/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=SMALLESTAMONGWIDE --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_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:14:18,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:14:18,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:14:18,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:14:18,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:14:18,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:14:18,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:14:18,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:14:18,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:14:18,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:14:18,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:14:18,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:14:18,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:14:18,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:14:18,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:14:18,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:14:18,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:14:18,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:14:18,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:14:18,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:14:18,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:14:18,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:14:18,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:14:18,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:14:18,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:14:18,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:14:18,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:14:18,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:14:18,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:14:18,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:14:18,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:14:18,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:14:18,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:14:18,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:14:18,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:14:18,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:14:18,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:14:18,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:14:18,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:14:18,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:14:18,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:14:18,243 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 11:14:18,281 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:14:18,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:14:18,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:14:18,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:14:18,283 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:14:18,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:14:18,284 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:14:18,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:14:18,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:14:18,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:14:18,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:14:18,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:14:18,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:14:18,285 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:14:18,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:14:18,286 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:14:18,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:14:18,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:14:18,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:14:18,287 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:14:18,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:14:18,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:14:18,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:14:18,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:14:18,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:14:18,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:14:18,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:14:18,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:14:18,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:14:18,289 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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:14:18,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:14:18,797 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:14:18,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:14:18,805 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:14:18,806 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:14:18,807 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label39.c [2020-09-25 11:14:18,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/505ee4832/5d370ef2f88f4a4ba36e4959cb70307a/FLAGee1fb3524 [2020-09-25 11:14:19,603 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:14:19,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label39.c [2020-09-25 11:14:19,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/505ee4832/5d370ef2f88f4a4ba36e4959cb70307a/FLAGee1fb3524 [2020-09-25 11:14:19,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/505ee4832/5d370ef2f88f4a4ba36e4959cb70307a [2020-09-25 11:14:19,846 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:14:19,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:14:19,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:14:19,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:14:19,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:14:19,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:14:19" (1/1) ... [2020-09-25 11:14:19,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:19, skipping insertion in model container [2020-09-25 11:14:19,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:14:19" (1/1) ... [2020-09-25 11:14:19,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:14:19,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:14:20,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:14:20,400 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:14:20,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:14:20,643 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:14:20,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:20 WrapperNode [2020-09-25 11:14:20,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:14:20,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:14:20,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:14:20,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:14:20,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:20" (1/1) ... [2020-09-25 11:14:20,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:20" (1/1) ... [2020-09-25 11:14:20,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:20" (1/1) ... [2020-09-25 11:14:20,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:20" (1/1) ... [2020-09-25 11:14:20,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:20" (1/1) ... [2020-09-25 11:14:20,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:20" (1/1) ... [2020-09-25 11:14:20,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:20" (1/1) ... [2020-09-25 11:14:20,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:14:20,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:14:20,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:14:20,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:14:20,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:20" (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 11:14:20,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:14:20,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:14:20,855 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:14:20,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:14:20,856 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:14:20,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:14:20,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:14:20,857 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:14:20,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:14:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:14:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:14:22,313 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:14:22,314 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:14:22,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:14:22 BoogieIcfgContainer [2020-09-25 11:14:22,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:14:22,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:14:22,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:14:22,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:14:22,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:14:19" (1/3) ... [2020-09-25 11:14:22,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:14:22, skipping insertion in model container [2020-09-25 11:14:22,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:20" (2/3) ... [2020-09-25 11:14:22,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:14:22, skipping insertion in model container [2020-09-25 11:14:22,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:14:22" (3/3) ... [2020-09-25 11:14:22,347 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label39.c [2020-09-25 11:14:22,359 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:14:22,377 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:14:22,401 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:14:22,445 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:14:22,447 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:14:22,447 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:14:22,447 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:14:22,447 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:14:22,447 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:14:22,447 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:14:22,448 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:14:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 11:14:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-25 11:14:22,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:22,523 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, 1, 1, 1, 1] [2020-09-25 11:14:22,524 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:22,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2068005297, now seen corresponding path program 1 times [2020-09-25 11:14:22,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:22,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036488076] [2020-09-25 11:14:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:22,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:23,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:23,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:24,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:25,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:25,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:27,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:27,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-25 11:14:27,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:14:27,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 11:14:27,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:27,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:14:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 11:14:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-09-25 11:14:27,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:14:28,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:28,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:28,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:28,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:28,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:28,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 11:14:28,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:28,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:28,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:28,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:28,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:14:28,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:28,308 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 11:14:28,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036488076] [2020-09-25 11:14:28,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:14:28,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:14:28,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630514866] [2020-09-25 11:14:28,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:14:28,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:28,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:14:28,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:14:28,342 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 11:14:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:30,436 INFO L93 Difference]: Finished difference Result 1268 states and 1667 transitions. [2020-09-25 11:14:30,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:14:30,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-09-25 11:14:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:30,471 INFO L225 Difference]: With dead ends: 1268 [2020-09-25 11:14:30,471 INFO L226 Difference]: Without dead ends: 694 [2020-09-25 11:14:30,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:14:30,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-09-25 11:14:30,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 603. [2020-09-25 11:14:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 11:14:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-25 11:14:30,589 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 160 [2020-09-25 11:14:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:30,590 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-25 11:14:30,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:14:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-25 11:14:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-25 11:14:30,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:30,600 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:14:30,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:14:30,600 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:30,601 INFO L82 PathProgramCache]: Analyzing trace with hash 305686135, now seen corresponding path program 1 times [2020-09-25 11:14:30,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:30,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652401106] [2020-09-25 11:14:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:30,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:30,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:30,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:31,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:35,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:35,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-09-25 11:14:35,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:14:35,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 11:14:35,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:35,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:35,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 11:14:35,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 11:14:35,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-25 11:14:35,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:36,469 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-09-25 11:14:36,632 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-09-25 11:14:36,801 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2020-09-25 11:14:37,002 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2020-09-25 11:14:37,149 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-09-25 11:14:37,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:37,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:37,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:37,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:37,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:37,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 11:14:37,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:37,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:37,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:14:37,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:37,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:14:37,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:37,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:37,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:37,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:37,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:14:37,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:37,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 11:14:37,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:37,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:14:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 11:14:37,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:14:37,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652401106] [2020-09-25 11:14:37,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:37,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 11:14:37,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982155816] [2020-09-25 11:14:37,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 11:14:37,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 11:14:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:14:37,687 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 14 states. [2020-09-25 11:14:38,512 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-09-25 11:14:38,901 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 92 [2020-09-25 11:14:39,381 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-09-25 11:14:39,727 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2020-09-25 11:14:39,895 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-09-25 11:14:40,655 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 89 [2020-09-25 11:14:41,547 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2020-09-25 11:14:42,036 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-09-25 11:14:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:42,232 INFO L93 Difference]: Finished difference Result 1284 states and 1593 transitions. [2020-09-25 11:14:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 11:14:42,233 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 181 [2020-09-25 11:14:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:42,240 INFO L225 Difference]: With dead ends: 1284 [2020-09-25 11:14:42,240 INFO L226 Difference]: Without dead ends: 705 [2020-09-25 11:14:42,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2020-09-25 11:14:42,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2020-09-25 11:14:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 684. [2020-09-25 11:14:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2020-09-25 11:14:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 809 transitions. [2020-09-25 11:14:42,290 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 809 transitions. Word has length 181 [2020-09-25 11:14:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:42,291 INFO L479 AbstractCegarLoop]: Abstraction has 684 states and 809 transitions. [2020-09-25 11:14:42,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 11:14:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 809 transitions. [2020-09-25 11:14:42,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-09-25 11:14:42,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:42,296 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 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 11:14:42,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:14:42,297 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:42,297 INFO L82 PathProgramCache]: Analyzing trace with hash -166930083, now seen corresponding path program 1 times [2020-09-25 11:14:42,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:42,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780560580] [2020-09-25 11:14:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:42,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:42,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:43,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:43,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:44,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:45,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:46,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:47,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:47,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:47,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-09-25 11:14:47,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:14:47,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-25 11:14:47,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:47,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:47,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 11:14:47,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 11:14:47,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-25 11:14:47,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:47,951 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-09-25 11:14:48,146 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-09-25 11:14:48,416 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2020-09-25 11:14:48,669 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 46 [2020-09-25 11:14:48,937 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 42 [2020-09-25 11:14:49,156 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 38 [2020-09-25 11:14:49,355 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 34 [2020-09-25 11:14:49,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:49,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:49,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:49,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:49,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:49,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 11:14:49,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:49,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:49,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 11:14:49,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:49,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:49,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:49,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:49,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:49,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 11:14:49,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:14:49,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-25 11:14:49,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:49,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:49,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:14:49,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:49,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:14:49,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:14:50,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780560580] [2020-09-25 11:14:50,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:50,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 11:14:50,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411088833] [2020-09-25 11:14:50,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 11:14:50,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:50,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 11:14:50,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-09-25 11:14:50,306 INFO L87 Difference]: Start difference. First operand 684 states and 809 transitions. Second operand 20 states. [2020-09-25 11:14:51,430 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-09-25 11:14:51,659 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-09-25 11:14:52,032 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2020-09-25 11:14:52,390 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-09-25 11:14:52,828 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 112 [2020-09-25 11:14:53,619 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 109 [2020-09-25 11:14:54,118 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 106 [2020-09-25 11:14:54,384 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-09-25 11:14:55,420 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-09-25 11:14:55,910 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-09-25 11:14:56,320 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2020-09-25 11:14:56,525 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-09-25 11:14:56,950 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 103 [2020-09-25 11:14:57,223 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-09-25 11:14:58,230 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-09-25 11:14:58,639 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-09-25 11:14:59,263 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2020-09-25 11:15:00,118 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-09-25 11:15:00,407 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-09-25 11:15:00,889 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-09-25 11:15:01,500 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-09-25 11:15:02,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:02,890 INFO L93 Difference]: Finished difference Result 2205 states and 2811 transitions. [2020-09-25 11:15:02,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-25 11:15:02,891 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 182 [2020-09-25 11:15:02,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:02,906 INFO L225 Difference]: With dead ends: 2205 [2020-09-25 11:15:02,906 INFO L226 Difference]: Without dead ends: 1545 [2020-09-25 11:15:02,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=872, Invalid=2208, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 11:15:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-09-25 11:15:02,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1282. [2020-09-25 11:15:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2020-09-25 11:15:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1520 transitions. [2020-09-25 11:15:02,978 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1520 transitions. Word has length 182 [2020-09-25 11:15:02,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:02,979 INFO L479 AbstractCegarLoop]: Abstraction has 1282 states and 1520 transitions. [2020-09-25 11:15:02,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 11:15:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1520 transitions. [2020-09-25 11:15:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-25 11:15:02,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:02,985 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:15:02,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:15:02,986 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:02,987 INFO L82 PathProgramCache]: Analyzing trace with hash 621217626, now seen corresponding path program 1 times [2020-09-25 11:15:02,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:02,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600971995] [2020-09-25 11:15:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:03,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:03,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:03,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:03,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:05,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:05,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:06,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:08,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:08,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-09-25 11:15:08,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:15:08,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 11:15:08,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:08,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:08,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:08,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-25 11:15:08,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-09-25 11:15:08,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:08,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:08,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:08,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:08,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:15:08,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:08,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:15:08,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:08,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:08,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:15:08,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:08,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:15:08,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:08,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:15:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:08,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:08,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:08,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:15:08,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:08,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 11:15:08,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:08,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:08,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:15:08,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:08,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 11:15:08,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:15:08,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600971995] [2020-09-25 11:15:08,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:15:08,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:15:08,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555674479] [2020-09-25 11:15:08,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:15:08,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:08,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:15:08,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:15:08,352 INFO L87 Difference]: Start difference. First operand 1282 states and 1520 transitions. Second operand 5 states.