/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:25:39,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:25:39,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:25:39,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:25:39,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:25:39,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:25:39,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:25:39,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:25:39,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:25:39,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:25:39,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:25:39,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:25:39,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:25:39,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:25:39,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:25:39,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:25:39,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:25:39,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:25:39,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:25:39,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:25:39,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:25:39,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:25:39,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:25:39,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:25:39,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:25:39,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:25:39,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:25:39,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:25:39,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:25:39,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:25:39,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:25:39,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:25:39,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:25:39,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:25:39,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:25:39,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:25:39,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:25:39,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:25:39,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:25:39,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:25:39,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:25:39,210 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 [2020-09-25 04:25:39,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:25:39,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:25:39,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:25:39,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:25:39,260 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:25:39,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:25:39,260 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:25:39,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:25:39,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:25:39,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:25:39,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:25:39,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:25:39,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:25:39,263 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:25:39,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:25:39,263 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:25:39,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:25:39,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:25:39,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:25:39,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:25:39,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:25:39,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:25:39,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:25:39,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:25:39,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:25:39,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:25:39,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:25:39,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:25:39,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:25:39,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-09-25 04:25:39,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:25:39,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:25:39,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:25:39,738 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:25:39,739 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:25:39,740 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label43.c [2020-09-25 04:25:39,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df6a0db46/9b8e36a513974549a6f43e74003e0c2b/FLAG04b471630 [2020-09-25 04:25:40,443 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:25:40,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label43.c [2020-09-25 04:25:40,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df6a0db46/9b8e36a513974549a6f43e74003e0c2b/FLAG04b471630 [2020-09-25 04:25:40,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df6a0db46/9b8e36a513974549a6f43e74003e0c2b [2020-09-25 04:25:40,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:25:40,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:25:40,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:25:40,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:25:40,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:25:40,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:25:40" (1/1) ... [2020-09-25 04:25:40,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@469d7643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:25:40, skipping insertion in model container [2020-09-25 04:25:40,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:25:40" (1/1) ... [2020-09-25 04:25:40,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:25:40,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:25:41,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:25:41,232 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:25:41,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:25:41,580 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:25:41,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:25:41 WrapperNode [2020-09-25 04:25:41,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:25:41,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:25:41,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:25:41,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:25:41,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:25:41" (1/1) ... [2020-09-25 04:25:41,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:25:41" (1/1) ... [2020-09-25 04:25:41,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:25:41" (1/1) ... [2020-09-25 04:25:41,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:25:41" (1/1) ... [2020-09-25 04:25:41,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:25:41" (1/1) ... [2020-09-25 04:25:41,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:25:41" (1/1) ... [2020-09-25 04:25:41,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:25:41" (1/1) ... [2020-09-25 04:25:41,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:25:41,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:25:41,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:25:41,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:25:41,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:25:41" (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 [2020-09-25 04:25:41,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:25:41,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:25:41,840 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 04:25:41,840 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:25:41,840 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 04:25:41,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:25:41,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 04:25:41,840 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 04:25:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:25:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:25:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:25:43,272 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:25:43,275 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 04:25:43,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:25:43 BoogieIcfgContainer [2020-09-25 04:25:43,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:25:43,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:25:43,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:25:43,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:25:43,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:25:40" (1/3) ... [2020-09-25 04:25:43,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e38d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:25:43, skipping insertion in model container [2020-09-25 04:25:43,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:25:41" (2/3) ... [2020-09-25 04:25:43,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e38d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:25:43, skipping insertion in model container [2020-09-25 04:25:43,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:25:43" (3/3) ... [2020-09-25 04:25:43,304 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label43.c [2020-09-25 04:25:43,322 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:25:43,333 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:25:43,354 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:25:43,389 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:25:43,389 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:25:43,390 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:25:43,390 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:25:43,390 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:25:43,390 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:25:43,390 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:25:43,390 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:25:43,424 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 04:25:43,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-25 04:25:43,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:25:43,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:25:43,451 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:25:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:25:43,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1333625535, now seen corresponding path program 1 times [2020-09-25 04:25:43,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:25:43,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080368773] [2020-09-25 04:25:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:25:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:25:43,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:44,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:44,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:45,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:45,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:46,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:48,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:48,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:25:48,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-09-25 04:25:48,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 04:25:48,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 04:25:48,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:25:48,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:25:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:25:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 04:25:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-09-25 04:25:48,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 04:25:49,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:25:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:25:49,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:49,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:25:49,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 04:25:49,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:25:49,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 04:25:49,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:25:49,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:25:49,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:25:49,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:25:49,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 04:25:49,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:25:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:25:49,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080368773] [2020-09-25 04:25:49,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:25:49,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 04:25:49,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190595710] [2020-09-25 04:25:49,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:25:49,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:25:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:25:49,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:25:49,304 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 04:25:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:25:51,497 INFO L93 Difference]: Finished difference Result 1235 states and 1633 transitions. [2020-09-25 04:25:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 04:25:51,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2020-09-25 04:25:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:25:51,529 INFO L225 Difference]: With dead ends: 1235 [2020-09-25 04:25:51,529 INFO L226 Difference]: Without dead ends: 661 [2020-09-25 04:25:51,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:25:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-09-25 04:25:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 605. [2020-09-25 04:25:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2020-09-25 04:25:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 715 transitions. [2020-09-25 04:25:51,660 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 715 transitions. Word has length 156 [2020-09-25 04:25:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:25:51,662 INFO L479 AbstractCegarLoop]: Abstraction has 605 states and 715 transitions. [2020-09-25 04:25:51,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:25:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 715 transitions. [2020-09-25 04:25:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-25 04:25:51,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:25:51,676 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:25:51,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:25:51,676 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:25:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:25:51,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1479520420, now seen corresponding path program 1 times [2020-09-25 04:25:51,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:25:51,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968654361] [2020-09-25 04:25:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:25:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:25:51,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:51,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:52,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:52,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:54,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:55,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:56,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:56,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:25:56,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-09-25 04:25:56,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 04:25:56,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 04:25:56,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:25:56,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:25:56,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:25:56,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 04:25:56,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-25 04:25:56,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 04:25:56,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:25:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:25:56,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:56,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:25:56,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 04:25:56,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:25:56,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 04:25:56,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:25:56,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:25:56,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:25:56,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:25:56,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:25:56,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 04:25:56,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 04:25:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:25:56,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:56,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:25:56,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 04:25:56,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:25:56,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 04:25:56,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:25:56,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:25:56,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:25:56,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:25:56,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-25 04:25:56,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:25:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:25:57,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968654361] [2020-09-25 04:25:57,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:25:57,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 04:25:57,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948227512] [2020-09-25 04:25:57,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:25:57,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:25:57,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:25:57,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:25:57,054 INFO L87 Difference]: Start difference. First operand 605 states and 715 transitions. Second operand 5 states. [2020-09-25 04:25:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:25:59,171 INFO L93 Difference]: Finished difference Result 1505 states and 1856 transitions. [2020-09-25 04:25:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:25:59,172 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2020-09-25 04:25:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:25:59,183 INFO L225 Difference]: With dead ends: 1505 [2020-09-25 04:25:59,184 INFO L226 Difference]: Without dead ends: 924 [2020-09-25 04:25:59,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:25:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2020-09-25 04:25:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 891. [2020-09-25 04:25:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2020-09-25 04:25:59,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1084 transitions. [2020-09-25 04:25:59,255 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1084 transitions. Word has length 173 [2020-09-25 04:25:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:25:59,257 INFO L479 AbstractCegarLoop]: Abstraction has 891 states and 1084 transitions. [2020-09-25 04:25:59,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:25:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1084 transitions. [2020-09-25 04:25:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-09-25 04:25:59,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:25:59,268 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:25:59,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:25:59,268 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:25:59,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:25:59,269 INFO L82 PathProgramCache]: Analyzing trace with hash -420325430, now seen corresponding path program 1 times [2020-09-25 04:25:59,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:25:59,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235109057] [2020-09-25 04:25:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:25:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:25:59,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:59,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:59,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:25:59,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:01,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:02,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:04,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:04,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-09-25 04:26:04,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 04:26:04,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-25 04:26:04,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:04,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:26:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 04:26:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 04:26:04,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:26:04,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:26:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:04,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:04,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:04,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 04:26:04,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:26:04,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 04:26:04,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:04,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:04,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:26:04,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:26:04,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:26:04,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:26:04,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 04:26:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:04,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:04,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:04,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 04:26:04,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:26:04,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 04:26:04,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:04,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:04,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:26:04,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:26:04,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:26:04,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:26:04,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 04:26:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:04,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:04,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:04,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 04:26:04,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:26:04,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-25 04:26:04,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:04,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:04,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:26:04,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 04:26:04,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 04:26:04,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:26:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 04:26:04,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235109057] [2020-09-25 04:26:04,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:26:04,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 04:26:04,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962993476] [2020-09-25 04:26:04,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:26:04,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:26:04,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:26:04,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:26:04,763 INFO L87 Difference]: Start difference. First operand 891 states and 1084 transitions. Second operand 7 states. [2020-09-25 04:26:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:26:06,991 INFO L93 Difference]: Finished difference Result 2144 states and 2702 transitions. [2020-09-25 04:26:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 04:26:06,992 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 218 [2020-09-25 04:26:06,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:26:07,003 INFO L225 Difference]: With dead ends: 2144 [2020-09-25 04:26:07,003 INFO L226 Difference]: Without dead ends: 1277 [2020-09-25 04:26:07,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 04:26:07,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2020-09-25 04:26:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1077. [2020-09-25 04:26:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1077 states. [2020-09-25 04:26:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1328 transitions. [2020-09-25 04:26:07,064 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1328 transitions. Word has length 218 [2020-09-25 04:26:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:26:07,064 INFO L479 AbstractCegarLoop]: Abstraction has 1077 states and 1328 transitions. [2020-09-25 04:26:07,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:26:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1328 transitions. [2020-09-25 04:26:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-09-25 04:26:07,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:26:07,072 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:26:07,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:26:07,072 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:26:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:26:07,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1776606615, now seen corresponding path program 1 times [2020-09-25 04:26:07,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:26:07,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329415376] [2020-09-25 04:26:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:26:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:07,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:07,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:07,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:08,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:09,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:09,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:09,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:09,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:10,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:10,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:12,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:12,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-09-25 04:26:12,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 04:26:12,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 04:26:12,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:12,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:12,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 04:26:12,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-09-25 04:26:12,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 04:26:12,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:26:12,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:26:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:12,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:12,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:12,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 04:26:12,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:26:12,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 04:26:12,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:12,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:12,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:26:12,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:26:12,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:26:12,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:26:12,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 04:26:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:12,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:12,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:12,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 04:26:12,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:26:12,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 04:26:12,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:12,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:12,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 04:26:12,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:26:12,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 04:26:12,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:26:12,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 04:26:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:12,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:12,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:12,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 04:26:12,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:26:12,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-25 04:26:12,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:12,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:26:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 04:26:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 04:26:12,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:26:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 04:26:12,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329415376] [2020-09-25 04:26:12,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:26:12,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 04:26:12,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950920564] [2020-09-25 04:26:12,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 04:26:12,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:26:12,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 04:26:12,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-25 04:26:12,773 INFO L87 Difference]: Start difference. First operand 1077 states and 1328 transitions. Second operand 8 states. [2020-09-25 04:26:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:26:16,011 INFO L93 Difference]: Finished difference Result 2857 states and 3593 transitions. [2020-09-25 04:26:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 04:26:16,013 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 225 [2020-09-25 04:26:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:26:16,026 INFO L225 Difference]: With dead ends: 2857 [2020-09-25 04:26:16,026 INFO L226 Difference]: Without dead ends: 1804 [2020-09-25 04:26:16,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-25 04:26:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2020-09-25 04:26:16,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1701. [2020-09-25 04:26:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1701 states. [2020-09-25 04:26:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 2088 transitions. [2020-09-25 04:26:16,101 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 2088 transitions. Word has length 225 [2020-09-25 04:26:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:26:16,101 INFO L479 AbstractCegarLoop]: Abstraction has 1701 states and 2088 transitions. [2020-09-25 04:26:16,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 04:26:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 2088 transitions. [2020-09-25 04:26:16,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-09-25 04:26:16,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:26:16,114 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:26:16,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:26:16,114 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:26:16,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:26:16,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1031297254, now seen corresponding path program 1 times [2020-09-25 04:26:16,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:26:16,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671345895] [2020-09-25 04:26:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:26:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:16,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:16,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:16,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:16,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:16,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:17,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:17,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:17,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:17,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:21,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:21,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-09-25 04:26:21,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 04:26:21,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 04:26:21,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:21,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:21,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:26:21,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 108 [2020-09-25 04:26:21,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-09-25 04:26:21,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:26:21,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:26:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:21,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:21,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:21,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 04:26:21,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:26:21,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 04:26:21,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:21,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:21,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:26:21,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:26:21,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:26:21,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:26:21,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 04:26:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:21,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:21,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:21,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 04:26:21,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:26:21,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 04:26:21,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:21,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:21,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:26:21,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:26:21,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:26:21,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:26:21,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 04:26:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:21,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:21,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:21,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 04:26:21,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:26:21,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-25 04:26:21,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:21,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:21,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:26:21,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:26:21,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 04:26:21,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:26:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-25 04:26:21,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671345895] [2020-09-25 04:26:21,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:26:21,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 04:26:21,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194185663] [2020-09-25 04:26:21,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:26:21,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:26:21,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:26:21,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:26:21,480 INFO L87 Difference]: Start difference. First operand 1701 states and 2088 transitions. Second operand 5 states. [2020-09-25 04:26:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:26:23,500 INFO L93 Difference]: Finished difference Result 3960 states and 4893 transitions. [2020-09-25 04:26:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:26:23,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2020-09-25 04:26:23,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:26:23,512 INFO L225 Difference]: With dead ends: 3960 [2020-09-25 04:26:23,512 INFO L226 Difference]: Without dead ends: 1632 [2020-09-25 04:26:23,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:26:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2020-09-25 04:26:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1622. [2020-09-25 04:26:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1622 states. [2020-09-25 04:26:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 1963 transitions. [2020-09-25 04:26:23,575 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 1963 transitions. Word has length 240 [2020-09-25 04:26:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:26:23,576 INFO L479 AbstractCegarLoop]: Abstraction has 1622 states and 1963 transitions. [2020-09-25 04:26:23,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:26:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 1963 transitions. [2020-09-25 04:26:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-09-25 04:26:23,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:26:23,585 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:26:23,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 04:26:23,586 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:26:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:26:23,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1508954734, now seen corresponding path program 1 times [2020-09-25 04:26:23,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:26:23,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532435512] [2020-09-25 04:26:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:26:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:23,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:23,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:23,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:24,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:24,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:24,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:24,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:24,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:26,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:27,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:27,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:28,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:28,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:28,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:28,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-09-25 04:26:28,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 04:26:28,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 04:26:28,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:28,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:26:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-09-25 04:26:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-25 04:26:28,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:26:28,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:26:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:28,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:28,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:28,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 04:26:28,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:26:28,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 04:26:28,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:28,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:28,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:26:28,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:26:28,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:26:28,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:26:28,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 04:26:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:28,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:28,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:28,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 04:26:28,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:26:28,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 04:26:28,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:28,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:28,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:26:28,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:26:28,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:26:28,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:26:28,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 04:26:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:26:28,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:26:28,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:26:28,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 04:26:28,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:26:28,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 04:26:28,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:26:28,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:26:28,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:26:28,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:26:28,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 04:26:28,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:26:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-25 04:26:28,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532435512] [2020-09-25 04:26:28,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:26:28,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 04:26:28,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829594149] [2020-09-25 04:26:28,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:26:28,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:26:28,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:26:28,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:26:28,950 INFO L87 Difference]: Start difference. First operand 1622 states and 1963 transitions. Second operand 5 states.