/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:53:43,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:53:43,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:53:43,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:53:43,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:53:43,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:53:43,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:53:43,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:53:43,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:53:43,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:53:43,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:53:43,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:53:43,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:53:43,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:53:43,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:53:43,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:53:43,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:53:43,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:53:43,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:53:43,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:53:43,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:53:43,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:53:43,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:53:43,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:53:43,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:53:43,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:53:43,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:53:43,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:53:43,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:53:43,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:53:43,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:53:43,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:53:43,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:53:43,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:53:43,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:53:43,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:53:43,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:53:43,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:53:43,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:53:43,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:53:43,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:53:43,135 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 [2020-10-28 14:53:43,170 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:53:43,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:53:43,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:53:43,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:53:43,173 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:53:43,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:53:43,174 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:53:43,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:53:43,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:53:43,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:53:43,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:53:43,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:53:43,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:53:43,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:53:43,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:53:43,177 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:53:43,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:53:43,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:53:43,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:53:43,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:53:43,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:53:43,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:53:43,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:53:43,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:53:43,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:53:43,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:53:43,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:53:43,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:53:43,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:53:43,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:53:43,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:53:43,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:53:43,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:53:43,658 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:53:43,659 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:53:43,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i [2020-10-28 14:53:43,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18898d7f4/61cb721e6b694eb786709953a05ac980/FLAGfabf64e8b [2020-10-28 14:53:44,396 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:53:44,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_2-1.i [2020-10-28 14:53:44,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18898d7f4/61cb721e6b694eb786709953a05ac980/FLAGfabf64e8b [2020-10-28 14:53:44,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18898d7f4/61cb721e6b694eb786709953a05ac980 [2020-10-28 14:53:44,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:53:44,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:53:44,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:44,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:53:44,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:53:44,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:44" (1/1) ... [2020-10-28 14:53:44,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b5f536b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:44, skipping insertion in model container [2020-10-28 14:53:44,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:44" (1/1) ... [2020-10-28 14:53:44,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:53:44,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:53:44,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:44,996 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:53:45,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:45,039 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:53:45,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:45 WrapperNode [2020-10-28 14:53:45,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:45,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:53:45,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:53:45,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:53:45,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:45" (1/1) ... [2020-10-28 14:53:45,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:45" (1/1) ... [2020-10-28 14:53:45,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:45" (1/1) ... [2020-10-28 14:53:45,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:45" (1/1) ... [2020-10-28 14:53:45,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:45" (1/1) ... [2020-10-28 14:53:45,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:45" (1/1) ... [2020-10-28 14:53:45,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:45" (1/1) ... [2020-10-28 14:53:45,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:53:45,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:53:45,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:53:45,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:53:45,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:45" (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 [2020-10-28 14:53:45,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:53:45,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:53:45,179 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:53:45,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:53:45,180 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:53:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:53:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:53:45,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:53:45,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:53:45,181 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:53:45,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:53:45,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:53:45,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:53:45,183 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:53:45,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:53:45,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:53:45,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:53:45,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:53:45,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:53:45,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:53:45,669 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:53:45,669 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:53:45,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:45 BoogieIcfgContainer [2020-10-28 14:53:45,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:53:45,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:53:45,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:53:45,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:53:45,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:53:44" (1/3) ... [2020-10-28 14:53:45,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b0a28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:45, skipping insertion in model container [2020-10-28 14:53:45,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:45" (2/3) ... [2020-10-28 14:53:45,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b0a28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:45, skipping insertion in model container [2020-10-28 14:53:45,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:45" (3/3) ... [2020-10-28 14:53:45,682 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1.i [2020-10-28 14:53:45,698 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:53:45,704 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:53:45,721 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:53:45,751 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:53:45,751 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:53:45,751 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:53:45,751 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:53:45,752 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:53:45,752 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:53:45,752 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:53:45,752 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:53:45,771 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 14:53:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:53:45,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:45,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:45,779 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:45,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:45,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1359145685, now seen corresponding path program 1 times [2020-10-28 14:53:45,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:45,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491685095] [2020-10-28 14:53:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:45,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:46,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:46,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:46,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:53:46,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:46,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-28 14:53:46,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:46,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:46,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:46,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:53:46,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:46,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:53:46,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:46,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:46,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:46,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:46,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:46,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 14:53:46,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:46,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:46,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:46,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:46,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:46,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:46,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491685095] [2020-10-28 14:53:46,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:46,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:53:46,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595317780] [2020-10-28 14:53:46,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:53:46,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:46,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:53:46,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:53:46,406 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-28 14:53:46,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:46,561 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-10-28 14:53:46,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:53:46,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-28 14:53:46,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:46,572 INFO L225 Difference]: With dead ends: 47 [2020-10-28 14:53:46,572 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 14:53:46,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:53:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 14:53:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 14:53:46,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:53:46,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-28 14:53:46,619 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-28 14:53:46,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:46,619 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-28 14:53:46,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:53:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-28 14:53:46,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:53:46,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:46,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:46,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:53:46,622 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:46,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash 671299297, now seen corresponding path program 1 times [2020-10-28 14:53:46,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:46,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102606868] [2020-10-28 14:53:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:46,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:46,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:46,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:46,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:53:46,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:46,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-28 14:53:46,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:46,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:46,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:46,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:46,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:53:46,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:46,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:46,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:46,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:46,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:46,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:46,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:46,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:46,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:46,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:46,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:46,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:46,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:46,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102606868] [2020-10-28 14:53:46,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:46,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:46,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520180887] [2020-10-28 14:53:46,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:46,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:46,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:46,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:46,940 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2020-10-28 14:53:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:47,012 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-28 14:53:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:47,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 14:53:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:47,014 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:53:47,014 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 14:53:47,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 14:53:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-10-28 14:53:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:53:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-28 14:53:47,023 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-28 14:53:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:47,024 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-28 14:53:47,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-28 14:53:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:53:47,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:47,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:47,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:53:47,026 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:47,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1983033189, now seen corresponding path program 1 times [2020-10-28 14:53:47,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:47,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832089562] [2020-10-28 14:53:47,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:47,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:47,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:47,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:47,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:53:47,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:47,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-28 14:53:47,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:47,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:47,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:53:47,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:47,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:53:47,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:47,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:47,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:47,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:47,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:47,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:47,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:47,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:47,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:47,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:47,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:47,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:47,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:53:47,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832089562] [2020-10-28 14:53:47,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:47,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:53:47,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106007000] [2020-10-28 14:53:47,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:53:47,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:47,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:53:47,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:47,446 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-28 14:53:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:47,543 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-28 14:53:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:53:47,544 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 14:53:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:47,545 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:53:47,545 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:53:47,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:47,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:53:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-28 14:53:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 14:53:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-28 14:53:47,554 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2020-10-28 14:53:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:47,554 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-28 14:53:47,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:53:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-28 14:53:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:53:47,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:47,556 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:47,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:53:47,556 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:47,557 INFO L82 PathProgramCache]: Analyzing trace with hash -432056855, now seen corresponding path program 2 times [2020-10-28 14:53:47,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:47,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354560295] [2020-10-28 14:53:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:47,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:47,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:48,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:48,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:53:48,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:48,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-28 14:53:48,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:48,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:48,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:53:48,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:48,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:53:48,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:48,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:48,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:48,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:48,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:48,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:48,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:48,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:48,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:48,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:48,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:48,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:48,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 14:53:48,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354560295] [2020-10-28 14:53:48,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:48,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:53:48,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968977266] [2020-10-28 14:53:48,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:53:48,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:48,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:53:48,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:53:48,135 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-10-28 14:53:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:48,228 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-10-28 14:53:48,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:53:48,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-28 14:53:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:48,230 INFO L225 Difference]: With dead ends: 45 [2020-10-28 14:53:48,230 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 14:53:48,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:53:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 14:53:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-28 14:53:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:53:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-28 14:53:48,238 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2020-10-28 14:53:48,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:48,238 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-28 14:53:48,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:53:48,238 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-28 14:53:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:53:48,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:48,239 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:48,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:53:48,240 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:48,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1490954861, now seen corresponding path program 3 times [2020-10-28 14:53:48,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:48,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208130696] [2020-10-28 14:53:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:48,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:48,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:49,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:49,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:53:49,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:49,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 900 [2020-10-28 14:53:49,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:49,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:49,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:53:49,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:53:49,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:49,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:49,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:49,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:49,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:49,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:49,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:49,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:49,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:49,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:49,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 14:53:49,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208130696] [2020-10-28 14:53:49,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:49,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:53:49,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103487962] [2020-10-28 14:53:49,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:53:49,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:49,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:53:49,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:53:49,288 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2020-10-28 14:53:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:49,431 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-10-28 14:53:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:53:49,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-28 14:53:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:49,433 INFO L225 Difference]: With dead ends: 51 [2020-10-28 14:53:49,433 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 14:53:49,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:53:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 14:53:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-28 14:53:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:53:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-28 14:53:49,441 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2020-10-28 14:53:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:49,442 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-28 14:53:49,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:53:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-28 14:53:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:53:49,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:49,443 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:49,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:53:49,444 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:49,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:49,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2101619953, now seen corresponding path program 4 times [2020-10-28 14:53:49,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:49,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565734920] [2020-10-28 14:53:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:49,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:49,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:50,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:50,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:53:50,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:50,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-28 14:53:50,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:50,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:50,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:53:50,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:50,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:53:50,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:50,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:50,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:50,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:50,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:50,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:50,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:50,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:50,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:50,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:50,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:50,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:50,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 14:53:50,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565734920] [2020-10-28 14:53:50,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:50,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:53:50,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962612900] [2020-10-28 14:53:50,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:53:50,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:50,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:53:50,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:53:50,826 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2020-10-28 14:53:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:50,943 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-28 14:53:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:53:50,944 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-28 14:53:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:50,945 INFO L225 Difference]: With dead ends: 57 [2020-10-28 14:53:50,945 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:53:50,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:53:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:53:50,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-28 14:53:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:53:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-28 14:53:50,953 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2020-10-28 14:53:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:50,953 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-28 14:53:50,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:53:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-28 14:53:50,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:53:50,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:50,955 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:50,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:53:50,955 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:50,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:50,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1361468789, now seen corresponding path program 5 times [2020-10-28 14:53:50,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:50,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760500040] [2020-10-28 14:53:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:50,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:51,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:53,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:53,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:53:53,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:53,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2244 [2020-10-28 14:53:53,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:53,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:53,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:53:53,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 14:53:53,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:53:53,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:53,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:53,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:53,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:53,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:53,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:53,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:53,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:53,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:53,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:53,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:53,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 14:53:53,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760500040] [2020-10-28 14:53:53,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:53,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:53:53,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130012122] [2020-10-28 14:53:53,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:53:53,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:53,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:53:53,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:53:53,343 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2020-10-28 14:53:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:53,510 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-28 14:53:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:53:53,511 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-28 14:53:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:53,512 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:53:53,512 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:53:53,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:53:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:53:53,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-28 14:53:53,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:53:53,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-28 14:53:53,520 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2020-10-28 14:53:53,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:53,521 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-28 14:53:53,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:53:53,521 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-28 14:53:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:53:53,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:53,522 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:53,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:53:53,523 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:53,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:53,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1598440455, now seen corresponding path program 6 times [2020-10-28 14:53:53,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:53,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847755683] [2020-10-28 14:53:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:53,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:53,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:57,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:57,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:53:57,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:57,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3815 [2020-10-28 14:53:57,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:57,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:57,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:53:57,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 14:53:57,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:53:57,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:57,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:57,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:57,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:57,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:57,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:57,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:57,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:57,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:57,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:57,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 14:53:57,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847755683] [2020-10-28 14:53:57,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:57,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:53:57,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808722185] [2020-10-28 14:53:57,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:53:57,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:57,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:53:57,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:53:57,504 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 10 states. [2020-10-28 14:53:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:57,667 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-10-28 14:53:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:53:57,669 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-28 14:53:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:57,673 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:53:57,673 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:53:57,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:53:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:53:57,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-28 14:53:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:53:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-28 14:53:57,683 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2020-10-28 14:53:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:57,683 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-28 14:53:57,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:53:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-28 14:53:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:53:57,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:57,686 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:57,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:53:57,687 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:57,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:57,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2035070851, now seen corresponding path program 7 times [2020-10-28 14:53:57,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:57,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116778342] [2020-10-28 14:53:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:57,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:57,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:02,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:02,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:54:02,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:02,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 14:54:02,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:02,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:54:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 14:54:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:54:02,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:02,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:02,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:02,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:02,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:02,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:02,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:54:02,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:02,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:02,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:02,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:02,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:02,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 14:54:02,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116778342] [2020-10-28 14:54:02,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:02,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:54:02,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820807428] [2020-10-28 14:54:02,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:54:02,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:02,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:54:02,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:54:02,906 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 11 states. [2020-10-28 14:54:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:03,079 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2020-10-28 14:54:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:54:03,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-28 14:54:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:03,080 INFO L225 Difference]: With dead ends: 75 [2020-10-28 14:54:03,081 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:54:03,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:54:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:54:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-28 14:54:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:54:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-28 14:54:03,095 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2020-10-28 14:54:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:03,098 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-28 14:54:03,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:54:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-28 14:54:03,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:54:03,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:03,099 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:03,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:54:03,099 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:03,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:03,102 INFO L82 PathProgramCache]: Analyzing trace with hash -330824959, now seen corresponding path program 8 times [2020-10-28 14:54:03,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:03,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481317824] [2020-10-28 14:54:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:03,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:03,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:08,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:08,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:54:08,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:08,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 14:54:08,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:08,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:08,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:54:08,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 14:54:08,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:54:08,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:08,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:08,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:08,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:08,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:08,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:08,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:08,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:08,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:08,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:08,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:08,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:08,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 14:54:08,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481317824] [2020-10-28 14:54:08,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:08,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:54:08,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070282191] [2020-10-28 14:54:08,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:54:08,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:08,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:54:08,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:54:08,348 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 12 states. [2020-10-28 14:54:08,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:08,524 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-28 14:54:08,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:54:08,525 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-28 14:54:08,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:08,525 INFO L225 Difference]: With dead ends: 81 [2020-10-28 14:54:08,526 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:54:08,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:54:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:54:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-28 14:54:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:54:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-28 14:54:08,539 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2020-10-28 14:54:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:08,539 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-28 14:54:08,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:54:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-28 14:54:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:54:08,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:08,543 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:08,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:54:08,543 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:08,544 INFO L82 PathProgramCache]: Analyzing trace with hash 153938821, now seen corresponding path program 9 times [2020-10-28 14:54:08,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:08,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510298942] [2020-10-28 14:54:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:08,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:08,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:13,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:13,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:54:13,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:13,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 14:54:13,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:13,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:13,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:54:13,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:13,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:54:13,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:13,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:13,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:13,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:13,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:13,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:13,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:13,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:13,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:13,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:13,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:13,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:13,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 14:54:13,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510298942] [2020-10-28 14:54:13,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:13,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:54:13,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431207606] [2020-10-28 14:54:13,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:54:13,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:13,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:54:13,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:54:13,774 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 13 states. [2020-10-28 14:54:13,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:13,989 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-10-28 14:54:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:54:13,992 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-28 14:54:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:13,993 INFO L225 Difference]: With dead ends: 87 [2020-10-28 14:54:13,993 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:54:13,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:54:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:54:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-28 14:54:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:54:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-28 14:54:14,014 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2020-10-28 14:54:14,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:14,015 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-28 14:54:14,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:54:14,015 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-28 14:54:14,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 14:54:14,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:14,016 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:14,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:54:14,016 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:14,017 INFO L82 PathProgramCache]: Analyzing trace with hash -476642807, now seen corresponding path program 10 times [2020-10-28 14:54:14,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:14,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786198366] [2020-10-28 14:54:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:14,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:14,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:19,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:19,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 14:54:19,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:19,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 14:54:19,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:19,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:54:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:54:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:54:19,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:19,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:19,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:19,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:19,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:19,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:19,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:19,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:19,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:19,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:19,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 14:54:19,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786198366] [2020-10-28 14:54:19,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:19,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:54:19,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563567773] [2020-10-28 14:54:19,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:54:19,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:19,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:54:19,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:54:19,302 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 14 states. [2020-10-28 14:54:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:19,601 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2020-10-28 14:54:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:54:19,601 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-28 14:54:19,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:19,602 INFO L225 Difference]: With dead ends: 93 [2020-10-28 14:54:19,602 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 14:54:19,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:54:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 14:54:19,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-10-28 14:54:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 14:54:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-28 14:54:19,617 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2020-10-28 14:54:19,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:19,618 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-28 14:54:19,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:54:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-28 14:54:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:54:19,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:19,622 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:19,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:54:19,623 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:19,623 INFO L82 PathProgramCache]: Analyzing trace with hash -801421683, now seen corresponding path program 11 times [2020-10-28 14:54:19,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:19,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037239787] [2020-10-28 14:54:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:19,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:19,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:24,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:24,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:54:24,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:24,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 14:54:24,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:24,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:24,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:54:24,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:24,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:54:24,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:24,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:24,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:24,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:24,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:24,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:24,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:24,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:24,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:24,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:24,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:24,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:24,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 14:54:24,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037239787] [2020-10-28 14:54:24,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:24,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:54:24,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340819823] [2020-10-28 14:54:24,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:54:24,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:24,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:54:24,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:54:24,930 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 15 states. [2020-10-28 14:54:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:25,099 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2020-10-28 14:54:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:54:25,100 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-28 14:54:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:25,101 INFO L225 Difference]: With dead ends: 99 [2020-10-28 14:54:25,101 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:54:25,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:54:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:54:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-10-28 14:54:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 14:54:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-28 14:54:25,117 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2020-10-28 14:54:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:25,118 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-28 14:54:25,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:54:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-28 14:54:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 14:54:25,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:25,124 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:25,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:54:25,125 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:25,125 INFO L82 PathProgramCache]: Analyzing trace with hash -229721839, now seen corresponding path program 12 times [2020-10-28 14:54:25,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:25,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813897410] [2020-10-28 14:54:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:25,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:25,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:30,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:30,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:54:30,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:30,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 14:54:30,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:30,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:30,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:54:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 14:54:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:54:30,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:54:30,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:30,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:30,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:30,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:30,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:30,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:30,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:30,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:30,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:30,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:30,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:30,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 14:54:30,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813897410] [2020-10-28 14:54:30,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:30,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:54:30,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053956383] [2020-10-28 14:54:30,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:54:30,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:30,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:54:30,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:54:30,427 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 16 states. [2020-10-28 14:54:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:30,630 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2020-10-28 14:54:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:54:30,630 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-28 14:54:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:30,631 INFO L225 Difference]: With dead ends: 105 [2020-10-28 14:54:30,631 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:54:30,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:54:30,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:54:30,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-10-28 14:54:30,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 14:54:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-28 14:54:30,641 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2020-10-28 14:54:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:30,642 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-28 14:54:30,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:54:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-28 14:54:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 14:54:30,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:30,643 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:30,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:54:30,644 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:30,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1148823147, now seen corresponding path program 13 times [2020-10-28 14:54:30,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:30,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750491129] [2020-10-28 14:54:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:30,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:30,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:35,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:35,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 14:54:35,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:35,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 14:54:35,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:35,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:35,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:54:35,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 14:54:35,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:54:35,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:35,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:35,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:35,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:35,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:35,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:35,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:35,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:35,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:35,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:35,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:35,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:35,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 14:54:35,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750491129] [2020-10-28 14:54:35,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:35,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:54:35,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544997091] [2020-10-28 14:54:35,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:54:35,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:35,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:54:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:54:35,963 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 17 states. [2020-10-28 14:54:36,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:36,154 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2020-10-28 14:54:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:54:36,154 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-28 14:54:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:36,155 INFO L225 Difference]: With dead ends: 111 [2020-10-28 14:54:36,155 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 14:54:36,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:54:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 14:54:36,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-28 14:54:36,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:54:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-28 14:54:36,162 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2020-10-28 14:54:36,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:36,163 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-28 14:54:36,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:54:36,163 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-28 14:54:36,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 14:54:36,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:36,164 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:36,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:54:36,164 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:36,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1813456921, now seen corresponding path program 14 times [2020-10-28 14:54:36,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:36,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548455018] [2020-10-28 14:54:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:36,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:36,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:41,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:41,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 14:54:41,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:41,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 14:54:41,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:41,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:41,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:54:41,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 14:54:41,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:54:41,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:41,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:41,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:41,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:41,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:41,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:41,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:41,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:41,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:41,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:41,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:41,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:41,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-28 14:54:41,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548455018] [2020-10-28 14:54:41,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:41,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:54:41,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90371081] [2020-10-28 14:54:41,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:54:41,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:41,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:54:41,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:54:41,518 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 18 states. [2020-10-28 14:54:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:41,776 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-28 14:54:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:54:41,777 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-10-28 14:54:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:41,778 INFO L225 Difference]: With dead ends: 117 [2020-10-28 14:54:41,778 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:54:41,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:54:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:54:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-28 14:54:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 14:54:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-28 14:54:41,785 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 72 [2020-10-28 14:54:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:41,785 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-28 14:54:41,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:54:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-28 14:54:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 14:54:41,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:41,786 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:41,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:54:41,786 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:41,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:41,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1833556835, now seen corresponding path program 15 times [2020-10-28 14:54:41,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:41,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086267727] [2020-10-28 14:54:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:41,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:41,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:46,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:46,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 14:54:46,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:46,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 14:54:46,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:46,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:46,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:54:46,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 14:54:46,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:54:46,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:47,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:47,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:47,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:47,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:47,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:47,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:47,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:47,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:47,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:47,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:47,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:47,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 14:54:47,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086267727] [2020-10-28 14:54:47,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:47,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:54:47,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332025265] [2020-10-28 14:54:47,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:54:47,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:47,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:54:47,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:54:47,154 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 19 states. [2020-10-28 14:54:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:47,394 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2020-10-28 14:54:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:54:47,394 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2020-10-28 14:54:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:47,395 INFO L225 Difference]: With dead ends: 123 [2020-10-28 14:54:47,395 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 14:54:47,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:54:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 14:54:47,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-10-28 14:54:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 14:54:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-28 14:54:47,409 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2020-10-28 14:54:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:47,409 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-28 14:54:47,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:54:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-28 14:54:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 14:54:47,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:47,410 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:47,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:54:47,410 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:47,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:47,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1936175327, now seen corresponding path program 16 times [2020-10-28 14:54:47,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:47,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122204607] [2020-10-28 14:54:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:47,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:47,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:52,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:52,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 14:54:52,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:52,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 14:54:52,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:52,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:52,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:54:52,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 14:54:52,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:54:52,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:52,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:52,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:52,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:52,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:52,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:52,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:52,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:52,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:52,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:52,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:52,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:52,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-28 14:54:52,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122204607] [2020-10-28 14:54:52,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:52,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:54:52,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343840736] [2020-10-28 14:54:52,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:54:52,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:52,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:54:52,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:54:52,788 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 20 states. [2020-10-28 14:54:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:53,052 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2020-10-28 14:54:53,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:54:53,053 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-10-28 14:54:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:53,054 INFO L225 Difference]: With dead ends: 129 [2020-10-28 14:54:53,054 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 14:54:53,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:54:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 14:54:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-28 14:54:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 14:54:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-28 14:54:53,061 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2020-10-28 14:54:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:53,061 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-28 14:54:53,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:54:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-28 14:54:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 14:54:53,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:53,062 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:53,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:54:53,062 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:53,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:53,063 INFO L82 PathProgramCache]: Analyzing trace with hash 91400101, now seen corresponding path program 17 times [2020-10-28 14:54:53,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:53,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797003292] [2020-10-28 14:54:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:53,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:53,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:58,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:58,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 14:54:58,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:58,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-28 14:54:58,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:58,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:58,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:54:58,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 14:54:58,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:54:58,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:58,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:58,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:58,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:58,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:58,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:58,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:58,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:58,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:58,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 14:54:58,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797003292] [2020-10-28 14:54:58,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:58,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:54:58,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934644575] [2020-10-28 14:54:58,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:54:58,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:58,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:54:58,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:54:58,490 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 21 states. [2020-10-28 14:54:58,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:58,793 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2020-10-28 14:54:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:54:58,793 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-28 14:54:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:58,794 INFO L225 Difference]: With dead ends: 135 [2020-10-28 14:54:58,794 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:54:58,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:54:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:54:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-10-28 14:54:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 14:54:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-28 14:54:58,800 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2020-10-28 14:54:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:58,800 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-28 14:54:58,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:54:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-28 14:54:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 14:54:58,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:58,801 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:58,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:54:58,802 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:58,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2004495913, now seen corresponding path program 18 times [2020-10-28 14:54:58,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:58,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606320604] [2020-10-28 14:54:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:58,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:58,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:03,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:03,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 14:55:03,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:03,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 14:55:03,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:03,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:03,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:55:03,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:03,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:55:03,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:04,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:04,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:04,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:04,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:04,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:04,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:04,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:04,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:04,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:04,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:04,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:04,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-28 14:55:04,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606320604] [2020-10-28 14:55:04,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:04,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:55:04,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59524379] [2020-10-28 14:55:04,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:55:04,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:04,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:55:04,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:55:04,217 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 22 states. [2020-10-28 14:55:04,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:04,538 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2020-10-28 14:55:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:55:04,539 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2020-10-28 14:55:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:04,540 INFO L225 Difference]: With dead ends: 141 [2020-10-28 14:55:04,540 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:55:04,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:55:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:55:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-10-28 14:55:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 14:55:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-28 14:55:04,547 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 88 [2020-10-28 14:55:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:04,547 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-28 14:55:04,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:55:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-28 14:55:04,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 14:55:04,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:04,549 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:04,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:55:04,549 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:04,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1419517267, now seen corresponding path program 19 times [2020-10-28 14:55:04,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:04,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071185160] [2020-10-28 14:55:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:04,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:04,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:09,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:09,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:55:09,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:09,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 14:55:09,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:09,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:09,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:55:09,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:09,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:55:09,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:09,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:10,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:10,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:10,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:10,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:10,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:10,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:10,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:10,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:10,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:10,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:10,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-28 14:55:10,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071185160] [2020-10-28 14:55:10,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:10,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:55:10,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376729158] [2020-10-28 14:55:10,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:55:10,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:10,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:55:10,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:55:10,018 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 23 states. [2020-10-28 14:55:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:10,352 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2020-10-28 14:55:10,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:55:10,352 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2020-10-28 14:55:10,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:10,354 INFO L225 Difference]: With dead ends: 147 [2020-10-28 14:55:10,354 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:55:10,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:55:10,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:55:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-28 14:55:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 14:55:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-28 14:55:10,361 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2020-10-28 14:55:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:10,361 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-28 14:55:10,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:55:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-28 14:55:10,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 14:55:10,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:10,368 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:10,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:55:10,368 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:10,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:10,369 INFO L82 PathProgramCache]: Analyzing trace with hash 946128177, now seen corresponding path program 20 times [2020-10-28 14:55:10,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:10,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449549957] [2020-10-28 14:55:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:10,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:10,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:15,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:15,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 14:55:15,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:15,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 14:55:15,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:15,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:15,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:55:15,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 14:55:15,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:55:15,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:15,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:15,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:15,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:15,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:15,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:15,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:15,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:15,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:15,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:15,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-28 14:55:15,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449549957] [2020-10-28 14:55:15,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:15,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:55:15,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148406508] [2020-10-28 14:55:15,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:55:15,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:15,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:55:15,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:55:15,865 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 24 states. [2020-10-28 14:55:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:16,130 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2020-10-28 14:55:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:55:16,131 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 96 [2020-10-28 14:55:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:16,132 INFO L225 Difference]: With dead ends: 153 [2020-10-28 14:55:16,132 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 14:55:16,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:55:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 14:55:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-10-28 14:55:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 14:55:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-28 14:55:16,142 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2020-10-28 14:55:16,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:16,142 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-28 14:55:16,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:55:16,142 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-28 14:55:16,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 14:55:16,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:16,144 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:16,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:55:16,144 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:16,144 INFO L82 PathProgramCache]: Analyzing trace with hash 70374837, now seen corresponding path program 21 times [2020-10-28 14:55:16,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:16,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714189256] [2020-10-28 14:55:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:16,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:16,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:21,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:21,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 14:55:21,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:21,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-28 14:55:21,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:21,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:55:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:55:21,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:21,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:21,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:21,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:21,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:21,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:21,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:21,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:21,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:21,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:21,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:21,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:21,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-28 14:55:21,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714189256] [2020-10-28 14:55:21,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:21,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:55:21,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965806200] [2020-10-28 14:55:21,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:55:21,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:21,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:55:21,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:55:21,716 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 25 states. [2020-10-28 14:55:22,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:22,069 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2020-10-28 14:55:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:55:22,072 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 100 [2020-10-28 14:55:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:22,073 INFO L225 Difference]: With dead ends: 159 [2020-10-28 14:55:22,073 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 14:55:22,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:55:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 14:55:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-10-28 14:55:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 14:55:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-28 14:55:22,079 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2020-10-28 14:55:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:22,079 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-28 14:55:22,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:55:22,080 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-28 14:55:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 14:55:22,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:22,081 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:22,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:55:22,081 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:22,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1023404999, now seen corresponding path program 22 times [2020-10-28 14:55:22,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:22,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815418795] [2020-10-28 14:55:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:22,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:22,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:27,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:27,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 14:55:27,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:27,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 14:55:27,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:27,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:27,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:55:27,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:27,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:55:27,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:27,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:27,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:27,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:27,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:27,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:27,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:27,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:27,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:27,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:27,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-28 14:55:27,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815418795] [2020-10-28 14:55:27,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:27,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:55:27,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323277044] [2020-10-28 14:55:27,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:55:27,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:27,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:55:27,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:55:27,695 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 26 states. [2020-10-28 14:55:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:28,019 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2020-10-28 14:55:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:55:28,019 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 104 [2020-10-28 14:55:28,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:28,021 INFO L225 Difference]: With dead ends: 165 [2020-10-28 14:55:28,021 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 14:55:28,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:55:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 14:55:28,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-28 14:55:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 14:55:28,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-28 14:55:28,029 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2020-10-28 14:55:28,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:28,030 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-28 14:55:28,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:55:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-28 14:55:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 14:55:28,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:28,031 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:28,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:55:28,032 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:28,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2005172413, now seen corresponding path program 23 times [2020-10-28 14:55:28,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:28,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213652398] [2020-10-28 14:55:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:28,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:28,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:33,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:33,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 14:55:33,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:33,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5132 [2020-10-28 14:55:33,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:33,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:33,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:55:33,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:33,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:55:33,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:33,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:33,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:33,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:33,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:33,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:33,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:33,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:33,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:33,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:33,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:33,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:33,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-28 14:55:33,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213652398] [2020-10-28 14:55:33,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:33,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:55:33,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966319407] [2020-10-28 14:55:33,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:55:33,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:33,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:55:33,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:55:33,748 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 27 states. [2020-10-28 14:55:34,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:34,040 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2020-10-28 14:55:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:55:34,040 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 108 [2020-10-28 14:55:34,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:34,042 INFO L225 Difference]: With dead ends: 171 [2020-10-28 14:55:34,042 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 14:55:34,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:55:34,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 14:55:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-10-28 14:55:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-28 14:55:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-10-28 14:55:34,049 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2020-10-28 14:55:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:34,049 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-10-28 14:55:34,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:55:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-10-28 14:55:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 14:55:34,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:34,050 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:34,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:55:34,051 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash -218883263, now seen corresponding path program 24 times [2020-10-28 14:55:34,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:34,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647371528] [2020-10-28 14:55:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:34,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:37,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:39,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:39,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 14:55:39,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:39,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 14:55:39,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:39,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:39,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:55:39,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-28 14:55:39,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:55:39,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:39,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:39,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:39,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:39,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:39,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:39,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:39,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:39,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:39,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-28 14:55:39,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647371528] [2020-10-28 14:55:39,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:39,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:55:39,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002665761] [2020-10-28 14:55:39,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:55:39,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:39,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:55:39,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:55:39,696 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 28 states. [2020-10-28 14:55:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:40,044 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2020-10-28 14:55:40,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:55:40,046 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2020-10-28 14:55:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:40,047 INFO L225 Difference]: With dead ends: 177 [2020-10-28 14:55:40,047 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:55:40,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:55:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:55:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-28 14:55:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 14:55:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-28 14:55:40,060 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 112 [2020-10-28 14:55:40,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:40,060 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-28 14:55:40,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:55:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-28 14:55:40,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 14:55:40,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:40,065 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:40,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:55:40,065 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:40,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1426318277, now seen corresponding path program 25 times [2020-10-28 14:55:40,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:40,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919374187] [2020-10-28 14:55:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:40,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:40,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:45,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:45,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 14:55:45,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:45,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-28 14:55:45,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:45,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:45,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:55:45,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 14:55:45,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 14:55:45,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:45,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:45,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:45,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:45,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:45,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:45,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:45,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:45,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:45,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:45,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:45,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:45,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-28 14:55:45,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919374187] [2020-10-28 14:55:45,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:45,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:55:45,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992125374] [2020-10-28 14:55:45,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:55:45,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:45,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:55:45,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:55:45,796 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 29 states. [2020-10-28 14:55:46,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:46,183 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2020-10-28 14:55:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:55:46,184 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 116 [2020-10-28 14:55:46,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:46,185 INFO L225 Difference]: With dead ends: 183 [2020-10-28 14:55:46,185 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 14:55:46,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:55:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 14:55:46,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2020-10-28 14:55:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 14:55:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-10-28 14:55:46,192 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2020-10-28 14:55:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:46,192 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-10-28 14:55:46,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:55:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-10-28 14:55:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 14:55:46,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:46,194 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:46,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:55:46,194 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:46,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:46,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1947674039, now seen corresponding path program 26 times [2020-10-28 14:55:46,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:46,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475142190] [2020-10-28 14:55:46,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:46,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:46,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:51,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:51,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 14:55:51,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:51,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-28 14:55:51,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:51,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:51,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:55:51,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-28 14:55:51,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 14:55:51,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:51,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:51,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:51,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:51,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:51,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:51,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:51,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:51,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:51,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:51,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:51,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:51,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-28 14:55:51,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475142190] [2020-10-28 14:55:51,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:51,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 14:55:51,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638739524] [2020-10-28 14:55:51,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 14:55:51,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:51,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 14:55:51,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:55:51,974 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 30 states. [2020-10-28 14:55:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:52,359 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2020-10-28 14:55:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:55:52,359 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2020-10-28 14:55:52,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:52,360 INFO L225 Difference]: With dead ends: 189 [2020-10-28 14:55:52,360 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 14:55:52,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:55:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 14:55:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2020-10-28 14:55:52,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 14:55:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2020-10-28 14:55:52,373 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 120 [2020-10-28 14:55:52,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:52,374 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2020-10-28 14:55:52,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 14:55:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2020-10-28 14:55:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 14:55:52,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:52,375 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:52,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:55:52,375 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:52,376 INFO L82 PathProgramCache]: Analyzing trace with hash -732430643, now seen corresponding path program 27 times [2020-10-28 14:55:52,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:52,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635477847] [2020-10-28 14:55:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:52,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:57,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:57,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 14:55:57,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:57,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-28 14:55:57,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:57,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:57,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:55:57,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:57,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 14:55:57,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:58,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:58,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:58,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:58,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:58,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:58,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:58,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:58,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:58,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:58,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:58,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:58,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-28 14:55:58,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635477847] [2020-10-28 14:55:58,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:58,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:55:58,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663474065] [2020-10-28 14:55:58,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:55:58,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:58,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:55:58,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:55:58,243 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 31 states. [2020-10-28 14:55:58,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:58,621 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2020-10-28 14:55:58,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:55:58,622 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 124 [2020-10-28 14:55:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:58,623 INFO L225 Difference]: With dead ends: 195 [2020-10-28 14:55:58,623 INFO L226 Difference]: Without dead ends: 131 [2020-10-28 14:55:58,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:55:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-28 14:55:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-10-28 14:55:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 14:55:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2020-10-28 14:55:58,631 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2020-10-28 14:55:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:58,631 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2020-10-28 14:55:58,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 14:55:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2020-10-28 14:55:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 14:55:58,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:58,632 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:58,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:55:58,633 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash 965103953, now seen corresponding path program 28 times [2020-10-28 14:55:58,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:58,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607349813] [2020-10-28 14:55:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:58,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:03,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:03,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 14:56:03,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:03,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-28 14:56:03,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:03,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 14:56:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 14:56:03,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:04,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:04,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:04,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:04,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:04,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:04,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:04,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:04,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:04,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:04,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:04,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:04,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-28 14:56:04,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607349813] [2020-10-28 14:56:04,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:04,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 14:56:04,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779347079] [2020-10-28 14:56:04,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 14:56:04,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:04,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 14:56:04,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:56:04,499 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 32 states. [2020-10-28 14:56:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:04,933 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2020-10-28 14:56:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 14:56:04,933 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2020-10-28 14:56:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:04,935 INFO L225 Difference]: With dead ends: 201 [2020-10-28 14:56:04,935 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 14:56:04,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:56:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 14:56:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-10-28 14:56:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 14:56:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-10-28 14:56:04,943 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2020-10-28 14:56:04,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:04,944 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-10-28 14:56:04,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 14:56:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-10-28 14:56:04,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 14:56:04,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:04,945 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:04,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:56:04,946 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:04,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:04,946 INFO L82 PathProgramCache]: Analyzing trace with hash 354996693, now seen corresponding path program 29 times [2020-10-28 14:56:04,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:04,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670868124] [2020-10-28 14:56:04,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:05,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:10,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:10,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 14:56:10,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:10,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-28 14:56:10,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:10,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:10,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:56:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 14:56:10,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:10,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:10,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:10,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:10,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:10,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:10,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:10,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:10,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:10,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-28 14:56:10,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670868124] [2020-10-28 14:56:10,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:10,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 14:56:10,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198647902] [2020-10-28 14:56:10,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 14:56:10,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:10,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 14:56:10,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:56:10,865 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 33 states. [2020-10-28 14:56:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:11,333 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2020-10-28 14:56:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 14:56:11,334 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 132 [2020-10-28 14:56:11,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:11,335 INFO L225 Difference]: With dead ends: 207 [2020-10-28 14:56:11,335 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 14:56:11,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:56:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 14:56:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-28 14:56:11,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 14:56:11,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-28 14:56:11,343 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2020-10-28 14:56:11,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:11,343 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-28 14:56:11,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 14:56:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-28 14:56:11,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 14:56:11,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:11,344 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:11,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:56:11,345 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1888190375, now seen corresponding path program 30 times [2020-10-28 14:56:11,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:11,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208378604] [2020-10-28 14:56:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:11,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:16,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:16,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 14:56:16,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:16,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-28 14:56:16,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:16,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 14:56:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 14:56:16,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:17,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:17,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:17,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:17,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:17,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:17,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:56:17,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:17,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:17,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:17,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:17,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:17,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-28 14:56:17,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208378604] [2020-10-28 14:56:17,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:17,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 14:56:17,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949039957] [2020-10-28 14:56:17,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 14:56:17,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:17,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 14:56:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:56:17,290 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 34 states. [2020-10-28 14:56:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:17,780 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2020-10-28 14:56:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 14:56:17,781 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-10-28 14:56:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:17,782 INFO L225 Difference]: With dead ends: 213 [2020-10-28 14:56:17,782 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 14:56:17,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:56:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 14:56:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2020-10-28 14:56:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-28 14:56:17,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-10-28 14:56:17,796 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 136 [2020-10-28 14:56:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:17,796 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-10-28 14:56:17,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 14:56:17,798 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-10-28 14:56:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-28 14:56:17,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:17,799 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:17,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:56:17,799 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:17,801 INFO L82 PathProgramCache]: Analyzing trace with hash 522083549, now seen corresponding path program 31 times [2020-10-28 14:56:17,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:17,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949115557] [2020-10-28 14:56:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:17,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:22,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:22,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-28 14:56:22,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:22,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 14:56:22,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:22,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:22,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 14:56:22,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:22,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 14:56:22,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:23,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:23,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:23,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:23,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:23,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:23,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:23,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:23,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:23,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:23,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:23,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:23,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-28 14:56:23,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949115557] [2020-10-28 14:56:23,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:23,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 14:56:23,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788681579] [2020-10-28 14:56:23,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 14:56:23,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:23,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 14:56:23,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:56:23,781 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 35 states. [2020-10-28 14:56:24,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:24,274 INFO L93 Difference]: Finished difference Result 219 states and 222 transitions. [2020-10-28 14:56:24,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 14:56:24,275 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 140 [2020-10-28 14:56:24,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:24,277 INFO L225 Difference]: With dead ends: 219 [2020-10-28 14:56:24,277 INFO L226 Difference]: Without dead ends: 147 [2020-10-28 14:56:24,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:56:24,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-28 14:56:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2020-10-28 14:56:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-28 14:56:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-10-28 14:56:24,285 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2020-10-28 14:56:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:24,285 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-10-28 14:56:24,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 14:56:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-10-28 14:56:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-28 14:56:24,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:24,287 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:24,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:56:24,287 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:24,287 INFO L82 PathProgramCache]: Analyzing trace with hash 156985185, now seen corresponding path program 32 times [2020-10-28 14:56:24,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:24,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301881016] [2020-10-28 14:56:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:24,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:29,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:29,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 14:56:29,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:29,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5287 [2020-10-28 14:56:29,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:29,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:29,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 14:56:29,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:29,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 14:56:29,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:30,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:30,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:30,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:30,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:30,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:30,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:56:30,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:30,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:30,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:30,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:30,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:30,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-28 14:56:30,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301881016] [2020-10-28 14:56:30,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:30,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 14:56:30,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563407286] [2020-10-28 14:56:30,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 14:56:30,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:30,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 14:56:30,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:56:30,486 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 36 states. [2020-10-28 14:56:31,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:31,008 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2020-10-28 14:56:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 14:56:31,009 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 144 [2020-10-28 14:56:31,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:31,010 INFO L225 Difference]: With dead ends: 225 [2020-10-28 14:56:31,010 INFO L226 Difference]: Without dead ends: 151 [2020-10-28 14:56:31,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:56:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-28 14:56:31,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-10-28 14:56:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 14:56:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2020-10-28 14:56:31,018 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2020-10-28 14:56:31,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:31,018 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2020-10-28 14:56:31,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 14:56:31,018 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2020-10-28 14:56:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-28 14:56:31,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:31,019 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:31,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:56:31,020 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:31,020 INFO L82 PathProgramCache]: Analyzing trace with hash -505372699, now seen corresponding path program 33 times [2020-10-28 14:56:31,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:31,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838911667] [2020-10-28 14:56:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:31,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:36,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:36,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-28 14:56:36,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:36,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 14:56:36,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:36,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 14:56:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 14:56:36,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:37,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:37,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:37,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:37,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:37,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:37,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:37,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:37,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:37,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-28 14:56:37,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838911667] [2020-10-28 14:56:37,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:37,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 14:56:37,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118437658] [2020-10-28 14:56:37,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 14:56:37,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:37,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 14:56:37,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:56:37,027 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 37 states. [2020-10-28 14:56:37,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:37,400 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2020-10-28 14:56:37,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 14:56:37,401 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 148 [2020-10-28 14:56:37,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:37,402 INFO L225 Difference]: With dead ends: 231 [2020-10-28 14:56:37,403 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 14:56:37,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:56:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 14:56:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-10-28 14:56:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-28 14:56:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-10-28 14:56:37,411 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2020-10-28 14:56:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:37,411 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-10-28 14:56:37,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 14:56:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-10-28 14:56:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-28 14:56:37,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:37,412 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:37,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:56:37,413 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash 182650473, now seen corresponding path program 34 times [2020-10-28 14:56:37,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:37,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347794386] [2020-10-28 14:56:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:42,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:42,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-28 14:56:42,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:42,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5304 [2020-10-28 14:56:42,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:42,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 14:56:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 14:56:42,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:43,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:43,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:43,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:43,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:43,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:43,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:43,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:43,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:43,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:43,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:43,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:43,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-28 14:56:43,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347794386] [2020-10-28 14:56:43,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:43,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 14:56:43,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631861699] [2020-10-28 14:56:43,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 14:56:43,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:43,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 14:56:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:56:43,741 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 38 states. [2020-10-28 14:56:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:44,299 INFO L93 Difference]: Finished difference Result 237 states and 240 transitions. [2020-10-28 14:56:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 14:56:44,300 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 152 [2020-10-28 14:56:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:44,302 INFO L225 Difference]: With dead ends: 237 [2020-10-28 14:56:44,302 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 14:56:44,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:56:44,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 14:56:44,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-28 14:56:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 14:56:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-28 14:56:44,310 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2020-10-28 14:56:44,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:44,311 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-28 14:56:44,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 14:56:44,311 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-28 14:56:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-28 14:56:44,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:44,312 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:44,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:56:44,312 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:44,313 INFO L82 PathProgramCache]: Analyzing trace with hash 890739437, now seen corresponding path program 35 times [2020-10-28 14:56:44,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:44,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664243689] [2020-10-28 14:56:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:44,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:49,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:49,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-28 14:56:49,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:49,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5307 [2020-10-28 14:56:49,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:49,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 14:56:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 14:56:49,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:50,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:50,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:50,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:50,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:50,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:50,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:50,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:50,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:50,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:50,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:50,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:50,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-28 14:56:50,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664243689] [2020-10-28 14:56:50,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:50,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 14:56:50,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7166354] [2020-10-28 14:56:50,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 14:56:50,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:50,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 14:56:50,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:56:50,712 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 39 states. [2020-10-28 14:56:51,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:51,297 INFO L93 Difference]: Finished difference Result 243 states and 246 transitions. [2020-10-28 14:56:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 14:56:51,297 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 156 [2020-10-28 14:56:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:51,299 INFO L225 Difference]: With dead ends: 243 [2020-10-28 14:56:51,299 INFO L226 Difference]: Without dead ends: 163 [2020-10-28 14:56:51,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:56:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-28 14:56:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2020-10-28 14:56:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-28 14:56:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2020-10-28 14:56:51,307 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2020-10-28 14:56:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:51,308 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2020-10-28 14:56:51,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 14:56:51,308 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2020-10-28 14:56:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-28 14:56:51,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:51,309 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:51,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:56:51,309 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:51,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:51,310 INFO L82 PathProgramCache]: Analyzing trace with hash -541893263, now seen corresponding path program 36 times [2020-10-28 14:56:51,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:51,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827285415] [2020-10-28 14:56:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:51,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:56,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:56,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-28 14:56:56,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:56,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-28 14:56:56,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:56,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 14:56:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 14:56:56,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:57,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:57,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:57,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:57,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:57,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:57,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:56:57,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:57,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:57,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:57,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:57,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:57,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-28 14:56:57,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827285415] [2020-10-28 14:56:57,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:57,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 14:56:57,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282118524] [2020-10-28 14:56:57,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 14:56:57,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:57,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 14:56:57,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:56:57,542 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 40 states. [2020-10-28 14:56:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:58,104 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2020-10-28 14:56:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 14:56:58,105 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 160 [2020-10-28 14:56:58,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:58,106 INFO L225 Difference]: With dead ends: 249 [2020-10-28 14:56:58,107 INFO L226 Difference]: Without dead ends: 167 [2020-10-28 14:56:58,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:56:58,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-28 14:56:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2020-10-28 14:56:58,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-28 14:56:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2020-10-28 14:56:58,114 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 160 [2020-10-28 14:56:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:58,115 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2020-10-28 14:56:58,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 14:56:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2020-10-28 14:56:58,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-28 14:56:58,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:58,116 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:58,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:56:58,116 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:58,116 INFO L82 PathProgramCache]: Analyzing trace with hash -664056331, now seen corresponding path program 37 times [2020-10-28 14:56:58,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:58,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987986297] [2020-10-28 14:56:58,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:58,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:03,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:03,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-28 14:57:03,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:03,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5377 [2020-10-28 14:57:03,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:03,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:03,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 14:57:03,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:03,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 14:57:03,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:04,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:04,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:04,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:04,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:04,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:04,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:04,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:04,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:04,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:04,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:04,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:04,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-28 14:57:04,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987986297] [2020-10-28 14:57:04,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:04,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 14:57:04,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659533247] [2020-10-28 14:57:04,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 14:57:04,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:04,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 14:57:04,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:57:04,703 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 41 states. [2020-10-28 14:57:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:05,203 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2020-10-28 14:57:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 14:57:05,203 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 164 [2020-10-28 14:57:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:05,205 INFO L225 Difference]: With dead ends: 255 [2020-10-28 14:57:05,205 INFO L226 Difference]: Without dead ends: 171 [2020-10-28 14:57:05,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:57:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-28 14:57:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-10-28 14:57:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 14:57:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2020-10-28 14:57:05,213 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2020-10-28 14:57:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:05,214 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2020-10-28 14:57:05,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 14:57:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2020-10-28 14:57:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-28 14:57:05,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:05,215 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:05,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:57:05,215 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:05,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:05,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1149997959, now seen corresponding path program 38 times [2020-10-28 14:57:05,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:05,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492482937] [2020-10-28 14:57:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:05,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:10,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:10,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 14:57:10,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:10,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5319 [2020-10-28 14:57:10,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:10,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:10,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 14:57:10,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:10,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 14:57:10,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:11,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:11,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:11,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:11,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:11,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:11,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:11,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:11,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:11,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-28 14:57:11,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492482937] [2020-10-28 14:57:11,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:11,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 14:57:11,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113896468] [2020-10-28 14:57:11,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 14:57:11,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 14:57:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:57:11,772 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 42 states. [2020-10-28 14:57:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:12,374 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2020-10-28 14:57:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 14:57:12,375 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 168 [2020-10-28 14:57:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:12,376 INFO L225 Difference]: With dead ends: 261 [2020-10-28 14:57:12,376 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 14:57:12,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:57:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 14:57:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2020-10-28 14:57:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-28 14:57:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2020-10-28 14:57:12,387 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 168 [2020-10-28 14:57:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:12,388 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2020-10-28 14:57:12,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 14:57:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2020-10-28 14:57:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-28 14:57:12,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:12,389 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:12,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:57:12,389 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:12,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1938012413, now seen corresponding path program 39 times [2020-10-28 14:57:12,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:12,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540323770] [2020-10-28 14:57:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:12,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:12,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:17,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:17,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-28 14:57:17,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:17,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-28 14:57:17,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:17,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:17,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 14:57:17,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-28 14:57:17,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 14:57:17,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:18,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:18,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:18,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:18,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:18,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:18,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:18,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:18,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:18,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:18,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:18,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:18,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-28 14:57:18,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540323770] [2020-10-28 14:57:18,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:18,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 14:57:18,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522269256] [2020-10-28 14:57:18,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 14:57:18,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 14:57:18,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:57:18,815 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 43 states. [2020-10-28 14:57:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:19,464 INFO L93 Difference]: Finished difference Result 267 states and 270 transitions. [2020-10-28 14:57:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 14:57:19,465 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 172 [2020-10-28 14:57:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:19,467 INFO L225 Difference]: With dead ends: 267 [2020-10-28 14:57:19,467 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 14:57:19,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:57:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 14:57:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-28 14:57:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-28 14:57:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-10-28 14:57:19,476 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2020-10-28 14:57:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:19,476 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-10-28 14:57:19,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 14:57:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-10-28 14:57:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-28 14:57:19,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:19,477 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:19,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:57:19,478 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:19,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1177668735, now seen corresponding path program 40 times [2020-10-28 14:57:19,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:19,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577691229] [2020-10-28 14:57:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:19,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:24,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:24,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-28 14:57:24,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:24,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5138 [2020-10-28 14:57:24,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:24,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:24,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 14:57:24,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:24,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 14:57:24,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:25,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:25,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:25,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:25,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:25,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:25,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:25,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:25,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:25,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:25,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:25,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:25,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-28 14:57:25,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577691229] [2020-10-28 14:57:25,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:25,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 14:57:25,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002884254] [2020-10-28 14:57:25,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 14:57:25,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:25,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 14:57:25,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:57:25,996 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 44 states. [2020-10-28 14:57:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:26,651 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2020-10-28 14:57:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 14:57:26,652 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 176 [2020-10-28 14:57:26,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:26,653 INFO L225 Difference]: With dead ends: 273 [2020-10-28 14:57:26,654 INFO L226 Difference]: Without dead ends: 183 [2020-10-28 14:57:26,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:57:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-28 14:57:26,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-10-28 14:57:26,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-28 14:57:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2020-10-28 14:57:26,661 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 176 [2020-10-28 14:57:26,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:26,662 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2020-10-28 14:57:26,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 14:57:26,662 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2020-10-28 14:57:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-28 14:57:26,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:26,663 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:26,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:57:26,663 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:26,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:26,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1777804283, now seen corresponding path program 41 times [2020-10-28 14:57:26,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:26,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555715092] [2020-10-28 14:57:26,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:26,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:31,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:31,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-28 14:57:31,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:31,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5241 [2020-10-28 14:57:31,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:31,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 14:57:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 14:57:31,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:33,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:33,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:33,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:33,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:33,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:33,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:57:33,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:33,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:33,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:33,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:33,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:33,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2020-10-28 14:57:33,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555715092] [2020-10-28 14:57:33,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:33,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 14:57:33,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643088186] [2020-10-28 14:57:33,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 14:57:33,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:33,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 14:57:33,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:57:33,355 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 45 states. [2020-10-28 14:57:33,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:33,963 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2020-10-28 14:57:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 14:57:33,964 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 180 [2020-10-28 14:57:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:33,965 INFO L225 Difference]: With dead ends: 279 [2020-10-28 14:57:33,965 INFO L226 Difference]: Without dead ends: 187 [2020-10-28 14:57:33,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:57:33,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-28 14:57:33,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2020-10-28 14:57:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-28 14:57:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2020-10-28 14:57:33,975 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 180 [2020-10-28 14:57:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:33,975 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2020-10-28 14:57:33,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 14:57:33,976 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2020-10-28 14:57:33,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-28 14:57:33,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:33,977 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:33,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:57:33,977 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:33,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:33,978 INFO L82 PathProgramCache]: Analyzing trace with hash -563563895, now seen corresponding path program 42 times [2020-10-28 14:57:33,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:33,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778280054] [2020-10-28 14:57:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:34,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking...