/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/compact.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:44:32,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:44:32,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:44:32,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:44:32,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:44:32,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:44:32,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:44:32,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:44:32,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:44:32,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:44:32,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:44:32,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:44:32,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:44:32,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:44:32,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:44:32,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:44:32,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:44:32,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:44:32,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:44:32,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:44:32,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:44:32,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:44:32,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:44:32,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:44:32,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:44:32,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:44:32,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:44:32,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:44:32,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:44:32,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:44:32,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:44:32,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:44:32,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:44:32,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:44:32,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:44:32,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:44:32,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:44:32,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:44:32,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:44:32,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:44:32,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:44:32,253 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:44:32,279 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:44:32,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:44:32,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:44:32,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:44:32,281 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:44:32,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:44:32,282 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:44:32,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:44:32,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:44:32,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:44:32,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:44:32,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:44:32,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:44:32,283 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:44:32,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:44:32,283 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:44:32,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:44:32,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:44:32,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:44:32,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:44:32,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:44:32,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:44:32,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:44:32,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:44:32,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:44:32,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:44:32,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:44:32,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:44:32,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:44:32,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:44:32,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:44:32,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:44:32,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:44:32,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:44:32,692 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:44:32,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/compact.c [2020-10-27 01:44:32,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78fa46166/42dc3ddb9d974812b77a21d8bb3ac8e5/FLAGe69f73371 [2020-10-27 01:44:33,395 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:44:33,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/compact.c [2020-10-27 01:44:33,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78fa46166/42dc3ddb9d974812b77a21d8bb3ac8e5/FLAGe69f73371 [2020-10-27 01:44:33,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78fa46166/42dc3ddb9d974812b77a21d8bb3ac8e5 [2020-10-27 01:44:33,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:44:33,772 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:44:33,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:44:33,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:44:33,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:44:33,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:44:33" (1/1) ... [2020-10-27 01:44:33,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55578a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:44:33, skipping insertion in model container [2020-10-27 01:44:33,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:44:33" (1/1) ... [2020-10-27 01:44:33,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:44:33,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:44:33,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:44:33,987 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:44:34,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:44:34,040 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:44:34,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:44:34 WrapperNode [2020-10-27 01:44:34,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:44:34,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:44:34,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:44:34,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:44:34,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:44:34" (1/1) ... [2020-10-27 01:44:34,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:44:34" (1/1) ... [2020-10-27 01:44:34,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:44:34" (1/1) ... [2020-10-27 01:44:34,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:44:34" (1/1) ... [2020-10-27 01:44:34,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:44:34" (1/1) ... [2020-10-27 01:44:34,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:44:34" (1/1) ... [2020-10-27 01:44:34,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:44:34" (1/1) ... [2020-10-27 01:44:34,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:44:34,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:44:34,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:44:34,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:44:34,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:44:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:44:34,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:44:34,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:44:34,207 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:44:34,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:44:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:44:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:44:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:44:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:44:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 01:44:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:44:34,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:44:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:44:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:44:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:44:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:44:34,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:44:34,738 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:44:34,738 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:44:34,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:44:34 BoogieIcfgContainer [2020-10-27 01:44:34,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:44:34,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:44:34,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:44:34,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:44:34,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:44:33" (1/3) ... [2020-10-27 01:44:34,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1656911f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:44:34, skipping insertion in model container [2020-10-27 01:44:34,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:44:34" (2/3) ... [2020-10-27 01:44:34,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1656911f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:44:34, skipping insertion in model container [2020-10-27 01:44:34,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:44:34" (3/3) ... [2020-10-27 01:44:34,754 INFO L111 eAbstractionObserver]: Analyzing ICFG compact.c [2020-10-27 01:44:34,766 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:44:34,771 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:44:34,785 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:44:34,828 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:44:34,828 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:44:34,828 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:44:34,828 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:44:34,828 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:44:34,829 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:44:34,829 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:44:34,829 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:44:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 01:44:34,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-27 01:44:34,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:34,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:34,865 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:34,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:34,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1845562233, now seen corresponding path program 1 times [2020-10-27 01:44:34,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:34,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339377373] [2020-10-27 01:44:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:35,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:35,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:35,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:35,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 01:44:35,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:44:35,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-27 01:44:35,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:35,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:35,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:44:35,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:35,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:44:35,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:35,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:35,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:35,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:35,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:35,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:44:35,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:35,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:35,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:35,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:35,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:35,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339377373] [2020-10-27 01:44:35,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:44:35,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:44:35,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008671607] [2020-10-27 01:44:35,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:44:35,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:44:35,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:44:35,391 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-27 01:44:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:35,478 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2020-10-27 01:44:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:44:35,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-27 01:44:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:35,488 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:44:35,489 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:44:35,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:44:35,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:44:35,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-10-27 01:44:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:44:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 01:44:35,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-10-27 01:44:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:35,549 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 01:44:35,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:44:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 01:44:35,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-27 01:44:35,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:35,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:35,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:44:35,551 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:35,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:35,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1840011497, now seen corresponding path program 1 times [2020-10-27 01:44:35,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:35,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960040073] [2020-10-27 01:44:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:35,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:35,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:35,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:35,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 01:44:35,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:44:35,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-27 01:44:35,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:35,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:44:35,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:35,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:44:35,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:44:35,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:35,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:35,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:35,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:35,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:35,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:44:35,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:35,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:35,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:35,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:35,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:35,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960040073] [2020-10-27 01:44:35,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:44:35,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:44:35,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012175496] [2020-10-27 01:44:35,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:44:35,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:35,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:44:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:44:35,981 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-27 01:44:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:36,084 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-27 01:44:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:44:36,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-27 01:44:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:36,086 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:44:36,086 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:44:36,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:44:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:44:36,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-10-27 01:44:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:44:36,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 01:44:36,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2020-10-27 01:44:36,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:36,095 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 01:44:36,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:44:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 01:44:36,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:44:36,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:36,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:36,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:44:36,096 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash -373684397, now seen corresponding path program 1 times [2020-10-27 01:44:36,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:36,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209911115] [2020-10-27 01:44:36,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:36,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:36,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:36,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:36,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:44:36,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:44:36,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-27 01:44:36,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:44:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:44:36,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:36,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:36,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:36,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:36,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:36,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:36,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:44:36,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:36,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:36,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:36,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:36,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:44:36,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209911115] [2020-10-27 01:44:36,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:36,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:44:36,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253583465] [2020-10-27 01:44:36,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:44:36,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:36,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:44:36,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:44:36,650 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 01:44:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:36,753 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-10-27 01:44:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:44:36,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:44:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:36,754 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:44:36,754 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:44:36,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:44:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:44:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-27 01:44:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:44:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 01:44:36,762 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-10-27 01:44:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:36,762 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 01:44:36,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:44:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 01:44:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:44:36,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:36,763 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:36,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:44:36,764 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:36,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2072037349, now seen corresponding path program 2 times [2020-10-27 01:44:36,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:36,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821567536] [2020-10-27 01:44:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:36,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:36,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:37,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:37,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:44:37,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:44:37,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-27 01:44:37,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:44:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:44:37,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:37,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:37,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:37,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:37,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:37,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:37,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:44:37,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:37,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:37,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:37,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:37,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 01:44:37,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821567536] [2020-10-27 01:44:37,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:37,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:44:37,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009018647] [2020-10-27 01:44:37,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:44:37,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:37,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:44:37,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:44:37,630 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-10-27 01:44:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:37,774 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-27 01:44:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:44:37,774 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 01:44:37,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:37,775 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:44:37,775 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:44:37,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:44:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:44:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-27 01:44:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:44:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-27 01:44:37,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-10-27 01:44:37,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:37,783 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-27 01:44:37,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:44:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-27 01:44:37,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:44:37,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:37,784 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:37,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:44:37,785 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:37,785 INFO L82 PathProgramCache]: Analyzing trace with hash -767325097, now seen corresponding path program 3 times [2020-10-27 01:44:37,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:37,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407101556] [2020-10-27 01:44:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:37,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:37,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:39,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:39,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:44:39,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:44:39,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1811 [2020-10-27 01:44:39,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:39,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:44:39,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:39,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:44:39,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:39,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:39,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:39,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:39,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:39,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:39,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:44:39,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:39,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 01:44:39,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407101556] [2020-10-27 01:44:39,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:39,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:44:39,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072779529] [2020-10-27 01:44:39,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:44:39,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:39,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:44:39,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:44:39,742 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2020-10-27 01:44:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:39,892 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-10-27 01:44:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:44:39,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-27 01:44:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:39,893 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:44:39,894 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:44:39,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:44:39,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:44:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-27 01:44:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:44:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-27 01:44:39,902 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2020-10-27 01:44:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:39,902 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-27 01:44:39,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:44:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-27 01:44:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:44:39,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:39,904 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:39,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:44:39,904 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:39,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1033879839, now seen corresponding path program 4 times [2020-10-27 01:44:39,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:39,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833002517] [2020-10-27 01:44:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:39,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:39,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:43,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:43,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:44:43,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:44:43,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3524 [2020-10-27 01:44:43,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:43,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:44:43,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:43,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:44:43,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:43,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:43,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:43,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:43,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:43,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:43,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:44:43,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:43,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-27 01:44:43,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833002517] [2020-10-27 01:44:43,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:43,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:44:43,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919392862] [2020-10-27 01:44:43,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:44:43,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:43,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:44:43,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:44:43,616 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2020-10-27 01:44:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:43,827 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-27 01:44:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:44:43,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-27 01:44:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:43,829 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:44:43,829 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:44:43,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:44:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:44:43,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-27 01:44:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:44:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-27 01:44:43,846 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-10-27 01:44:43,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:43,847 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-27 01:44:43,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:44:43,847 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-27 01:44:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:44:43,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:43,849 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:43,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:44:43,850 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:43,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:43,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1765026139, now seen corresponding path program 5 times [2020-10-27 01:44:43,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:43,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912428954] [2020-10-27 01:44:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:43,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:48,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:48,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:44:48,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:44:48,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 01:44:48,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:48,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:44:48,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:48,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:44:48,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:49,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:49,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:49,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:49,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:49,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:49,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:44:49,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:49,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:49,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:49,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:49,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-27 01:44:49,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912428954] [2020-10-27 01:44:49,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:49,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:44:49,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249660907] [2020-10-27 01:44:49,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:44:49,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:49,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:44:49,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:44:49,083 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2020-10-27 01:44:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:49,366 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-10-27 01:44:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:44:49,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-27 01:44:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:49,368 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:44:49,368 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:44:49,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:44:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:44:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-27 01:44:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:44:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-27 01:44:49,386 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2020-10-27 01:44:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:49,386 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-27 01:44:49,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:44:49,387 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-27 01:44:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:44:49,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:49,392 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:49,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:44:49,392 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:49,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:49,393 INFO L82 PathProgramCache]: Analyzing trace with hash -2061074979, now seen corresponding path program 6 times [2020-10-27 01:44:49,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:49,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248230095] [2020-10-27 01:44:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:49,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:49,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:54,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:54,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:44:54,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:44:54,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 01:44:54,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:54,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:44:54,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:54,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:44:54,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:54,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:54,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:54,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:54,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:54,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:54,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:44:54,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:54,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:54,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:54,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:54,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-27 01:44:54,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248230095] [2020-10-27 01:44:54,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:54,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:44:54,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114224112] [2020-10-27 01:44:54,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:44:54,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:54,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:44:54,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:44:54,653 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 10 states. [2020-10-27 01:44:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:54,959 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2020-10-27 01:44:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:44:54,959 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-27 01:44:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:54,960 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:44:54,960 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:44:54,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:44:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:44:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-27 01:44:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:44:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-27 01:44:54,975 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2020-10-27 01:44:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:54,975 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-27 01:44:54,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:44:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-27 01:44:54,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:44:54,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:54,976 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:54,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:44:54,977 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:54,979 INFO L82 PathProgramCache]: Analyzing trace with hash 414195295, now seen corresponding path program 7 times [2020-10-27 01:44:54,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:54,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874301371] [2020-10-27 01:44:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:55,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:56,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:00,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:00,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:45:00,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:00,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-27 01:45:00,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:45:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:45:00,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:00,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:00,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:00,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:00,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:00,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:00,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:00,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:00,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:00,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:00,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:00,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-27 01:45:00,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874301371] [2020-10-27 01:45:00,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:00,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:45:00,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543277598] [2020-10-27 01:45:00,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:45:00,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:00,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:45:00,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:00,279 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 11 states. [2020-10-27 01:45:00,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:00,586 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-27 01:45:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:45:00,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-27 01:45:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:00,588 INFO L225 Difference]: With dead ends: 81 [2020-10-27 01:45:00,588 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:45:00,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:45:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:45:00,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-27 01:45:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:45:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-27 01:45:00,603 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2020-10-27 01:45:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:00,603 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-27 01:45:00,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:45:00,603 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-27 01:45:00,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:45:00,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:00,607 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:00,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:45:00,608 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1951447847, now seen corresponding path program 8 times [2020-10-27 01:45:00,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:00,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920510162] [2020-10-27 01:45:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:00,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:00,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:05,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:05,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:45:05,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:05,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5144 [2020-10-27 01:45:05,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:05,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:45:05,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:05,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:45:05,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:05,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:05,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:05,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:05,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:05,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:05,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:05,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:05,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:05,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-27 01:45:06,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920510162] [2020-10-27 01:45:06,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:06,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:45:06,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152027682] [2020-10-27 01:45:06,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:45:06,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:06,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:45:06,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:45:06,010 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 12 states. [2020-10-27 01:45:06,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:06,364 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-10-27 01:45:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:45:06,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-27 01:45:06,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:06,366 INFO L225 Difference]: With dead ends: 89 [2020-10-27 01:45:06,367 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:45:06,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:45:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-27 01:45:06,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:45:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-27 01:45:06,381 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2020-10-27 01:45:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:06,381 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-27 01:45:06,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:45:06,382 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-27 01:45:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:45:06,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:06,383 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:06,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:45:06,383 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:06,384 INFO L82 PathProgramCache]: Analyzing trace with hash 131836771, now seen corresponding path program 9 times [2020-10-27 01:45:06,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:06,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645547917] [2020-10-27 01:45:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:06,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:08,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:11,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:11,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:45:11,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:11,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:45:11,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:11,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:45:11,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:11,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:45:11,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:45:11,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:11,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:11,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:11,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:11,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:11,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:11,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:11,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:11,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:11,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:11,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-27 01:45:11,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645547917] [2020-10-27 01:45:11,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:11,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:45:11,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354683899] [2020-10-27 01:45:11,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:45:11,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:11,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:45:11,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:11,812 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 13 states. [2020-10-27 01:45:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:12,306 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-10-27 01:45:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:45:12,307 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-27 01:45:12,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:12,308 INFO L225 Difference]: With dead ends: 97 [2020-10-27 01:45:12,308 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:45:12,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:45:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:45:12,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-27 01:45:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:45:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-27 01:45:12,317 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2020-10-27 01:45:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:12,318 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-27 01:45:12,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:45:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-27 01:45:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:45:12,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:12,319 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:12,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:45:12,319 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:12,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1630121003, now seen corresponding path program 10 times [2020-10-27 01:45:12,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:12,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145492401] [2020-10-27 01:45:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:12,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:14,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:17,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:17,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:45:17,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:17,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5167 [2020-10-27 01:45:17,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:17,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:45:17,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:45:17,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:17,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:17,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:17,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:17,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:17,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:17,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:17,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:17,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:17,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:17,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:17,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-27 01:45:17,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145492401] [2020-10-27 01:45:17,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:17,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:45:17,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168961424] [2020-10-27 01:45:17,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:45:17,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:17,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:45:17,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:45:17,798 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 14 states. [2020-10-27 01:45:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:18,369 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2020-10-27 01:45:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:45:18,370 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-27 01:45:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:18,371 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:45:18,371 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:45:18,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:45:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:45:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-27 01:45:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:45:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-27 01:45:18,382 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 61 [2020-10-27 01:45:18,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:18,383 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-27 01:45:18,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:45:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-27 01:45:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:45:18,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:18,384 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:18,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:45:18,385 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:18,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:18,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1629810585, now seen corresponding path program 11 times [2020-10-27 01:45:18,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:18,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378827768] [2020-10-27 01:45:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:18,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:20,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:23,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:23,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:45:23,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:23,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5136 [2020-10-27 01:45:23,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:23,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:45:23,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:23,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:45:23,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:23,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:23,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:23,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:23,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:23,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:23,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:23,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:23,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:23,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:23,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-27 01:45:23,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378827768] [2020-10-27 01:45:23,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:23,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:45:23,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322586266] [2020-10-27 01:45:23,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:45:23,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:23,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:45:23,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:45:23,874 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 15 states. [2020-10-27 01:45:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:24,442 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2020-10-27 01:45:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:45:24,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-10-27 01:45:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:24,443 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:45:24,443 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:45:24,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:45:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:45:24,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-27 01:45:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:45:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-27 01:45:24,466 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2020-10-27 01:45:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:24,466 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-27 01:45:24,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:45:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-27 01:45:24,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:45:24,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:24,468 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:24,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:45:24,469 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:24,469 INFO L82 PathProgramCache]: Analyzing trace with hash 74934993, now seen corresponding path program 12 times [2020-10-27 01:45:24,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:24,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337153372] [2020-10-27 01:45:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:24,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:28,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:29,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:29,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:45:29,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:29,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:45:29,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:29,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:45:29,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:29,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:45:29,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:29,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:29,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:29,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:29,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:29,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:29,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:29,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:29,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:29,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:29,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:29,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-27 01:45:29,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337153372] [2020-10-27 01:45:29,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:29,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:45:29,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286696787] [2020-10-27 01:45:29,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:45:29,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:29,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:45:29,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:45:29,896 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 16 states. [2020-10-27 01:45:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:30,679 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2020-10-27 01:45:30,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:45:30,680 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-27 01:45:30,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:30,681 INFO L225 Difference]: With dead ends: 121 [2020-10-27 01:45:30,681 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 01:45:30,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:45:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 01:45:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-27 01:45:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:45:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 01:45:30,696 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2020-10-27 01:45:30,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:30,697 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 01:45:30,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:45:30,697 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 01:45:30,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 01:45:30,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:30,709 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:30,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:45:30,709 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:30,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:30,711 INFO L82 PathProgramCache]: Analyzing trace with hash 181570923, now seen corresponding path program 13 times [2020-10-27 01:45:30,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:30,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142904707] [2020-10-27 01:45:30,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:30,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:30,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:36,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:36,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 01:45:36,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:36,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5393 [2020-10-27 01:45:36,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:36,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:45:36,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:36,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:45:36,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:36,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:36,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:36,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:36,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:36,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:36,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:36,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:36,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:36,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-27 01:45:36,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142904707] [2020-10-27 01:45:36,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:36,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:45:36,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30850999] [2020-10-27 01:45:36,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:45:36,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:36,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:45:36,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:45:36,490 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 17 states. [2020-10-27 01:45:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:37,221 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2020-10-27 01:45:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:45:37,221 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-27 01:45:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:37,222 INFO L225 Difference]: With dead ends: 129 [2020-10-27 01:45:37,222 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:45:37,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:45:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:45:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-27 01:45:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:45:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-27 01:45:37,231 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2020-10-27 01:45:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:37,231 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-27 01:45:37,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:45:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-27 01:45:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 01:45:37,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:37,232 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:37,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:45:37,233 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash -76658227, now seen corresponding path program 14 times [2020-10-27 01:45:37,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:37,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341960955] [2020-10-27 01:45:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:37,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:42,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:42,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 01:45:42,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:42,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 01:45:42,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:45:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:45:42,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:42,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:42,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:42,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:42,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:42,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:42,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:42,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:42,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-27 01:45:42,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341960955] [2020-10-27 01:45:42,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:42,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:45:42,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359420966] [2020-10-27 01:45:42,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:45:42,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:45:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:45:42,664 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 18 states. [2020-10-27 01:45:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:43,464 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2020-10-27 01:45:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:45:43,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-27 01:45:43,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:43,466 INFO L225 Difference]: With dead ends: 137 [2020-10-27 01:45:43,466 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:45:43,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:45:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:45:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-27 01:45:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:45:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-27 01:45:43,476 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2020-10-27 01:45:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:43,477 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-27 01:45:43,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:45:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-27 01:45:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 01:45:43,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:43,478 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:43,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:45:43,478 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:43,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1041866129, now seen corresponding path program 15 times [2020-10-27 01:45:43,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:43,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913151118] [2020-10-27 01:45:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:43,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:48,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:48,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:45:48,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:48,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5198 [2020-10-27 01:45:48,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:45:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:45:48,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:49,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:49,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:49,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:49,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:49,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:49,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:49,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:49,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:49,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:49,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:49,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-27 01:45:49,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913151118] [2020-10-27 01:45:49,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:49,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:45:49,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619237701] [2020-10-27 01:45:49,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:45:49,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:49,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:45:49,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:45:49,136 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 19 states. [2020-10-27 01:45:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:50,040 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2020-10-27 01:45:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:45:50,041 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-10-27 01:45:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:50,042 INFO L225 Difference]: With dead ends: 145 [2020-10-27 01:45:50,042 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:45:50,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:45:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:45:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-27 01:45:50,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:45:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-27 01:45:50,051 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 86 [2020-10-27 01:45:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:50,051 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-27 01:45:50,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:45:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-27 01:45:50,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 01:45:50,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:50,052 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:50,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:45:50,052 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:50,053 INFO L82 PathProgramCache]: Analyzing trace with hash 932622537, now seen corresponding path program 16 times [2020-10-27 01:45:50,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:50,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66345065] [2020-10-27 01:45:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:50,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:55,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:55,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 01:45:55,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:55,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5246 [2020-10-27 01:45:55,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:55,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:45:55,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:55,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:45:55,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:55,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:55,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:55,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:55,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:55,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:55,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:55,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:55,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:55,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:55,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:55,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-27 01:45:55,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66345065] [2020-10-27 01:45:55,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:55,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:45:55,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620527737] [2020-10-27 01:45:55,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:45:55,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:55,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:45:55,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:45:55,774 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 20 states. [2020-10-27 01:45:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:56,758 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2020-10-27 01:45:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:45:56,760 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-10-27 01:45:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:56,762 INFO L225 Difference]: With dead ends: 153 [2020-10-27 01:45:56,762 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:45:56,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:45:56,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:45:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-10-27 01:45:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:45:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-27 01:45:56,773 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 91 [2020-10-27 01:45:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:56,773 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-27 01:45:56,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:45:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-27 01:45:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:45:56,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:56,774 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:56,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:45:56,775 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:56,775 INFO L82 PathProgramCache]: Analyzing trace with hash 121294707, now seen corresponding path program 17 times [2020-10-27 01:45:56,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:56,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853650363] [2020-10-27 01:45:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:56,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:02,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:02,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 01:46:02,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:02,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5489 [2020-10-27 01:46:02,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:02,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:46:02,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:02,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:46:02,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:02,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:02,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:02,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:02,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:02,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:02,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:02,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:02,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:02,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:02,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:02,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-27 01:46:02,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853650363] [2020-10-27 01:46:02,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:02,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:46:02,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445024382] [2020-10-27 01:46:02,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:46:02,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:02,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:46:02,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:46:02,780 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 21 states. [2020-10-27 01:46:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:03,882 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2020-10-27 01:46:03,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:46:03,882 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-10-27 01:46:03,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:03,884 INFO L225 Difference]: With dead ends: 161 [2020-10-27 01:46:03,884 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 01:46:03,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:46:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 01:46:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-10-27 01:46:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:46:03,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-27 01:46:03,893 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 96 [2020-10-27 01:46:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:03,893 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-27 01:46:03,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:46:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-27 01:46:03,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 01:46:03,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:03,894 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:03,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:46:03,894 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:03,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:03,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1573674949, now seen corresponding path program 18 times [2020-10-27 01:46:03,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:03,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015529460] [2020-10-27 01:46:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:03,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:09,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:09,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 01:46:09,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:09,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5380 [2020-10-27 01:46:09,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:09,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:46:09,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:09,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:46:09,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:09,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:09,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:09,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:09,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:09,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:09,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:09,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:09,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:09,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:09,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:09,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-27 01:46:09,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015529460] [2020-10-27 01:46:09,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:09,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:46:09,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227152150] [2020-10-27 01:46:09,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:46:09,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:09,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:46:09,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:46:09,827 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 22 states. [2020-10-27 01:46:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:11,080 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2020-10-27 01:46:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:46:11,081 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2020-10-27 01:46:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:11,082 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:46:11,082 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:46:11,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:46:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:46:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-27 01:46:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:46:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-27 01:46:11,091 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 101 [2020-10-27 01:46:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:11,091 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-27 01:46:11,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:46:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-27 01:46:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 01:46:11,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:11,093 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:11,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:46:11,093 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:11,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1861489783, now seen corresponding path program 19 times [2020-10-27 01:46:11,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:11,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762755540] [2020-10-27 01:46:11,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:11,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:16,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:16,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 01:46:16,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:16,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5659 [2020-10-27 01:46:16,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:46:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:46:16,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:17,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:17,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:17,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:17,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:17,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:17,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 01:46:17,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:17,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:17,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:17,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:17,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-27 01:46:17,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762755540] [2020-10-27 01:46:17,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:17,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:46:17,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208032032] [2020-10-27 01:46:17,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:46:17,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:46:17,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:46:17,359 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 23 states. [2020-10-27 01:46:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:18,736 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2020-10-27 01:46:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:46:18,736 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-10-27 01:46:18,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:18,738 INFO L225 Difference]: With dead ends: 177 [2020-10-27 01:46:18,738 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:46:18,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:46:18,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:46:18,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-10-27 01:46:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 01:46:18,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-27 01:46:18,747 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 106 [2020-10-27 01:46:18,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:18,747 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-27 01:46:18,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:46:18,747 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-27 01:46:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 01:46:18,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:18,749 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:18,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:46:18,749 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:18,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2146113217, now seen corresponding path program 20 times [2020-10-27 01:46:18,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:18,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365861264] [2020-10-27 01:46:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:18,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:24,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:24,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 01:46:24,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:24,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5710 [2020-10-27 01:46:24,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:24,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:46:24,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:24,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:46:24,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:25,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:25,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:25,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:25,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:25,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:25,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:25,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:25,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:25,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:25,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-27 01:46:25,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365861264] [2020-10-27 01:46:25,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:25,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:46:25,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431912880] [2020-10-27 01:46:25,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:46:25,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:25,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:46:25,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:46:25,083 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 24 states. [2020-10-27 01:46:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:26,589 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2020-10-27 01:46:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:46:26,596 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2020-10-27 01:46:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:26,597 INFO L225 Difference]: With dead ends: 185 [2020-10-27 01:46:26,598 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 01:46:26,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:46:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 01:46:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-27 01:46:26,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:46:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-27 01:46:26,612 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 111 [2020-10-27 01:46:26,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:26,612 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-27 01:46:26,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:46:26,612 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-27 01:46:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 01:46:26,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:26,616 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:26,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:46:26,616 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1647735163, now seen corresponding path program 21 times [2020-10-27 01:46:26,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:26,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631313869] [2020-10-27 01:46:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:26,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:32,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:32,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 01:46:32,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6327 [2020-10-27 01:46:32,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:46:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:46:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:33,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:33,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:33,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:33,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:33,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:33,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:33,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:33,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:33,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:33,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:33,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-27 01:46:33,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631313869] [2020-10-27 01:46:33,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:33,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:46:33,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983643951] [2020-10-27 01:46:33,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:46:33,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:33,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:46:33,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:46:33,690 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 25 states. [2020-10-27 01:46:35,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:35,350 INFO L93 Difference]: Finished difference Result 193 states and 196 transitions. [2020-10-27 01:46:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:46:35,356 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-10-27 01:46:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:35,357 INFO L225 Difference]: With dead ends: 193 [2020-10-27 01:46:35,357 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 01:46:35,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:46:35,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 01:46:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-10-27 01:46:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:46:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-10-27 01:46:35,366 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 116 [2020-10-27 01:46:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:35,367 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-10-27 01:46:35,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:46:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-10-27 01:46:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 01:46:35,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:35,369 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:35,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:46:35,369 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:35,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:35,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1731291715, now seen corresponding path program 22 times [2020-10-27 01:46:35,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:35,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102044545] [2020-10-27 01:46:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:35,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:40,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:40,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 01:46:40,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:40,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 01:46:40,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:46:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:46:40,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:41,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:41,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:41,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:41,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:41,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:41,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:46:41,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:41,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:41,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:41,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:41,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-27 01:46:41,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102044545] [2020-10-27 01:46:41,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:41,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:46:41,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134416066] [2020-10-27 01:46:41,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:46:41,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:41,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:46:41,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:46:41,137 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 26 states. [2020-10-27 01:46:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:42,855 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2020-10-27 01:46:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:46:42,856 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2020-10-27 01:46:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:42,857 INFO L225 Difference]: With dead ends: 201 [2020-10-27 01:46:42,858 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:46:42,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:46:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:46:42,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-27 01:46:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:46:42,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-27 01:46:42,866 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 121 [2020-10-27 01:46:42,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:42,867 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-27 01:46:42,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:46:42,867 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-27 01:46:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 01:46:42,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:42,868 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:42,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:46:42,868 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:42,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1557780865, now seen corresponding path program 23 times [2020-10-27 01:46:42,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:42,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609977054] [2020-10-27 01:46:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:42,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:49,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:49,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 01:46:49,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:49,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6778 [2020-10-27 01:46:49,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:49,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:46:49,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:49,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:46:49,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:50,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:50,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:50,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:50,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:50,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:50,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:50,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:50,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:50,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:50,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:50,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-27 01:46:50,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609977054] [2020-10-27 01:46:50,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:50,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:46:50,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208349706] [2020-10-27 01:46:50,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:46:50,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:50,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:46:50,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:46:50,406 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 27 states. [2020-10-27 01:46:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:52,335 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2020-10-27 01:46:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:46:52,336 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 126 [2020-10-27 01:46:52,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:52,337 INFO L225 Difference]: With dead ends: 209 [2020-10-27 01:46:52,337 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 01:46:52,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:46:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 01:46:52,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-10-27 01:46:52,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 01:46:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-10-27 01:46:52,346 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 126 [2020-10-27 01:46:52,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:52,347 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-10-27 01:46:52,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:46:52,347 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-10-27 01:46:52,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 01:46:52,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:52,348 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:52,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:46:52,349 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:52,349 INFO L82 PathProgramCache]: Analyzing trace with hash 139631801, now seen corresponding path program 24 times [2020-10-27 01:46:52,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:52,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268569595] [2020-10-27 01:46:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:52,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:58,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:58,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 01:46:58,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:58,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6249 [2020-10-27 01:46:58,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:58,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:46:58,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:58,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:46:58,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:59,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:59,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:59,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:59,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:59,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:59,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:59,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:59,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:59,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:59,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:59,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-27 01:46:59,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268569595] [2020-10-27 01:46:59,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:59,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:46:59,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275239668] [2020-10-27 01:46:59,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:46:59,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:59,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:46:59,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:46:59,410 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 28 states. [2020-10-27 01:47:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:01,509 INFO L93 Difference]: Finished difference Result 217 states and 220 transitions. [2020-10-27 01:47:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:47:01,509 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 131 [2020-10-27 01:47:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:01,511 INFO L225 Difference]: With dead ends: 217 [2020-10-27 01:47:01,511 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 01:47:01,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:47:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 01:47:01,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-10-27 01:47:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 01:47:01,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-27 01:47:01,520 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 131 [2020-10-27 01:47:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:01,520 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-27 01:47:01,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:47:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-27 01:47:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 01:47:01,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:01,522 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:01,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:47:01,522 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:01,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:01,523 INFO L82 PathProgramCache]: Analyzing trace with hash -790137981, now seen corresponding path program 25 times [2020-10-27 01:47:01,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:01,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128120880] [2020-10-27 01:47:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:01,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:01,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:07,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:07,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 01:47:07,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:07,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5807 [2020-10-27 01:47:07,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:07,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:47:07,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:07,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:47:07,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:08,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:08,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:08,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:08,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:08,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:08,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:47:08,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:08,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:08,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:08,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:08,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-27 01:47:08,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128120880] [2020-10-27 01:47:08,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:08,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:47:08,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29669999] [2020-10-27 01:47:08,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:47:08,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:08,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:47:08,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:47:08,187 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 29 states. [2020-10-27 01:47:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:10,417 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2020-10-27 01:47:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:47:10,418 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 136 [2020-10-27 01:47:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:10,419 INFO L225 Difference]: With dead ends: 225 [2020-10-27 01:47:10,419 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 01:47:10,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:47:10,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 01:47:10,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-27 01:47:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 01:47:10,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2020-10-27 01:47:10,434 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 136 [2020-10-27 01:47:10,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:10,435 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2020-10-27 01:47:10,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:47:10,435 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2020-10-27 01:47:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 01:47:10,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:10,442 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:10,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:47:10,442 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:10,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:10,442 INFO L82 PathProgramCache]: Analyzing trace with hash 257092533, now seen corresponding path program 26 times [2020-10-27 01:47:10,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:10,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616518973] [2020-10-27 01:47:10,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:10,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:10,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:19,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:19,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 01:47:19,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:19,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8846 [2020-10-27 01:47:19,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:47:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:47:19,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:20,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:20,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:20,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:20,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:20,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:20,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:20,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:20,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:20,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:20,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:20,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-27 01:47:20,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616518973] [2020-10-27 01:47:20,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:20,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:47:20,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522631626] [2020-10-27 01:47:20,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:47:20,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:20,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:47:20,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:47:20,200 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 30 states. [2020-10-27 01:47:22,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:22,612 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2020-10-27 01:47:22,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:47:22,613 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2020-10-27 01:47:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:22,615 INFO L225 Difference]: With dead ends: 233 [2020-10-27 01:47:22,615 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 01:47:22,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:47:22,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 01:47:22,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-27 01:47:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 01:47:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2020-10-27 01:47:22,623 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 141 [2020-10-27 01:47:22,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:22,623 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2020-10-27 01:47:22,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:47:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2020-10-27 01:47:22,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-27 01:47:22,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:22,625 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:22,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:47:22,625 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:22,625 INFO L82 PathProgramCache]: Analyzing trace with hash -341927801, now seen corresponding path program 27 times [2020-10-27 01:47:22,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:22,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408378267] [2020-10-27 01:47:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:22,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:31,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:31,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 01:47:31,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:31,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9137 [2020-10-27 01:47:31,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:31,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:47:31,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:31,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:47:31,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:32,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:32,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:32,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:32,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:32,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:32,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:32,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:32,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:32,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:32,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:32,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-27 01:47:32,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408378267] [2020-10-27 01:47:32,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:32,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:47:32,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037645896] [2020-10-27 01:47:32,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:47:32,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:32,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:47:32,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:47:32,756 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 31 states. [2020-10-27 01:47:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:35,344 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2020-10-27 01:47:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:47:35,344 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2020-10-27 01:47:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:35,346 INFO L225 Difference]: With dead ends: 241 [2020-10-27 01:47:35,346 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 01:47:35,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:47:35,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 01:47:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-27 01:47:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 01:47:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2020-10-27 01:47:35,355 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 146 [2020-10-27 01:47:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:35,356 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2020-10-27 01:47:35,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:47:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2020-10-27 01:47:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 01:47:35,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:35,357 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:35,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:47:35,357 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:35,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:35,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1269514929, now seen corresponding path program 28 times [2020-10-27 01:47:35,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:35,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574058550] [2020-10-27 01:47:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:35,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:45,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:45,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 01:47:45,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:45,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10307 [2020-10-27 01:47:45,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:45,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:47:45,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:45,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:47:45,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:46,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:46,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:46,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:46,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:46,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:46,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:46,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:46,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:46,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:46,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:46,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-27 01:47:46,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574058550] [2020-10-27 01:47:46,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:46,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:47:46,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880112313] [2020-10-27 01:47:46,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:47:46,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:46,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:47:46,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:47:46,684 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 32 states. [2020-10-27 01:47:49,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:49,436 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2020-10-27 01:47:49,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:47:49,437 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2020-10-27 01:47:49,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:49,439 INFO L225 Difference]: With dead ends: 249 [2020-10-27 01:47:49,439 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 01:47:49,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:47:49,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 01:47:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-10-27 01:47:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 01:47:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-27 01:47:49,448 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 151 [2020-10-27 01:47:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:49,449 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-27 01:47:49,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:47:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-27 01:47:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 01:47:49,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:49,450 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:49,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:47:49,450 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:49,451 INFO L82 PathProgramCache]: Analyzing trace with hash -663759477, now seen corresponding path program 29 times [2020-10-27 01:47:49,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:49,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131583092] [2020-10-27 01:47:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:49,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:57,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:57,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 01:47:57,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:57,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8222 [2020-10-27 01:47:57,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:57,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:47:57,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:57,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:47:57,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:58,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:58,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:58,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:58,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:58,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:58,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:58,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:58,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:58,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:58,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:58,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-27 01:47:58,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131583092] [2020-10-27 01:47:58,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:58,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:47:58,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850597568] [2020-10-27 01:47:58,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:47:58,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:58,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:47:58,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:47:58,741 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 33 states. [2020-10-27 01:48:01,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:01,668 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2020-10-27 01:48:01,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:48:01,670 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 156 [2020-10-27 01:48:01,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:01,671 INFO L225 Difference]: With dead ends: 257 [2020-10-27 01:48:01,671 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 01:48:01,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:48:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 01:48:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-10-27 01:48:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 01:48:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-10-27 01:48:01,680 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 156 [2020-10-27 01:48:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:01,680 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-10-27 01:48:01,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:48:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-10-27 01:48:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 01:48:01,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:01,682 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:01,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:48:01,683 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:01,684 INFO L82 PathProgramCache]: Analyzing trace with hash 876044717, now seen corresponding path program 30 times [2020-10-27 01:48:01,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:01,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661947782] [2020-10-27 01:48:01,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:01,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:12,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 01:48:12,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:12,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10289 [2020-10-27 01:48:12,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:48:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:48:12,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:13,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:13,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:13,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:13,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:13,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:13,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:13,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:13,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:13,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:13,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:13,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:48:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-27 01:48:13,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661947782] [2020-10-27 01:48:13,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:13,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:48:13,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024250961] [2020-10-27 01:48:13,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:48:13,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:13,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:48:13,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:48:13,138 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 34 states. [2020-10-27 01:48:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:16,209 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2020-10-27 01:48:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:48:16,210 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 161 [2020-10-27 01:48:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:16,211 INFO L225 Difference]: With dead ends: 265 [2020-10-27 01:48:16,212 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 01:48:16,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:48:16,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 01:48:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-10-27 01:48:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:48:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2020-10-27 01:48:16,221 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 161 [2020-10-27 01:48:16,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:16,222 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2020-10-27 01:48:16,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:48:16,222 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2020-10-27 01:48:16,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-27 01:48:16,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:16,223 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:16,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:48:16,223 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:16,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:16,224 INFO L82 PathProgramCache]: Analyzing trace with hash -444634481, now seen corresponding path program 31 times [2020-10-27 01:48:16,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:16,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754214357] [2020-10-27 01:48:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:16,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:25,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:25,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-27 01:48:25,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:25,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8970 [2020-10-27 01:48:25,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:25,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:48:25,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:25,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:48:25,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0