04,450 INFO L87 Difference]: Start difference. First operand 338 states and 363 transitions. Second operand 29 states. [2020-10-29 09:40:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:08,337 INFO L93 Difference]: Finished difference Result 369 states and 396 transitions. [2020-10-29 09:40:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:40:08,337 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 337 [2020-10-29 09:40:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:08,340 INFO L225 Difference]: With dead ends: 369 [2020-10-29 09:40:08,340 INFO L226 Difference]: Without dead ends: 363 [2020-10-29 09:40:08,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:40:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-29 09:40:08,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 351. [2020-10-29 09:40:08,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-29 09:40:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 377 transitions. [2020-10-29 09:40:08,445 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 377 transitions. Word has length 337 [2020-10-29 09:40:08,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:08,445 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 377 transitions. [2020-10-29 09:40:08,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:40:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 377 transitions. [2020-10-29 09:40:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-29 09:40:08,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:08,448 INFO L422 BasicCegarLoop]: trace histogram [260, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:08,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:40:08,448 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:08,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:08,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1099882838, now seen corresponding path program 24 times [2020-10-29 09:40:08,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:08,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520035073] [2020-10-29 09:40:08,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:08,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:13,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:13,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-29 09:40:13,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:13,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5106 [2020-10-29 09:40:13,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:13,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:13,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:40:13,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:13,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 340 [2020-10-29 09:40:13,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:14,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:14,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:14,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:14,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:14,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:14,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:40:14,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:14,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:14,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:14,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:14,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:14,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 41431 backedges. 0 proven. 40001 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2020-10-29 09:40:14,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520035073] [2020-10-29 09:40:14,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:14,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:40:14,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681783818] [2020-10-29 09:40:14,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:40:14,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:14,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:40:14,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:40:14,826 INFO L87 Difference]: Start difference. First operand 351 states and 377 transitions. Second operand 30 states. [2020-10-29 09:40:18,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:18,995 INFO L93 Difference]: Finished difference Result 382 states and 410 transitions. [2020-10-29 09:40:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:40:18,995 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 350 [2020-10-29 09:40:18,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:18,998 INFO L225 Difference]: With dead ends: 382 [2020-10-29 09:40:18,998 INFO L226 Difference]: Without dead ends: 376 [2020-10-29 09:40:19,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:40:19,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-29 09:40:19,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 364. [2020-10-29 09:40:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-29 09:40:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 391 transitions. [2020-10-29 09:40:19,154 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 391 transitions. Word has length 350 [2020-10-29 09:40:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:19,154 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 391 transitions. [2020-10-29 09:40:19,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:40:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 391 transitions. [2020-10-29 09:40:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-29 09:40:19,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:19,157 INFO L422 BasicCegarLoop]: trace histogram [270, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:19,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:40:19,157 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:19,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1276142929, now seen corresponding path program 25 times [2020-10-29 09:40:19,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:19,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639304270] [2020-10-29 09:40:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:19,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:24,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:24,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-29 09:40:24,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:24,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-29 09:40:24,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:24,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:24,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:40:24,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:24,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 353 [2020-10-29 09:40:24,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:25,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:25,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:25,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:25,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:25,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:25,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:40:25,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:25,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:25,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:25,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:25,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:25,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 44685 backedges. 0 proven. 43200 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2020-10-29 09:40:25,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639304270] [2020-10-29 09:40:25,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:25,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:40:25,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813390953] [2020-10-29 09:40:25,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:40:25,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:25,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:40:25,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:40:25,580 INFO L87 Difference]: Start difference. First operand 364 states and 391 transitions. Second operand 31 states. [2020-10-29 09:40:30,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:30,038 INFO L93 Difference]: Finished difference Result 395 states and 424 transitions. [2020-10-29 09:40:30,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:40:30,038 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 363 [2020-10-29 09:40:30,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:30,041 INFO L225 Difference]: With dead ends: 395 [2020-10-29 09:40:30,041 INFO L226 Difference]: Without dead ends: 389 [2020-10-29 09:40:30,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:40:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-29 09:40:30,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 377. [2020-10-29 09:40:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2020-10-29 09:40:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 405 transitions. [2020-10-29 09:40:30,219 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 405 transitions. Word has length 363 [2020-10-29 09:40:30,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:30,219 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 405 transitions. [2020-10-29 09:40:30,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:40:30,220 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 405 transitions. [2020-10-29 09:40:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-29 09:40:30,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:30,223 INFO L422 BasicCegarLoop]: trace histogram [280, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:30,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:40:30,223 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:30,224 INFO L82 PathProgramCache]: Analyzing trace with hash 362898954, now seen corresponding path program 26 times [2020-10-29 09:40:30,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:30,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869294386] [2020-10-29 09:40:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY