/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:29:16,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:29:16,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:29:16,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:29:16,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:29:16,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:29:16,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:29:16,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:29:16,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:29:16,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:29:16,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:29:16,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:29:16,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:29:16,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:29:16,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:29:16,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:29:16,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:29:16,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:29:16,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:29:16,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:29:16,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:29:16,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:29:16,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:29:16,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:29:16,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:29:16,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:29:16,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:29:16,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:29:16,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:29:16,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:29:16,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:29:16,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:29:16,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:29:16,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:29:16,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:29:16,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:29:16,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:29:16,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:29:16,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:29:16,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:29:16,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:29:16,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:29:16,217 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:29:16,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:29:16,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:29:16,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:29:16,219 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:29:16,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:29:16,220 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:29:16,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:29:16,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:29:16,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:29:16,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:29:16,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:29:16,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:29:16,221 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:29:16,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:29:16,221 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:29:16,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:29:16,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:29:16,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:29:16,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:29:16,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:29:16,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:29:16,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:29:16,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:29:16,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:29:16,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:29:16,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:29:16,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:29:16,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:29:16,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:29:16,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:29:16,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:29:16,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:29:16,683 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:29:16,683 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:29:16,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2020-10-27 20:29:16,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65c94300f/17cc4157008d47c9bf9886042069ef8e/FLAGe37ecd1db [2020-10-27 20:29:17,435 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:29:17,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2020-10-27 20:29:17,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65c94300f/17cc4157008d47c9bf9886042069ef8e/FLAGe37ecd1db [2020-10-27 20:29:17,805 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65c94300f/17cc4157008d47c9bf9886042069ef8e [2020-10-27 20:29:17,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:29:17,816 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:29:17,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:29:17,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:29:17,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:29:17,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:29:17" (1/1) ... [2020-10-27 20:29:17,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@282d4e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:17, skipping insertion in model container [2020-10-27 20:29:17,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:29:17" (1/1) ... [2020-10-27 20:29:17,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:29:17,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:29:18,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:29:18,153 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:29:18,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:29:18,195 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:29:18,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:18 WrapperNode [2020-10-27 20:29:18,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:29:18,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:29:18,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:29:18,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:29:18,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:18" (1/1) ... [2020-10-27 20:29:18,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:18" (1/1) ... [2020-10-27 20:29:18,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:18" (1/1) ... [2020-10-27 20:29:18,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:18" (1/1) ... [2020-10-27 20:29:18,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:18" (1/1) ... [2020-10-27 20:29:18,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:18" (1/1) ... [2020-10-27 20:29:18,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:18" (1/1) ... [2020-10-27 20:29:18,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:29:18,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:29:18,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:29:18,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:29:18,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:29:18,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:29:18,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:29:18,353 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:29:18,353 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:29:18,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:29:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:29:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:29:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:29:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:29:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:29:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:29:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:29:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:29:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:29:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:29:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:29:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:29:18,605 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:29:18,606 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:29:18,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:29:18 BoogieIcfgContainer [2020-10-27 20:29:18,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:29:18,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:29:18,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:29:18,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:29:18,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:29:17" (1/3) ... [2020-10-27 20:29:18,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c3db5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:29:18, skipping insertion in model container [2020-10-27 20:29:18,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:18" (2/3) ... [2020-10-27 20:29:18,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c3db5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:29:18, skipping insertion in model container [2020-10-27 20:29:18,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:29:18" (3/3) ... [2020-10-27 20:29:18,618 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2020-10-27 20:29:18,632 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:29:18,643 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:29:18,684 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:29:18,763 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:29:18,764 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:29:18,764 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:29:18,764 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:29:18,764 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:29:18,764 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:29:18,765 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:29:18,765 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:29:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 20:29:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:29:18,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:18,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:18,815 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:18,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1007641703, now seen corresponding path program 1 times [2020-10-27 20:29:18,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:18,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105290362] [2020-10-27 20:29:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:19,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:19,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:29:19,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:19,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-27 20:29:19,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:19,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:19,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:29:19,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:19,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:29:19,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:19,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:19,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:19,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:19,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:29:19,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:19,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:19,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:19,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:19,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:19,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105290362] [2020-10-27 20:29:19,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:29:19,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:29:19,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192077667] [2020-10-27 20:29:19,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:29:19,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:19,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:29:19,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:29:19,626 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 20:29:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:19,692 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-10-27 20:29:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:29:19,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 20:29:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:19,703 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:29:19,703 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:29:19,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:29:19,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:29:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:29:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:29:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-27 20:29:19,752 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 13 [2020-10-27 20:29:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:19,752 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-27 20:29:19,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:29:19,752 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-27 20:29:19,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:29:19,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:19,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:19,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:29:19,754 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:19,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:19,755 INFO L82 PathProgramCache]: Analyzing trace with hash 722539485, now seen corresponding path program 1 times [2020-10-27 20:29:19,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:19,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118163052] [2020-10-27 20:29:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:19,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:20,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:29:20,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:20,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 20:29:20,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:20,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:29:20,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:29:20,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:29:20,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:29:20,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:20,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:20,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:20,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:20,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:29:20,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:20,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:29:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:20,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118163052] [2020-10-27 20:29:20,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:29:20,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:29:20,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423707953] [2020-10-27 20:29:20,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:29:20,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:20,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:29:20,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:29:20,176 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-10-27 20:29:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:20,265 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-27 20:29:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:29:20,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 20:29:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:20,267 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:29:20,267 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:29:20,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:29:20,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:29:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 20:29:20,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:29:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-27 20:29:20,289 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-27 20:29:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:20,289 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-27 20:29:20,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:29:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-27 20:29:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:29:20,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:20,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:20,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:29:20,291 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:20,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1836926234, now seen corresponding path program 1 times [2020-10-27 20:29:20,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:20,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395592890] [2020-10-27 20:29:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:20,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:20,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:29:20,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:29:20,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-27 20:29:20,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:29:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:20,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:29:20,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:20,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:20,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:20,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:20,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:20,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:29:20,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:20,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:20,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:20,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:20,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:20,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395592890] [2020-10-27 20:29:20,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:29:20,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:29:20,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618830612] [2020-10-27 20:29:20,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:29:20,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:20,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:29:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:29:20,445 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-27 20:29:20,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:20,533 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-10-27 20:29:20,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:29:20,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 20:29:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:20,535 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:29:20,535 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:29:20,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:29:20,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:29:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-27 20:29:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:29:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-27 20:29:20,543 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-10-27 20:29:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:20,544 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-27 20:29:20,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:29:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-27 20:29:20,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:29:20,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:20,545 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:20,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:29:20,546 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:20,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:20,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1788578603, now seen corresponding path program 1 times [2020-10-27 20:29:20,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:20,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200466523] [2020-10-27 20:29:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:20,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:20,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:29:20,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:20,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 20:29:20,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:20,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:29:20,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:20,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:29:20,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:20,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:20,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:20,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:20,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:20,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:29:20,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:20,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:20,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:20,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:20,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:20,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200466523] [2020-10-27 20:29:20,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:20,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:29:20,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394750785] [2020-10-27 20:29:20,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:29:20,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:20,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:29:20,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:29:20,738 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-10-27 20:29:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:20,864 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-10-27 20:29:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:29:20,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 20:29:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:20,867 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:29:20,867 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:29:20,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:29:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:29:20,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 20:29:20,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:29:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-27 20:29:20,875 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2020-10-27 20:29:20,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:20,876 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-27 20:29:20,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:29:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-27 20:29:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:29:20,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:20,877 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:20,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:29:20,877 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:20,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:20,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1614717392, now seen corresponding path program 2 times [2020-10-27 20:29:20,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:20,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414248225] [2020-10-27 20:29:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:20,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:21,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:29:21,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:21,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-27 20:29:21,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:29:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:29:21,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:21,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:21,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:21,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:21,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:21,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:29:21,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:21,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:21,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:21,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:21,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:21,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414248225] [2020-10-27 20:29:21,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:21,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:29:21,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869741767] [2020-10-27 20:29:21,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:29:21,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:21,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:29:21,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:29:21,107 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-10-27 20:29:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:21,281 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-10-27 20:29:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:29:21,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 20:29:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:21,282 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:29:21,283 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:29:21,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:29:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:29:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 20:29:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:29:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-27 20:29:21,290 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 19 [2020-10-27 20:29:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:21,290 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-27 20:29:21,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:29:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-27 20:29:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:29:21,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:21,292 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:21,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:29:21,292 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash -582910965, now seen corresponding path program 3 times [2020-10-27 20:29:21,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:21,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428934658] [2020-10-27 20:29:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:21,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:21,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:29:21,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:21,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-27 20:29:21,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:21,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:29:21,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:21,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:29:21,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:21,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:21,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:21,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:21,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:21,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:29:21,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:21,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:21,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:21,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:21,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:21,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428934658] [2020-10-27 20:29:21,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:21,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:29:21,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292629152] [2020-10-27 20:29:21,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:29:21,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:21,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:29:21,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:29:21,569 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2020-10-27 20:29:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:21,774 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-10-27 20:29:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:29:21,774 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:29:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:21,775 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:29:21,775 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:29:21,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:29:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:29:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-27 20:29:21,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:29:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-27 20:29:21,782 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 21 [2020-10-27 20:29:21,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:21,782 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-27 20:29:21,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:29:21,783 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-27 20:29:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:29:21,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:21,784 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:21,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:29:21,784 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:21,785 INFO L82 PathProgramCache]: Analyzing trace with hash 620147590, now seen corresponding path program 4 times [2020-10-27 20:29:21,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:21,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692355399] [2020-10-27 20:29:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:21,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:22,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:22,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:29:22,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:22,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 20:29:22,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:29:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:29:22,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:22,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:22,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:22,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:22,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:22,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:22,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:29:22,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:22,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:22,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692355399] [2020-10-27 20:29:22,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:22,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:29:22,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705277147] [2020-10-27 20:29:22,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:29:22,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:22,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:29:22,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:29:22,094 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 8 states. [2020-10-27 20:29:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:22,322 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-10-27 20:29:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:29:22,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 20:29:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:22,324 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:29:22,324 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:29:22,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:29:22,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:29:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 20:29:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:29:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-27 20:29:22,331 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 23 [2020-10-27 20:29:22,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:22,331 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-27 20:29:22,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:29:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-27 20:29:22,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:29:22,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:22,333 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:22,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:29:22,333 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:22,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:22,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1413216321, now seen corresponding path program 5 times [2020-10-27 20:29:22,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:22,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150740630] [2020-10-27 20:29:22,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:22,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:22,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:22,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:22,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:22,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:29:22,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:22,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-27 20:29:22,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:29:22,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:22,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:29:22,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:22,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:22,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:22,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:22,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:22,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:22,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:22,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:22,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:22,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:22,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:22,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:22,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150740630] [2020-10-27 20:29:22,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:22,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:29:22,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136587320] [2020-10-27 20:29:22,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:29:22,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:29:22,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:29:22,669 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 9 states. [2020-10-27 20:29:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:22,941 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-10-27 20:29:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:29:22,941 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 20:29:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:22,942 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:29:22,943 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:29:22,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:29:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:29:22,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-27 20:29:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:29:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-10-27 20:29:22,950 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 25 [2020-10-27 20:29:22,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:22,950 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-10-27 20:29:22,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:29:22,951 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-10-27 20:29:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:29:22,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:22,952 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:22,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:29:22,952 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:22,953 INFO L82 PathProgramCache]: Analyzing trace with hash -951911876, now seen corresponding path program 6 times [2020-10-27 20:29:22,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:22,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425289143] [2020-10-27 20:29:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:22,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:22,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:23,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:29:23,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:23,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-27 20:29:23,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:23,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:29:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:29:23,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:23,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:23,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:23,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:23,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:23,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:23,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:23,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:23,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:23,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:23,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:23,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425289143] [2020-10-27 20:29:23,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:23,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:29:23,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525711886] [2020-10-27 20:29:23,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:29:23,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:23,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:29:23,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:29:23,340 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 10 states. [2020-10-27 20:29:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:23,705 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2020-10-27 20:29:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:29:23,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 20:29:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:23,707 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:29:23,707 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:29:23,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:29:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:29:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 20:29:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:29:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-27 20:29:23,714 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 27 [2020-10-27 20:29:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:23,714 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-27 20:29:23,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:29:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-27 20:29:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:29:23,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:23,716 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:23,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:29:23,716 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1802409609, now seen corresponding path program 7 times [2020-10-27 20:29:23,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:23,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054151621] [2020-10-27 20:29:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:23,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:24,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:24,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:29:24,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:24,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-27 20:29:24,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:24,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:29:24,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:24,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:29:24,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:24,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:24,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:24,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:24,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:24,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:24,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:24,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:24,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:24,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:24,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:24,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:24,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054151621] [2020-10-27 20:29:24,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:24,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:29:24,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030442452] [2020-10-27 20:29:24,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:29:24,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:29:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:29:24,215 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 11 states. [2020-10-27 20:29:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:24,677 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-10-27 20:29:24,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:29:24,678 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 20:29:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:24,679 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:29:24,679 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:29:24,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:29:24,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:29:24,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 20:29:24,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:29:24,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-10-27 20:29:24,687 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 29 [2020-10-27 20:29:24,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:24,687 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-10-27 20:29:24,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:29:24,688 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-10-27 20:29:24,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:29:24,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:24,688 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:24,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:29:24,689 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1208022514, now seen corresponding path program 8 times [2020-10-27 20:29:24,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:24,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181220315] [2020-10-27 20:29:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:24,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:24,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:24,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:25,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:25,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:29:25,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:25,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-27 20:29:25,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:25,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:29:25,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:25,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:29:25,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:25,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:25,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:25,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:25,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:25,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:25,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:25,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:25,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:25,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181220315] [2020-10-27 20:29:25,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:25,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:29:25,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140840382] [2020-10-27 20:29:25,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:29:25,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:25,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:29:25,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:29:25,229 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 12 states. [2020-10-27 20:29:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:25,678 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-10-27 20:29:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:29:25,679 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 20:29:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:25,680 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:29:25,681 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 20:29:25,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:29:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 20:29:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-27 20:29:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 20:29:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-10-27 20:29:25,690 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 31 [2020-10-27 20:29:25,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:25,691 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-10-27 20:29:25,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:29:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-10-27 20:29:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:29:25,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:25,692 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:25,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:29:25,692 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:25,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash -574664787, now seen corresponding path program 9 times [2020-10-27 20:29:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:25,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970613992] [2020-10-27 20:29:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:25,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:25,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:25,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:26,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:26,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:29:26,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:26,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-27 20:29:26,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:26,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:29:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:29:26,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:26,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:26,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:26,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:26,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:26,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:26,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:26,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:26,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:26,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:26,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:26,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:26,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970613992] [2020-10-27 20:29:26,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:26,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:29:26,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574955485] [2020-10-27 20:29:26,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:29:26,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:26,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:29:26,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:29:26,361 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 13 states. [2020-10-27 20:29:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:26,897 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2020-10-27 20:29:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:29:26,898 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 20:29:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:26,899 INFO L225 Difference]: With dead ends: 44 [2020-10-27 20:29:26,899 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:29:26,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:29:26,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:29:26,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 20:29:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:29:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2020-10-27 20:29:26,909 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2020-10-27 20:29:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:26,909 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2020-10-27 20:29:26,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:29:26,909 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2020-10-27 20:29:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:29:26,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:26,910 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:26,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:29:26,911 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:26,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:26,911 INFO L82 PathProgramCache]: Analyzing trace with hash -45209944, now seen corresponding path program 10 times [2020-10-27 20:29:26,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:26,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613204988] [2020-10-27 20:29:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:26,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:26,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:27,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:27,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:27,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:29:27,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:27,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-27 20:29:27,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:27,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:29:27,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:27,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:29:27,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:27,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:27,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:27,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:27,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:27,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:27,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:27,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:27,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:27,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:27,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:27,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:27,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613204988] [2020-10-27 20:29:27,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:27,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:29:27,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762227826] [2020-10-27 20:29:27,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:29:27,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:27,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:29:27,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:29:27,625 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand 14 states. [2020-10-27 20:29:28,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:28,231 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-10-27 20:29:28,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:29:28,232 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 20:29:28,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:28,233 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:29:28,233 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:29:28,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:29:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:29:28,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 20:29:28,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:29:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2020-10-27 20:29:28,245 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 35 [2020-10-27 20:29:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:28,246 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2020-10-27 20:29:28,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:29:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2020-10-27 20:29:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:29:28,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:28,248 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:28,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:29:28,248 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:28,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1954753251, now seen corresponding path program 11 times [2020-10-27 20:29:28,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:28,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120314342] [2020-10-27 20:29:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:28,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:28,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:28,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:28,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:28,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:29:28,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:28,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-27 20:29:28,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:28,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:29:28,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:28,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:29:28,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:28,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:28,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:28,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:28,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:28,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:28,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:28,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:28,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:28,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:28,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:28,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:28,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120314342] [2020-10-27 20:29:28,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:28,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:29:28,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040236028] [2020-10-27 20:29:28,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:29:28,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:28,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:29:28,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:29:28,964 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 15 states. [2020-10-27 20:29:29,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:29,574 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2020-10-27 20:29:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:29:29,575 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 20:29:29,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:29,576 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:29:29,576 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:29:29,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:29:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:29:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 20:29:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:29:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-10-27 20:29:29,588 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 37 [2020-10-27 20:29:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:29,588 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-10-27 20:29:29,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:29:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-10-27 20:29:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:29:29,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:29,589 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:29,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:29:29,589 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:29,590 INFO L82 PathProgramCache]: Analyzing trace with hash -225964962, now seen corresponding path program 12 times [2020-10-27 20:29:29,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:29,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632792669] [2020-10-27 20:29:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:29,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:29,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:29,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:30,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:30,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:29:30,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:30,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-27 20:29:30,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:30,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:29:30,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:30,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:29:30,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:30,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:30,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:30,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:30,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:30,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:30,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:30,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:30,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:30,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:30,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:30,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 25 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:30,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632792669] [2020-10-27 20:29:30,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:30,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:29:30,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831776142] [2020-10-27 20:29:30,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:29:30,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:30,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:29:30,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:29:30,501 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 16 states. [2020-10-27 20:29:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:31,208 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-10-27 20:29:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:29:31,208 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 20:29:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:31,210 INFO L225 Difference]: With dead ends: 50 [2020-10-27 20:29:31,210 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:29:31,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:29:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:29:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 20:29:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:29:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 56 transitions. [2020-10-27 20:29:31,218 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 56 transitions. Word has length 39 [2020-10-27 20:29:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:31,219 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 56 transitions. [2020-10-27 20:29:31,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:29:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 56 transitions. [2020-10-27 20:29:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:29:31,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:31,220 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:31,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:29:31,220 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:31,221 INFO L82 PathProgramCache]: Analyzing trace with hash 47872793, now seen corresponding path program 13 times [2020-10-27 20:29:31,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:31,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814119493] [2020-10-27 20:29:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:31,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:31,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:31,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:31,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:31,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:29:31,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:31,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 615 [2020-10-27 20:29:31,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:29:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:29:31,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:32,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:32,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:32,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:32,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:32,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:32,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:32,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:32,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 27 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:32,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814119493] [2020-10-27 20:29:32,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:32,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:29:32,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960325887] [2020-10-27 20:29:32,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:29:32,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:32,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:29:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:29:32,088 INFO L87 Difference]: Start difference. First operand 42 states and 56 transitions. Second operand 17 states. [2020-10-27 20:29:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:32,894 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-27 20:29:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:29:32,895 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-27 20:29:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:32,896 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:29:32,896 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:29:32,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:29:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:29:32,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-27 20:29:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:29:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2020-10-27 20:29:32,904 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 41 [2020-10-27 20:29:32,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:32,904 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2020-10-27 20:29:32,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:29:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2020-10-27 20:29:32,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:29:32,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:32,905 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:32,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:29:32,906 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:32,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:32,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1212950292, now seen corresponding path program 14 times [2020-10-27 20:29:32,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:32,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485996574] [2020-10-27 20:29:32,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:32,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:32,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:33,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:33,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:33,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:29:33,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:33,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-27 20:29:33,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:29:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:29:33,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:33,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:33,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:33,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:33,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:33,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:33,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 29 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:33,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485996574] [2020-10-27 20:29:33,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:33,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:29:33,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236134918] [2020-10-27 20:29:33,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:29:33,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:29:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:29:33,698 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand 18 states. [2020-10-27 20:29:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:34,642 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-10-27 20:29:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:29:34,643 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-27 20:29:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:34,644 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:29:34,644 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:29:34,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:29:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:29:34,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 20:29:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:29:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-10-27 20:29:34,661 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 43 [2020-10-27 20:29:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:34,661 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-10-27 20:29:34,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:29:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-10-27 20:29:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:29:34,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:34,662 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:34,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:29:34,663 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:34,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:34,665 INFO L82 PathProgramCache]: Analyzing trace with hash -134037425, now seen corresponding path program 15 times [2020-10-27 20:29:34,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:34,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801407542] [2020-10-27 20:29:34,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:34,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:34,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:34,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:35,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:35,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:29:35,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:35,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-27 20:29:35,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:29:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:35,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:29:35,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:29:35,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:35,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:35,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:35,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:35,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:35,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:35,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:35,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 31 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:35,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801407542] [2020-10-27 20:29:35,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:35,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:29:35,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632720835] [2020-10-27 20:29:35,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:29:35,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:29:35,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:29:35,713 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 19 states. [2020-10-27 20:29:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:36,643 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2020-10-27 20:29:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:29:36,643 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-27 20:29:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:36,644 INFO L225 Difference]: With dead ends: 56 [2020-10-27 20:29:36,645 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:29:36,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:29:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:29:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 20:29:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:29:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-10-27 20:29:36,653 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 45 [2020-10-27 20:29:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:36,654 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-10-27 20:29:36,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:29:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-10-27 20:29:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:29:36,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:36,655 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:36,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:29:36,655 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:36,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:36,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1804077366, now seen corresponding path program 16 times [2020-10-27 20:29:36,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:36,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219810033] [2020-10-27 20:29:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:36,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:36,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:36,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:37,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:37,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:29:37,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:37,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 805 [2020-10-27 20:29:37,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:37,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:29:37,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:37,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:29:37,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:37,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:37,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:37,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:37,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:37,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:37,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:37,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:37,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:37,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:37,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:37,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 33 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:37,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219810033] [2020-10-27 20:29:37,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:37,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:29:37,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671965050] [2020-10-27 20:29:37,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:29:37,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:37,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:29:37,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:29:37,772 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 20 states. [2020-10-27 20:29:38,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:38,688 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-10-27 20:29:38,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:29:38,689 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-27 20:29:38,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:38,690 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:29:38,690 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:29:38,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:29:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:29:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-27 20:29:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 20:29:38,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2020-10-27 20:29:38,707 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 47 [2020-10-27 20:29:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:38,707 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2020-10-27 20:29:38,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:29:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2020-10-27 20:29:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 20:29:38,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:38,708 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:38,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:29:38,709 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash -394691963, now seen corresponding path program 17 times [2020-10-27 20:29:38,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:38,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590036205] [2020-10-27 20:29:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:38,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:38,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:38,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:39,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:39,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:29:39,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:39,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-27 20:29:39,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:39,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:29:39,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:39,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:29:39,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:39,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:39,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:39,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:39,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:39,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:39,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:39,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:39,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:39,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:39,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:39,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 35 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:39,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590036205] [2020-10-27 20:29:39,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:39,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:29:39,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122251961] [2020-10-27 20:29:39,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:29:39,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:39,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:29:39,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:29:39,826 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand 21 states. [2020-10-27 20:29:40,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:40,901 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2020-10-27 20:29:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:29:40,901 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-27 20:29:40,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:40,902 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:29:40,902 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 20:29:40,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:29:40,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 20:29:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 20:29:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:29:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-10-27 20:29:40,921 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 49 [2020-10-27 20:29:40,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:40,921 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-10-27 20:29:40,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:29:40,921 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-10-27 20:29:40,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:29:40,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:40,922 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:40,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:29:40,923 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:40,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:40,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1109982080, now seen corresponding path program 18 times [2020-10-27 20:29:40,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:40,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894235131] [2020-10-27 20:29:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:40,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:40,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:41,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:41,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:41,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:29:41,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:41,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 821 [2020-10-27 20:29:41,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:41,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:29:41,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:41,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:29:41,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:42,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:42,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:42,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:42,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:42,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:42,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:42,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:42,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:42,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:42,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:42,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 37 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:42,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894235131] [2020-10-27 20:29:42,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:42,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:29:42,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224233818] [2020-10-27 20:29:42,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:29:42,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:42,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:29:42,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:29:42,117 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 22 states. [2020-10-27 20:29:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:43,241 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-10-27 20:29:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:29:43,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-27 20:29:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:43,243 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:29:43,243 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:29:43,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:29:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:29:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 20:29:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 20:29:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-10-27 20:29:43,251 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 51 [2020-10-27 20:29:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:43,252 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-10-27 20:29:43,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:29:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-10-27 20:29:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:29:43,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:43,252 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:43,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:29:43,253 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:43,253 INFO L82 PathProgramCache]: Analyzing trace with hash -302241349, now seen corresponding path program 19 times [2020-10-27 20:29:43,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:43,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485143084] [2020-10-27 20:29:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:43,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:43,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:43,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:44,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:44,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 20:29:44,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:44,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-27 20:29:44,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:29:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:29:44,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:44,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:44,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:44,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:44,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:44,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:44,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:29:44,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:44,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:44,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:44,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:44,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:29:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 39 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:44,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485143084] [2020-10-27 20:29:44,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:44,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:29:44,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067364316] [2020-10-27 20:29:44,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:29:44,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:44,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:29:44,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:29:44,540 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 23 states. [2020-10-27 20:29:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:45,741 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-10-27 20:29:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:29:45,742 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-27 20:29:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:45,743 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:29:45,743 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:29:45,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:29:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:29:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-27 20:29:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:29:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 77 transitions. [2020-10-27 20:29:45,759 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 77 transitions. Word has length 53 [2020-10-27 20:29:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:45,759 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 77 transitions. [2020-10-27 20:29:45,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:29:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 77 transitions. [2020-10-27 20:29:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:29:45,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:45,760 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:45,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:29:45,760 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:45,761 INFO L82 PathProgramCache]: Analyzing trace with hash -239291082, now seen corresponding path program 20 times [2020-10-27 20:29:45,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:45,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682886039] [2020-10-27 20:29:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:45,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:45,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:46,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:46,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:46,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 20:29:46,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:46,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-27 20:29:46,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:46,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:29:46,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:46,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:29:46,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:47,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:47,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:47,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:47,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:47,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:47,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:29:47,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:47,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:47,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:47,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:47,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 41 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:47,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682886039] [2020-10-27 20:29:47,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:47,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:29:47,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57418060] [2020-10-27 20:29:47,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:29:47,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:47,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:29:47,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:29:47,049 INFO L87 Difference]: Start difference. First operand 56 states and 77 transitions. Second operand 24 states. [2020-10-27 20:29:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:48,308 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2020-10-27 20:29:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:29:48,309 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-27 20:29:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:48,310 INFO L225 Difference]: With dead ends: 66 [2020-10-27 20:29:48,310 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 20:29:48,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:29:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 20:29:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 20:29:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 20:29:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2020-10-27 20:29:48,319 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 55 [2020-10-27 20:29:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:48,319 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2020-10-27 20:29:48,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:29:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2020-10-27 20:29:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 20:29:48,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:48,320 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:48,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:29:48,320 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:48,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:48,321 INFO L82 PathProgramCache]: Analyzing trace with hash 126373361, now seen corresponding path program 21 times [2020-10-27 20:29:48,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:48,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771567282] [2020-10-27 20:29:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:48,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:48,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:48,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:49,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:49,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:29:49,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:49,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-27 20:29:49,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:29:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:29:49,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:49,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:49,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:49,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:49,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:49,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:49,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:49,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:49,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:49,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:49,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:49,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 43 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:49,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771567282] [2020-10-27 20:29:49,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:49,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:29:49,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661493205] [2020-10-27 20:29:49,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:29:49,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:49,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:29:49,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:29:49,545 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand 25 states. [2020-10-27 20:29:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:50,851 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-10-27 20:29:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:29:50,852 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-27 20:29:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:50,853 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:29:50,853 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 20:29:50,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:29:50,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 20:29:50,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-27 20:29:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:29:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2020-10-27 20:29:50,861 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 57 [2020-10-27 20:29:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:50,861 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2020-10-27 20:29:50,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:29:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2020-10-27 20:29:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:29:50,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:50,862 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:50,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:29:50,862 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:50,863 INFO L82 PathProgramCache]: Analyzing trace with hash -657415188, now seen corresponding path program 22 times [2020-10-27 20:29:50,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:50,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470127846] [2020-10-27 20:29:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:50,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:50,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:51,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:51,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:51,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:29:51,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:51,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-27 20:29:51,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:51,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:29:51,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:51,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 20:29:51,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:52,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:52,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:52,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:52,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:52,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:52,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:52,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 45 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:52,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470127846] [2020-10-27 20:29:52,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:52,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:29:52,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212559224] [2020-10-27 20:29:52,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:29:52,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:29:52,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:29:52,117 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand 26 states. [2020-10-27 20:29:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:53,585 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2020-10-27 20:29:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:29:53,585 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-27 20:29:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:53,586 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:29:53,586 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 20:29:53,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:29:53,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 20:29:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-27 20:29:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 20:29:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-10-27 20:29:53,594 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 59 [2020-10-27 20:29:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:53,594 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-10-27 20:29:53,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:29:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-10-27 20:29:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 20:29:53,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:53,595 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:53,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:29:53,595 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:53,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:53,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2036033319, now seen corresponding path program 23 times [2020-10-27 20:29:53,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:53,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809996532] [2020-10-27 20:29:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:53,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:53,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:53,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:54,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:54,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 20:29:54,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:54,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-27 20:29:54,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:29:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:29:54,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:54,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:54,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:54,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:54,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:54,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:54,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:54,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:54,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:54,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:54,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:54,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 47 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:54,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809996532] [2020-10-27 20:29:54,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:54,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:29:54,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755179119] [2020-10-27 20:29:54,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:29:54,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:54,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:29:54,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:29:54,778 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 27 states. [2020-10-27 20:29:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:56,290 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2020-10-27 20:29:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:29:56,290 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-27 20:29:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:56,291 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:29:56,291 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 20:29:56,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:29:56,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 20:29:56,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-27 20:29:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:29:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2020-10-27 20:29:56,299 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 61 [2020-10-27 20:29:56,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:56,299 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2020-10-27 20:29:56,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:29:56,299 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2020-10-27 20:29:56,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 20:29:56,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:56,300 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:56,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:29:56,300 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:56,301 INFO L82 PathProgramCache]: Analyzing trace with hash 574769058, now seen corresponding path program 24 times [2020-10-27 20:29:56,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:56,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220096333] [2020-10-27 20:29:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:56,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:56,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:56,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:57,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:57,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:29:57,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:57,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 893 [2020-10-27 20:29:57,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:29:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:29:57,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:57,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:57,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:57,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:57,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:57,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:57,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:57,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:57,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:57,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:57,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:57,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 49 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:57,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220096333] [2020-10-27 20:29:57,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:57,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:29:57,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841061596] [2020-10-27 20:29:57,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:29:57,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:57,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:29:57,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:29:57,752 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand 28 states. [2020-10-27 20:29:59,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:59,301 INFO L93 Difference]: Finished difference Result 74 states and 102 transitions. [2020-10-27 20:29:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:29:59,302 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-27 20:29:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:59,303 INFO L225 Difference]: With dead ends: 74 [2020-10-27 20:29:59,303 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:29:59,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:29:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:29:59,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-27 20:29:59,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 20:29:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 92 transitions. [2020-10-27 20:29:59,310 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 92 transitions. Word has length 63 [2020-10-27 20:29:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:59,311 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 92 transitions. [2020-10-27 20:29:59,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:29:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 92 transitions. [2020-10-27 20:29:59,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 20:29:59,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:59,312 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:59,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:29:59,312 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:59,312 INFO L82 PathProgramCache]: Analyzing trace with hash 754120029, now seen corresponding path program 25 times [2020-10-27 20:29:59,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:59,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891769190] [2020-10-27 20:29:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:59,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:59,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:59,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:00,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:00,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 20:30:00,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:00,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-27 20:30:00,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:00,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:30:00,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:00,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:30:00,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:00,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:00,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:00,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:00,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:00,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:00,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:00,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:00,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:00,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:00,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:00,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 51 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:00,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891769190] [2020-10-27 20:30:00,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:00,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:30:00,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759378902] [2020-10-27 20:30:00,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:30:00,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:00,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:30:00,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:30:00,790 INFO L87 Difference]: Start difference. First operand 66 states and 92 transitions. Second operand 29 states. [2020-10-27 20:30:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:02,546 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2020-10-27 20:30:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:30:02,547 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-10-27 20:30:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:02,548 INFO L225 Difference]: With dead ends: 76 [2020-10-27 20:30:02,548 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 20:30:02,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:30:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 20:30:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-27 20:30:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 20:30:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2020-10-27 20:30:02,556 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 65 [2020-10-27 20:30:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:02,556 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2020-10-27 20:30:02,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:30:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2020-10-27 20:30:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 20:30:02,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:02,557 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:02,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:30:02,557 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:02,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1311711320, now seen corresponding path program 26 times [2020-10-27 20:30:02,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:02,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680438515] [2020-10-27 20:30:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:02,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:02,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:02,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:03,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:03,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 20:30:03,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:03,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 958 [2020-10-27 20:30:03,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:03,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:30:03,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:03,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:30:03,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:04,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:04,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:04,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:04,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:04,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:04,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:04,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:04,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:04,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:04,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:04,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 53 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:04,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680438515] [2020-10-27 20:30:04,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:04,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:30:04,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169952505] [2020-10-27 20:30:04,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:30:04,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:04,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:30:04,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:30:04,133 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand 30 states. [2020-10-27 20:30:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:05,976 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-10-27 20:30:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:30:05,976 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-27 20:30:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:05,977 INFO L225 Difference]: With dead ends: 78 [2020-10-27 20:30:05,977 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:30:05,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:30:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:30:05,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-27 20:30:05,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 20:30:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2020-10-27 20:30:05,986 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 67 [2020-10-27 20:30:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:05,986 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2020-10-27 20:30:05,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:30:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2020-10-27 20:30:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 20:30:05,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:05,987 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:05,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:30:05,987 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:05,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:05,988 INFO L82 PathProgramCache]: Analyzing trace with hash 286029971, now seen corresponding path program 27 times [2020-10-27 20:30:05,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:05,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629927824] [2020-10-27 20:30:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:05,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:06,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:06,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:06,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:06,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 20:30:06,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:06,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 944 [2020-10-27 20:30:06,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:30:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:30:06,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:07,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:07,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:07,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:07,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:07,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:07,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:07,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:07,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:07,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:07,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:07,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 55 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:07,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629927824] [2020-10-27 20:30:07,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:07,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:30:07,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687072965] [2020-10-27 20:30:07,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:30:07,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:07,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:30:07,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:30:07,568 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 31 states. [2020-10-27 20:30:09,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:09,340 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-10-27 20:30:09,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:30:09,341 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-10-27 20:30:09,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:09,342 INFO L225 Difference]: With dead ends: 80 [2020-10-27 20:30:09,342 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 20:30:09,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:30:09,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 20:30:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-27 20:30:09,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:30:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-10-27 20:30:09,350 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 69 [2020-10-27 20:30:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:09,350 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-10-27 20:30:09,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:30:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-10-27 20:30:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 20:30:09,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:09,351 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:09,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:30:09,351 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:09,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1846235634, now seen corresponding path program 28 times [2020-10-27 20:30:09,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:09,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032444305] [2020-10-27 20:30:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:09,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:09,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:09,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:10,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:10,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 20:30:10,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:10,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 921 [2020-10-27 20:30:10,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:30:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:30:10,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:10,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:10,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:10,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:10,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:10,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:30:10,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 57 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:10,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032444305] [2020-10-27 20:30:10,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:10,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:30:10,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036899753] [2020-10-27 20:30:10,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:30:10,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:10,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:30:10,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:30:10,982 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 32 states. [2020-10-27 20:30:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:13,005 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2020-10-27 20:30:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:30:13,006 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-27 20:30:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:13,007 INFO L225 Difference]: With dead ends: 82 [2020-10-27 20:30:13,008 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 20:30:13,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:30:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 20:30:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-27 20:30:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 20:30:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-10-27 20:30:13,014 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 71 [2020-10-27 20:30:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:13,015 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-10-27 20:30:13,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:30:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-10-27 20:30:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 20:30:13,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:13,015 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:13,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:30:13,016 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:13,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2040885449, now seen corresponding path program 29 times [2020-10-27 20:30:13,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:13,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475202001] [2020-10-27 20:30:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:13,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:13,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:13,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:14,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:14,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 20:30:14,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:14,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1203 [2020-10-27 20:30:14,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:14,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:30:14,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:14,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:30:14,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:14,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:14,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:14,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:14,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:14,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:14,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:14,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:14,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:14,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:14,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:14,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 59 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:14,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475202001] [2020-10-27 20:30:14,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:14,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:30:14,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807278442] [2020-10-27 20:30:14,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:30:14,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:14,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:30:14,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:30:14,945 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 33 states. [2020-10-27 20:30:17,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:17,005 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2020-10-27 20:30:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:30:17,006 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-10-27 20:30:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:17,006 INFO L225 Difference]: With dead ends: 84 [2020-10-27 20:30:17,007 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:30:17,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:30:17,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:30:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-27 20:30:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 20:30:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-10-27 20:30:17,019 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 73 [2020-10-27 20:30:17,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:17,020 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-10-27 20:30:17,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:30:17,020 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-10-27 20:30:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 20:30:17,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:17,021 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:17,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:30:17,021 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:17,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash 942698692, now seen corresponding path program 30 times [2020-10-27 20:30:17,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:17,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452469764] [2020-10-27 20:30:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:17,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:17,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:17,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:18,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:18,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 20:30:18,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:18,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-10-27 20:30:18,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:18,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:30:18,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:18,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:30:18,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:18,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:18,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:18,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:18,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:18,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:18,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:18,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:18,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 61 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:18,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452469764] [2020-10-27 20:30:18,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:18,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:30:18,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139804165] [2020-10-27 20:30:18,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:30:18,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:18,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:30:18,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:30:18,804 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 34 states. [2020-10-27 20:30:20,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:20,966 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2020-10-27 20:30:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:30:20,967 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-27 20:30:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:20,968 INFO L225 Difference]: With dead ends: 86 [2020-10-27 20:30:20,968 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:30:20,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:30:20,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:30:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-27 20:30:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 20:30:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 110 transitions. [2020-10-27 20:30:20,976 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 110 transitions. Word has length 75 [2020-10-27 20:30:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:20,976 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 110 transitions. [2020-10-27 20:30:20,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:30:20,976 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 110 transitions. [2020-10-27 20:30:20,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 20:30:20,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:20,977 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:20,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:30:20,978 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:20,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:20,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2147180031, now seen corresponding path program 31 times [2020-10-27 20:30:20,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:20,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839665085] [2020-10-27 20:30:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:20,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:21,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:21,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:22,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:22,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 20:30:22,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:22,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1305 [2020-10-27 20:30:22,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:30:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 20:30:22,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:23,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:23,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:23,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:23,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:23,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:23,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:23,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:23,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:23,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:23,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:23,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 63 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:23,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839665085] [2020-10-27 20:30:23,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:23,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:30:23,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863753621] [2020-10-27 20:30:23,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:30:23,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:23,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:30:23,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:30:23,103 INFO L87 Difference]: Start difference. First operand 78 states and 110 transitions. Second operand 35 states. [2020-10-27 20:30:25,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:25,398 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2020-10-27 20:30:25,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:30:25,399 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2020-10-27 20:30:25,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:25,400 INFO L225 Difference]: With dead ends: 88 [2020-10-27 20:30:25,400 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 20:30:25,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:30:25,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 20:30:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-27 20:30:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 20:30:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 113 transitions. [2020-10-27 20:30:25,408 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 113 transitions. Word has length 77 [2020-10-27 20:30:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:25,409 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 113 transitions. [2020-10-27 20:30:25,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:30:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 113 transitions. [2020-10-27 20:30:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 20:30:25,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:25,409 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:25,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:30:25,409 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:25,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:25,410 INFO L82 PathProgramCache]: Analyzing trace with hash 12576890, now seen corresponding path program 32 times [2020-10-27 20:30:25,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:25,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549720053] [2020-10-27 20:30:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:25,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:25,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:25,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:26,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:26,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 20:30:26,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:26,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1263 [2020-10-27 20:30:26,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:26,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:30:26,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:26,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 20:30:26,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:27,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:27,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:27,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:27,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:27,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:27,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 65 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:27,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549720053] [2020-10-27 20:30:27,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:27,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:30:27,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900119653] [2020-10-27 20:30:27,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:30:27,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:27,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:30:27,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:30:27,515 INFO L87 Difference]: Start difference. First operand 80 states and 113 transitions. Second operand 36 states. [2020-10-27 20:30:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:29,803 INFO L93 Difference]: Finished difference Result 90 states and 126 transitions. [2020-10-27 20:30:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:30:29,804 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-10-27 20:30:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:29,805 INFO L225 Difference]: With dead ends: 90 [2020-10-27 20:30:29,805 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 20:30:29,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:30:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 20:30:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-27 20:30:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:30:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 116 transitions. [2020-10-27 20:30:29,820 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 116 transitions. Word has length 79 [2020-10-27 20:30:29,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:29,820 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 116 transitions. [2020-10-27 20:30:29,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:30:29,820 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 116 transitions. [2020-10-27 20:30:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 20:30:29,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:29,821 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:29,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:30:29,821 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1653325877, now seen corresponding path program 33 times [2020-10-27 20:30:29,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:29,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277578948] [2020-10-27 20:30:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:29,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:29,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:30,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:31,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:31,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 20:30:31,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:31,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1383 [2020-10-27 20:30:31,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:31,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:30:31,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:31,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:30:31,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:32,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:32,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:32,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:32,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:32,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:32,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:32,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:32,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:32,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:32,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:32,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 67 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:32,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277578948] [2020-10-27 20:30:32,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:32,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:30:32,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303390354] [2020-10-27 20:30:32,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:30:32,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:32,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:30:32,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:30:32,115 INFO L87 Difference]: Start difference. First operand 82 states and 116 transitions. Second operand 37 states. [2020-10-27 20:30:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:34,589 INFO L93 Difference]: Finished difference Result 92 states and 129 transitions. [2020-10-27 20:30:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:30:34,589 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2020-10-27 20:30:34,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:34,591 INFO L225 Difference]: With dead ends: 92 [2020-10-27 20:30:34,591 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:30:34,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:30:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:30:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-27 20:30:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 20:30:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2020-10-27 20:30:34,599 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 81 [2020-10-27 20:30:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:34,599 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2020-10-27 20:30:34,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:30:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2020-10-27 20:30:34,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 20:30:34,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:34,600 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:34,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:30:34,600 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:34,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2134862544, now seen corresponding path program 34 times [2020-10-27 20:30:34,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:34,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031591795] [2020-10-27 20:30:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:34,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:34,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:35,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:35,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:35,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 20:30:35,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:35,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1266 [2020-10-27 20:30:35,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:35,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:30:35,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:35,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 20:30:35,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:36,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:36,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:36,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:36,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:36,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:36,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:36,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:36,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:36,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:36,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:36,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 69 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:36,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031591795] [2020-10-27 20:30:36,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:36,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:30:36,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611304386] [2020-10-27 20:30:36,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:30:36,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:36,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:30:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:30:36,835 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand 38 states. [2020-10-27 20:30:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:39,469 INFO L93 Difference]: Finished difference Result 94 states and 132 transitions. [2020-10-27 20:30:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:30:39,470 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2020-10-27 20:30:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:39,471 INFO L225 Difference]: With dead ends: 94 [2020-10-27 20:30:39,471 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 20:30:39,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 20:30:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 20:30:39,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-27 20:30:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 20:30:39,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 122 transitions. [2020-10-27 20:30:39,481 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 122 transitions. Word has length 83 [2020-10-27 20:30:39,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:39,481 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 122 transitions. [2020-10-27 20:30:39,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:30:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 122 transitions. [2020-10-27 20:30:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 20:30:39,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:39,482 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:39,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:30:39,482 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:39,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:39,483 INFO L82 PathProgramCache]: Analyzing trace with hash -451668117, now seen corresponding path program 35 times [2020-10-27 20:30:39,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:39,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726148374] [2020-10-27 20:30:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:39,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:39,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:39,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:41,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:41,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 20:30:41,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:41,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1681 [2020-10-27 20:30:41,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:30:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 20:30:41,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:42,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:42,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:42,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:42,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:42,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:42,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:30:42,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:42,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:42,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:42,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:42,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 71 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:42,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726148374] [2020-10-27 20:30:42,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:42,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:30:42,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850355526] [2020-10-27 20:30:42,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:30:42,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:30:42,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:30:42,208 INFO L87 Difference]: Start difference. First operand 86 states and 122 transitions. Second operand 39 states. [2020-10-27 20:30:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:44,918 INFO L93 Difference]: Finished difference Result 96 states and 135 transitions. [2020-10-27 20:30:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:30:44,919 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2020-10-27 20:30:44,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:44,920 INFO L225 Difference]: With dead ends: 96 [2020-10-27 20:30:44,920 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 20:30:44,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 20:30:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 20:30:44,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-27 20:30:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 20:30:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 125 transitions. [2020-10-27 20:30:44,928 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 125 transitions. Word has length 85 [2020-10-27 20:30:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:44,929 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 125 transitions. [2020-10-27 20:30:44,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:30:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 125 transitions. [2020-10-27 20:30:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 20:30:44,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:44,930 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:44,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:30:44,930 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:44,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:44,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2104494362, now seen corresponding path program 36 times [2020-10-27 20:30:44,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:44,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539660791] [2020-10-27 20:30:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:44,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:44,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:45,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:46,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:46,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 20:30:46,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:46,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1607 [2020-10-27 20:30:46,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 20:30:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 20:30:46,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:47,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:47,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:47,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:47,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:47,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:47,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:30:47,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:47,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:47,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:47,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:47,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 73 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:47,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539660791] [2020-10-27 20:30:47,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:47,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 20:30:47,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122229205] [2020-10-27 20:30:47,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 20:30:47,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:47,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 20:30:47,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:30:47,568 INFO L87 Difference]: Start difference. First operand 88 states and 125 transitions. Second operand 40 states. [2020-10-27 20:30:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:50,300 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2020-10-27 20:30:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:30:50,301 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 87 [2020-10-27 20:30:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:50,302 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:30:50,302 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:30:50,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 20:30:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:30:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-27 20:30:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 20:30:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2020-10-27 20:30:50,310 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 87 [2020-10-27 20:30:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:50,310 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2020-10-27 20:30:50,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 20:30:50,310 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2020-10-27 20:30:50,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 20:30:50,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:50,311 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:50,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:30:50,312 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1332616287, now seen corresponding path program 37 times [2020-10-27 20:30:50,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:50,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46925068] [2020-10-27 20:30:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:50,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:50,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:50,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:52,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:52,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 20:30:52,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:52,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1853 [2020-10-27 20:30:52,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:52,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:30:52,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:52,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 20:30:52,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:53,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:53,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:53,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:53,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:53,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:53,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:30:53,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:53,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:53,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:53,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:53,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 75 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:53,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46925068] [2020-10-27 20:30:53,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:53,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:30:53,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951233164] [2020-10-27 20:30:53,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:30:53,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:53,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:30:53,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:30:53,293 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand 41 states. [2020-10-27 20:30:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:56,290 INFO L93 Difference]: Finished difference Result 100 states and 141 transitions. [2020-10-27 20:30:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:30:56,290 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2020-10-27 20:30:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:56,291 INFO L225 Difference]: With dead ends: 100 [2020-10-27 20:30:56,292 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 20:30:56,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 20:30:56,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 20:30:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-27 20:30:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 20:30:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 131 transitions. [2020-10-27 20:30:56,300 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 131 transitions. Word has length 89 [2020-10-27 20:30:56,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:56,300 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 131 transitions. [2020-10-27 20:30:56,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:30:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 131 transitions. [2020-10-27 20:30:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 20:30:56,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:56,302 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:56,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:30:56,302 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1707838876, now seen corresponding path program 38 times [2020-10-27 20:30:56,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:56,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045184490] [2020-10-27 20:30:56,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:56,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:56,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:56,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:57,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:57,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 20:30:57,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:57,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1508 [2020-10-27 20:30:57,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:57,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:30:57,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:57,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 20:30:57,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:58,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:58,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:58,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:58,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:58,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:58,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:58,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:58,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 77 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:58,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045184490] [2020-10-27 20:30:58,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:58,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 20:30:58,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057438595] [2020-10-27 20:30:58,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 20:30:58,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:58,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 20:30:58,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:30:58,988 INFO L87 Difference]: Start difference. First operand 92 states and 131 transitions. Second operand 42 states. [2020-10-27 20:31:02,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:02,134 INFO L93 Difference]: Finished difference Result 102 states and 144 transitions. [2020-10-27 20:31:02,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:31:02,135 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 91 [2020-10-27 20:31:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:02,136 INFO L225 Difference]: With dead ends: 102 [2020-10-27 20:31:02,136 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:31:02,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 20:31:02,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:31:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-27 20:31:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 20:31:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 134 transitions. [2020-10-27 20:31:02,148 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 134 transitions. Word has length 91 [2020-10-27 20:31:02,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:02,148 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 134 transitions. [2020-10-27 20:31:02,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 20:31:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 134 transitions. [2020-10-27 20:31:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 20:31:02,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:02,150 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:02,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:31:02,150 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:02,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:02,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1287478057, now seen corresponding path program 39 times [2020-10-27 20:31:02,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:02,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118639187] [2020-10-27 20:31:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:02,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:02,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:03,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:03,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:03,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 20:31:03,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:03,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1763 [2020-10-27 20:31:03,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:03,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:31:03,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:03,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 20:31:03,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:05,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:05,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:05,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:05,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:05,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:05,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:31:05,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:05,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:05,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:05,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:05,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 79 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:05,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118639187] [2020-10-27 20:31:05,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:05,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:31:05,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511098149] [2020-10-27 20:31:05,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:31:05,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:05,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:31:05,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:31:05,162 INFO L87 Difference]: Start difference. First operand 94 states and 134 transitions. Second operand 43 states. [2020-10-27 20:31:08,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:08,278 INFO L93 Difference]: Finished difference Result 104 states and 147 transitions. [2020-10-27 20:31:08,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 20:31:08,278 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2020-10-27 20:31:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:08,280 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:31:08,280 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 20:31:08,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 20:31:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 20:31:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-27 20:31:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 20:31:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 137 transitions. [2020-10-27 20:31:08,288 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 137 transitions. Word has length 93 [2020-10-27 20:31:08,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:08,289 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 137 transitions. [2020-10-27 20:31:08,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:31:08,289 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 137 transitions. [2020-10-27 20:31:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 20:31:08,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:08,290 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:08,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:31:08,290 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:08,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:08,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2136004946, now seen corresponding path program 40 times [2020-10-27 20:31:08,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:08,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992463718] [2020-10-27 20:31:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:08,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:08,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:09,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:09,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:09,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 20:31:09,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:09,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1643 [2020-10-27 20:31:09,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:09,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 20:31:09,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:09,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 20:31:09,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:11,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:11,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:11,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:11,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:11,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:11,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:31:11,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:11,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:11,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:11,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 81 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:11,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992463718] [2020-10-27 20:31:11,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:11,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 20:31:11,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331557240] [2020-10-27 20:31:11,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 20:31:11,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:11,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 20:31:11,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:31:11,273 INFO L87 Difference]: Start difference. First operand 96 states and 137 transitions. Second operand 44 states. [2020-10-27 20:31:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:14,609 INFO L93 Difference]: Finished difference Result 106 states and 150 transitions. [2020-10-27 20:31:14,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 20:31:14,610 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 95 [2020-10-27 20:31:14,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:14,611 INFO L225 Difference]: With dead ends: 106 [2020-10-27 20:31:14,612 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:31:14,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 20:31:14,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:31:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-27 20:31:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 20:31:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 140 transitions. [2020-10-27 20:31:14,621 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 140 transitions. Word has length 95 [2020-10-27 20:31:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:14,621 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 140 transitions. [2020-10-27 20:31:14,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 20:31:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 140 transitions. [2020-10-27 20:31:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 20:31:14,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:14,622 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:14,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:31:14,623 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:14,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:14,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2136745203, now seen corresponding path program 41 times [2020-10-27 20:31:14,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:14,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626453679] [2020-10-27 20:31:14,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:14,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:14,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:15,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:16,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:16,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 20:31:16,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:16,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1760 [2020-10-27 20:31:16,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:16,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 20:31:16,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:16,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 20:31:16,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:17,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:17,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:17,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:17,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:17,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:17,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:17,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:17,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:17,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:17,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:17,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 83 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:17,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626453679] [2020-10-27 20:31:17,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:17,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 20:31:17,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137864307] [2020-10-27 20:31:17,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 20:31:17,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 20:31:17,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:31:17,764 INFO L87 Difference]: Start difference. First operand 98 states and 140 transitions. Second operand 45 states. [2020-10-27 20:31:21,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:21,043 INFO L93 Difference]: Finished difference Result 108 states and 153 transitions. [2020-10-27 20:31:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:31:21,051 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 97 [2020-10-27 20:31:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:21,052 INFO L225 Difference]: With dead ends: 108 [2020-10-27 20:31:21,052 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 20:31:21,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 20:31:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 20:31:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-27 20:31:21,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 20:31:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 143 transitions. [2020-10-27 20:31:21,060 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 143 transitions. Word has length 97 [2020-10-27 20:31:21,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:21,060 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 143 transitions. [2020-10-27 20:31:21,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 20:31:21,060 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 143 transitions. [2020-10-27 20:31:21,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 20:31:21,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:21,061 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:21,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:31:21,061 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:21,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2034063880, now seen corresponding path program 42 times [2020-10-27 20:31:21,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:21,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932171910] [2020-10-27 20:31:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:21,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:21,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:21,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:22,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:22,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 20:31:22,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:22,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1850 [2020-10-27 20:31:22,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 20:31:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 20:31:22,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:24,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:24,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:24,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:24,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:24,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:24,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:24,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:24,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:24,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:24,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:24,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 85 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:24,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932171910] [2020-10-27 20:31:24,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:24,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 20:31:24,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633904462] [2020-10-27 20:31:24,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 20:31:24,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:24,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 20:31:24,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:31:24,341 INFO L87 Difference]: Start difference. First operand 100 states and 143 transitions. Second operand 46 states. [2020-10-27 20:31:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:27,926 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2020-10-27 20:31:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 20:31:27,927 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 99 [2020-10-27 20:31:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:27,928 INFO L225 Difference]: With dead ends: 110 [2020-10-27 20:31:27,928 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 20:31:27,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 20:31:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 20:31:27,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-27 20:31:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 20:31:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 146 transitions. [2020-10-27 20:31:27,937 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 146 transitions. Word has length 99 [2020-10-27 20:31:27,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:27,937 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 146 transitions. [2020-10-27 20:31:27,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 20:31:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 146 transitions. [2020-10-27 20:31:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 20:31:27,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:27,939 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:27,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:31:27,939 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:27,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1317861821, now seen corresponding path program 43 times [2020-10-27 20:31:27,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:27,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019205029] [2020-10-27 20:31:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:27,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:28,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:28,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:29,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:29,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 20:31:29,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:29,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1628 [2020-10-27 20:31:29,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:29,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 20:31:29,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:29,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 20:31:29,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:31,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:31,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:31,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:31,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:31,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:31,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:31:31,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:31,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 87 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:31,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019205029] [2020-10-27 20:31:31,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:31,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 20:31:31,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995661696] [2020-10-27 20:31:31,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 20:31:31,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:31,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 20:31:31,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:31:31,099 INFO L87 Difference]: Start difference. First operand 102 states and 146 transitions. Second operand 47 states. [2020-10-27 20:31:34,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:34,838 INFO L93 Difference]: Finished difference Result 112 states and 159 transitions. [2020-10-27 20:31:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 20:31:34,838 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 101 [2020-10-27 20:31:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:34,840 INFO L225 Difference]: With dead ends: 112 [2020-10-27 20:31:34,840 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 20:31:34,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 20:31:34,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 20:31:34,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-27 20:31:34,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 20:31:34,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 149 transitions. [2020-10-27 20:31:34,849 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 149 transitions. Word has length 101 [2020-10-27 20:31:34,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:34,850 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 149 transitions. [2020-10-27 20:31:34,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 20:31:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 149 transitions. [2020-10-27 20:31:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 20:31:34,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:34,852 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:34,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 20:31:34,852 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:34,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:34,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1292988482, now seen corresponding path program 44 times [2020-10-27 20:31:34,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:34,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658146176] [2020-10-27 20:31:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:34,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:34,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:35,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:36,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:36,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 20:31:36,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:36,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1706 [2020-10-27 20:31:36,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:36,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 20:31:36,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:36,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 20:31:36,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:38,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:38,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:38,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:38,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:38,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:38,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:38,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:38,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:38,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:38,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:38,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 89 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:38,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658146176] [2020-10-27 20:31:38,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:38,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 20:31:38,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636547508] [2020-10-27 20:31:38,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 20:31:38,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:38,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 20:31:38,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:31:38,131 INFO L87 Difference]: Start difference. First operand 104 states and 149 transitions. Second operand 48 states. [2020-10-27 20:31:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:41,910 INFO L93 Difference]: Finished difference Result 114 states and 162 transitions. [2020-10-27 20:31:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 20:31:41,911 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 103 [2020-10-27 20:31:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:41,912 INFO L225 Difference]: With dead ends: 114 [2020-10-27 20:31:41,913 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 20:31:41,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 20:31:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 20:31:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-27 20:31:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 20:31:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 152 transitions. [2020-10-27 20:31:41,922 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 152 transitions. Word has length 103 [2020-10-27 20:31:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:41,922 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 152 transitions. [2020-10-27 20:31:41,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 20:31:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 152 transitions. [2020-10-27 20:31:41,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 20:31:41,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:41,923 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:41,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 20:31:41,923 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:41,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:41,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1135453817, now seen corresponding path program 45 times [2020-10-27 20:31:41,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:41,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836704815] [2020-10-27 20:31:41,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:41,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:42,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:43,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:43,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 20:31:43,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:43,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1902 [2020-10-27 20:31:43,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:43,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 20:31:43,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:43,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 20:31:43,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:45,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:45,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:45,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:45,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:45,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:45,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:45,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:45,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 91 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:45,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836704815] [2020-10-27 20:31:45,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:45,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 20:31:45,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108909332] [2020-10-27 20:31:45,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 20:31:45,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:45,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 20:31:45,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:31:45,492 INFO L87 Difference]: Start difference. First operand 106 states and 152 transitions. Second operand 49 states. [2020-10-27 20:31:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:49,452 INFO L93 Difference]: Finished difference Result 116 states and 165 transitions. [2020-10-27 20:31:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 20:31:49,453 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 105 [2020-10-27 20:31:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:49,455 INFO L225 Difference]: With dead ends: 116 [2020-10-27 20:31:49,455 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 20:31:49,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 20:31:49,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 20:31:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-27 20:31:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 20:31:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 155 transitions. [2020-10-27 20:31:49,463 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 155 transitions. Word has length 105 [2020-10-27 20:31:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:49,463 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 155 transitions. [2020-10-27 20:31:49,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 20:31:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 155 transitions. [2020-10-27 20:31:49,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 20:31:49,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:49,464 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:49,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 20:31:49,465 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:49,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1593705868, now seen corresponding path program 46 times [2020-10-27 20:31:49,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:49,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492696881] [2020-10-27 20:31:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:49,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:49,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:50,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:51,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:51,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 20:31:51,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:51,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1970 [2020-10-27 20:31:51,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:51,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 20:31:51,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:51,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 20:31:51,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:53,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:53,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:53,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:53,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:53,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:53,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:53,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:53,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 93 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:53,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492696881] [2020-10-27 20:31:53,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:53,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 20:31:53,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679313485] [2020-10-27 20:31:53,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 20:31:53,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 20:31:53,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:31:53,177 INFO L87 Difference]: Start difference. First operand 108 states and 155 transitions. Second operand 50 states. [2020-10-27 20:31:57,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:57,270 INFO L93 Difference]: Finished difference Result 118 states and 168 transitions. [2020-10-27 20:31:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 20:31:57,271 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2020-10-27 20:31:57,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:57,272 INFO L225 Difference]: With dead ends: 118 [2020-10-27 20:31:57,272 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 20:31:57,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 20:31:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 20:31:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-27 20:31:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 20:31:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 158 transitions. [2020-10-27 20:31:57,287 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 158 transitions. Word has length 107 [2020-10-27 20:31:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:57,288 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 158 transitions. [2020-10-27 20:31:57,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 20:31:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 158 transitions. [2020-10-27 20:31:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 20:31:57,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:57,289 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:57,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 20:31:57,289 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash -91145297, now seen corresponding path program 47 times [2020-10-27 20:31:57,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:57,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502678709] [2020-10-27 20:31:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:57,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:57,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:58,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:59,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:59,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 20:31:59,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:59,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1955 [2020-10-27 20:31:59,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:59,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 20:31:59,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:59,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 20:31:59,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:01,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:01,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:01,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:01,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:01,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:01,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:01,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:01,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 95 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:01,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502678709] [2020-10-27 20:32:01,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:01,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 20:32:01,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657533310] [2020-10-27 20:32:01,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 20:32:01,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:01,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 20:32:01,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:32:01,098 INFO L87 Difference]: Start difference. First operand 110 states and 158 transitions. Second operand 51 states. [2020-10-27 20:32:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:05,349 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2020-10-27 20:32:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 20:32:05,349 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 109 [2020-10-27 20:32:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:05,351 INFO L225 Difference]: With dead ends: 120 [2020-10-27 20:32:05,351 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:32:05,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 20:32:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:32:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-27 20:32:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 20:32:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 161 transitions. [2020-10-27 20:32:05,361 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 161 transitions. Word has length 109 [2020-10-27 20:32:05,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:05,361 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 161 transitions. [2020-10-27 20:32:05,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 20:32:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 161 transitions. [2020-10-27 20:32:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 20:32:05,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:05,362 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:05,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 20:32:05,363 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:05,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:05,363 INFO L82 PathProgramCache]: Analyzing trace with hash 760551978, now seen corresponding path program 48 times [2020-10-27 20:32:05,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:05,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094417958] [2020-10-27 20:32:05,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:05,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:05,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:06,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:07,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:07,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 20:32:07,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:07,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2158 [2020-10-27 20:32:07,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:07,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 20:32:07,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:07,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 20:32:07,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:09,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:09,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:09,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:09,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:09,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:09,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:32:09,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:09,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:09,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:09,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:09,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 97 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:09,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094417958] [2020-10-27 20:32:09,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:09,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 20:32:09,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987268173] [2020-10-27 20:32:09,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 20:32:09,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:09,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 20:32:09,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 20:32:09,502 INFO L87 Difference]: Start difference. First operand 112 states and 161 transitions. Second operand 52 states. [2020-10-27 20:32:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:13,705 INFO L93 Difference]: Finished difference Result 122 states and 174 transitions. [2020-10-27 20:32:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 20:32:13,706 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 111 [2020-10-27 20:32:13,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:13,708 INFO L225 Difference]: With dead ends: 122 [2020-10-27 20:32:13,708 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 20:32:13,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 20:32:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 20:32:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-27 20:32:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 20:32:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 164 transitions. [2020-10-27 20:32:13,715 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 164 transitions. Word has length 111 [2020-10-27 20:32:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:13,716 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 164 transitions. [2020-10-27 20:32:13,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 20:32:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 164 transitions. [2020-10-27 20:32:13,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 20:32:13,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:13,717 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:13,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 20:32:13,717 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:13,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1097120283, now seen corresponding path program 49 times [2020-10-27 20:32:13,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:13,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389342933] [2020-10-27 20:32:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:13,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:13,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:14,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:16,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 20:32:16,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:16,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2298 [2020-10-27 20:32:16,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 20:32:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 20:32:16,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:18,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:18,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:18,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:18,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:18,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:32:18,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:18,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:18,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:18,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:18,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 99 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:18,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389342933] [2020-10-27 20:32:18,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:18,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 20:32:18,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053539112] [2020-10-27 20:32:18,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 20:32:18,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:18,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 20:32:18,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:32:18,085 INFO L87 Difference]: Start difference. First operand 114 states and 164 transitions. Second operand 53 states. [2020-10-27 20:32:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:22,693 INFO L93 Difference]: Finished difference Result 124 states and 177 transitions. [2020-10-27 20:32:22,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 20:32:22,693 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 113 [2020-10-27 20:32:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:22,695 INFO L225 Difference]: With dead ends: 124 [2020-10-27 20:32:22,695 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 20:32:22,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 20:32:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 20:32:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-27 20:32:22,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 20:32:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 167 transitions. [2020-10-27 20:32:22,704 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 167 transitions. Word has length 113 [2020-10-27 20:32:22,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:22,704 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 167 transitions. [2020-10-27 20:32:22,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 20:32:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 167 transitions. [2020-10-27 20:32:22,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 20:32:22,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:22,705 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:22,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 20:32:22,705 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:22,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:22,706 INFO L82 PathProgramCache]: Analyzing trace with hash 386232032, now seen corresponding path program 50 times [2020-10-27 20:32:22,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:22,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143420618] [2020-10-27 20:32:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:22,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:22,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:23,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:24,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:24,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 20:32:24,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:24,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2271 [2020-10-27 20:32:24,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:24,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 20:32:24,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:24,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 20:32:24,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:27,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:27,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:27,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:27,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:27,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:27,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:27,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:27,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:27,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:27,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:27,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 101 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:27,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143420618] [2020-10-27 20:32:27,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:27,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 20:32:27,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172969980] [2020-10-27 20:32:27,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 20:32:27,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:27,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 20:32:27,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:32:27,089 INFO L87 Difference]: Start difference. First operand 116 states and 167 transitions. Second operand 54 states. [2020-10-27 20:32:31,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:31,865 INFO L93 Difference]: Finished difference Result 126 states and 180 transitions. [2020-10-27 20:32:31,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 20:32:31,866 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 115 [2020-10-27 20:32:31,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:31,867 INFO L225 Difference]: With dead ends: 126 [2020-10-27 20:32:31,868 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 20:32:31,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 20:32:31,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 20:32:31,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 20:32:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 20:32:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 170 transitions. [2020-10-27 20:32:31,877 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 170 transitions. Word has length 115 [2020-10-27 20:32:31,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:31,878 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 170 transitions. [2020-10-27 20:32:31,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 20:32:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 170 transitions. [2020-10-27 20:32:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 20:32:31,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:31,879 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:31,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 20:32:31,879 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:31,879 INFO L82 PathProgramCache]: Analyzing trace with hash -41335525, now seen corresponding path program 51 times [2020-10-27 20:32:31,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:31,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843407934] [2020-10-27 20:32:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:31,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:31,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:32,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:34,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:34,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 20:32:34,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:34,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2526 [2020-10-27 20:32:34,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:34,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 20:32:34,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:34,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 20:32:34,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:36,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:36,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:36,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:36,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:36,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:36,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:36,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:36,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 103 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:36,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843407934] [2020-10-27 20:32:36,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:36,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 20:32:36,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069764012] [2020-10-27 20:32:36,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 20:32:36,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:36,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 20:32:36,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:32:36,590 INFO L87 Difference]: Start difference. First operand 118 states and 170 transitions. Second operand 55 states. [2020-10-27 20:32:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:41,615 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2020-10-27 20:32:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 20:32:41,616 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 117 [2020-10-27 20:32:41,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:41,617 INFO L225 Difference]: With dead ends: 128 [2020-10-27 20:32:41,617 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 20:32:41,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 20:32:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 20:32:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-27 20:32:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 20:32:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 173 transitions. [2020-10-27 20:32:41,628 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 173 transitions. Word has length 117 [2020-10-27 20:32:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:41,628 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 173 transitions. [2020-10-27 20:32:41,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 20:32:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 173 transitions. [2020-10-27 20:32:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 20:32:41,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:41,629 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:41,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 20:32:41,629 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1383102614, now seen corresponding path program 52 times [2020-10-27 20:32:41,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:41,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179533902] [2020-10-27 20:32:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:41,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:41,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:43,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:44,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:44,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 20:32:44,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:44,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2566 [2020-10-27 20:32:44,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:44,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 20:32:44,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:44,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 20:32:44,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:46,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:46,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:46,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:46,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:46,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:46,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:32:46,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:46,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:46,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:46,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:46,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 105 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:46,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179533902] [2020-10-27 20:32:46,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:46,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 20:32:46,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913447129] [2020-10-27 20:32:46,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 20:32:46,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:46,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 20:32:46,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 20:32:46,423 INFO L87 Difference]: Start difference. First operand 120 states and 173 transitions. Second operand 56 states. [2020-10-27 20:32:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:51,395 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2020-10-27 20:32:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 20:32:51,396 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 119 [2020-10-27 20:32:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:51,397 INFO L225 Difference]: With dead ends: 130 [2020-10-27 20:32:51,397 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 20:32:51,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-27 20:32:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 20:32:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-27 20:32:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 20:32:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 176 transitions. [2020-10-27 20:32:51,408 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 176 transitions. Word has length 119 [2020-10-27 20:32:51,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:51,408 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 176 transitions. [2020-10-27 20:32:51,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 20:32:51,408 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 176 transitions. [2020-10-27 20:32:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 20:32:51,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:51,409 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:51,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 20:32:51,409 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:51,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:51,410 INFO L82 PathProgramCache]: Analyzing trace with hash 173586769, now seen corresponding path program 53 times [2020-10-27 20:32:51,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:51,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039753767] [2020-10-27 20:32:51,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:51,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:51,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:52,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:54,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:54,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 20:32:54,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:54,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2605 [2020-10-27 20:32:54,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:54,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 20:32:54,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:54,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 20:32:54,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:56,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:56,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:56,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:56,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:56,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:56,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:56,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:56,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:56,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:56,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:56,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 107 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:56,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039753767] [2020-10-27 20:32:56,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:56,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 20:32:56,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796632142] [2020-10-27 20:32:56,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 20:32:56,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:56,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 20:32:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:32:56,317 INFO L87 Difference]: Start difference. First operand 122 states and 176 transitions. Second operand 57 states. [2020-10-27 20:33:01,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:01,726 INFO L93 Difference]: Finished difference Result 132 states and 189 transitions. [2020-10-27 20:33:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 20:33:01,727 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 121 [2020-10-27 20:33:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:01,728 INFO L225 Difference]: With dead ends: 132 [2020-10-27 20:33:01,728 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 20:33:01,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-27 20:33:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 20:33:01,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-27 20:33:01,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 20:33:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 179 transitions. [2020-10-27 20:33:01,739 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 179 transitions. Word has length 121 [2020-10-27 20:33:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:01,739 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 179 transitions. [2020-10-27 20:33:01,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 20:33:01,739 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 179 transitions. [2020-10-27 20:33:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 20:33:01,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:01,740 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:01,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 20:33:01,740 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:01,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:01,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1764996940, now seen corresponding path program 54 times [2020-10-27 20:33:01,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:01,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767493563] [2020-10-27 20:33:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:01,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:02,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:02,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:04,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:04,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 20:33:04,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:33:04,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2888 [2020-10-27 20:33:04,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:04,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 20:33:04,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:33:04,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 20:33:04,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:06,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:06,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:06,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:06,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:06,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:06,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:33:06,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:06,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:06,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:06,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:06,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 109 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:06,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767493563] [2020-10-27 20:33:06,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:06,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 20:33:06,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770622330] [2020-10-27 20:33:06,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 20:33:06,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:06,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 20:33:06,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 20:33:06,977 INFO L87 Difference]: Start difference. First operand 124 states and 179 transitions. Second operand 58 states.