/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 09:57:04,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 09:57:04,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 09:57:04,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 09:57:04,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 09:57:04,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 09:57:04,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 09:57:04,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 09:57:04,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 09:57:04,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 09:57:04,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 09:57:04,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 09:57:04,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 09:57:04,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 09:57:04,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 09:57:04,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 09:57:04,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 09:57:04,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 09:57:04,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 09:57:04,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 09:57:04,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 09:57:04,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 09:57:04,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 09:57:04,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 09:57:04,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 09:57:04,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 09:57:04,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 09:57:04,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 09:57:04,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 09:57:04,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 09:57:04,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 09:57:04,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 09:57:04,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 09:57:04,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 09:57:04,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 09:57:04,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 09:57:04,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 09:57:04,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 09:57:04,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 09:57:04,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 09:57:04,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 09:57:04,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 09:57:04,434 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 09:57:04,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 09:57:04,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 09:57:04,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 09:57:04,438 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 09:57:04,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 09:57:04,438 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 09:57:04,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 09:57:04,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 09:57:04,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 09:57:04,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 09:57:04,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 09:57:04,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 09:57:04,440 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 09:57:04,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 09:57:04,441 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 09:57:04,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 09:57:04,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 09:57:04,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 09:57:04,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 09:57:04,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 09:57:04,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:57:04,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 09:57:04,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 09:57:04,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 09:57:04,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 09:57:04,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 09:57:04,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 09:57:04,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 09:57:04,444 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 09:57:04,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 09:57:04,804 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 09:57:04,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 09:57:04,811 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 09:57:04,811 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 09:57:04,812 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label02.c [2020-10-13 09:57:04,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e5beda09/128d9328491b41448253c1887c75897d/FLAG294a23d2b [2020-10-13 09:57:05,748 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 09:57:05,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label02.c [2020-10-13 09:57:05,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e5beda09/128d9328491b41448253c1887c75897d/FLAG294a23d2b [2020-10-13 09:57:06,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e5beda09/128d9328491b41448253c1887c75897d [2020-10-13 09:57:06,230 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 09:57:06,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 09:57:06,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 09:57:06,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 09:57:06,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 09:57:06,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:57:06" (1/1) ... [2020-10-13 09:57:06,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d15d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:06, skipping insertion in model container [2020-10-13 09:57:06,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:57:06" (1/1) ... [2020-10-13 09:57:06,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 09:57:06,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 09:57:08,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:57:08,815 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 09:57:09,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:57:09,895 INFO L208 MainTranslator]: Completed translation [2020-10-13 09:57:09,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:09 WrapperNode [2020-10-13 09:57:09,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 09:57:09,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 09:57:09,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 09:57:09,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 09:57:09,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:09" (1/1) ... [2020-10-13 09:57:09,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:09" (1/1) ... [2020-10-13 09:57:10,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:09" (1/1) ... [2020-10-13 09:57:10,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:09" (1/1) ... [2020-10-13 09:57:10,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:09" (1/1) ... [2020-10-13 09:57:10,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:09" (1/1) ... [2020-10-13 09:57:10,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:09" (1/1) ... [2020-10-13 09:57:10,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 09:57:10,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 09:57:10,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 09:57:10,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 09:57:10,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:57:10,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 09:57:10,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 09:57:10,611 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 09:57:10,611 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 09:57:10,611 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 09:57:10,612 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 09:57:10,612 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 09:57:10,612 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 09:57:10,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 09:57:10,612 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 09:57:10,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 09:57:10,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 09:57:10,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 09:57:10,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 09:57:10,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 09:57:10,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 09:57:10,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 09:57:10,614 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 09:57:10,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 09:57:10,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 09:57:10,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 09:57:23,196 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 09:57:23,197 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 09:57:23,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:57:23 BoogieIcfgContainer [2020-10-13 09:57:23,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 09:57:23,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 09:57:23,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 09:57:23,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 09:57:23,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:57:06" (1/3) ... [2020-10-13 09:57:23,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13326d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:57:23, skipping insertion in model container [2020-10-13 09:57:23,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:09" (2/3) ... [2020-10-13 09:57:23,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13326d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:57:23, skipping insertion in model container [2020-10-13 09:57:23,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:57:23" (3/3) ... [2020-10-13 09:57:23,235 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label02.c [2020-10-13 09:57:23,248 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 09:57:23,267 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 09:57:23,283 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 09:57:23,324 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 09:57:23,325 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 09:57:23,325 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 09:57:23,325 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 09:57:23,325 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 09:57:23,325 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 09:57:23,325 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 09:57:23,326 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 09:57:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 09:57:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 09:57:23,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:57:23,406 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] [2020-10-13 09:57:23,406 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:57:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:57:23,415 INFO L82 PathProgramCache]: Analyzing trace with hash 76783818, now seen corresponding path program 1 times [2020-10-13 09:57:23,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:57:23,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508653898] [2020-10-13 09:57:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:57:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:57:23,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:57:24,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:57:24,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 09:57:24,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:57:24,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-13 09:57:24,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:57:24,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:57:24,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:57:24,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 09:57:24,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 09:57:24,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:57:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:57:24,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:57:24,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:57:24,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:57:24,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:57:24,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 09:57:24,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:57:24,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:57:24,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:57:24,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:57:24,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:57:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:57:24,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508653898] [2020-10-13 09:57:24,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:57:24,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 09:57:24,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247468693] [2020-10-13 09:57:24,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:57:24,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:57:24,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:57:24,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:57:24,478 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 5 states. [2020-10-13 09:58:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:58:03,939 INFO L93 Difference]: Finished difference Result 6459 states and 12276 transitions. [2020-10-13 09:58:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 09:58:03,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-13 09:58:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:58:03,990 INFO L225 Difference]: With dead ends: 6459 [2020-10-13 09:58:03,991 INFO L226 Difference]: Without dead ends: 4614 [2020-10-13 09:58:04,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 09:58:04,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4614 states. [2020-10-13 09:58:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4614 to 4606. [2020-10-13 09:58:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4606 states. [2020-10-13 09:58:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4606 states to 4606 states and 6986 transitions. [2020-10-13 09:58:04,204 INFO L78 Accepts]: Start accepts. Automaton has 4606 states and 6986 transitions. Word has length 72 [2020-10-13 09:58:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:58:04,205 INFO L479 AbstractCegarLoop]: Abstraction has 4606 states and 6986 transitions. [2020-10-13 09:58:04,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:58:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4606 states and 6986 transitions. [2020-10-13 09:58:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 09:58:04,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:58:04,219 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-13 09:58:04,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 09:58:04,221 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:58:04,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:58:04,221 INFO L82 PathProgramCache]: Analyzing trace with hash -590082612, now seen corresponding path program 1 times [2020-10-13 09:58:04,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:58:04,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083498601] [2020-10-13 09:58:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:58:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:04,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:04,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:05,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:05,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:06,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:06,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 09:58:06,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:58:06,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2397 [2020-10-13 09:58:06,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:06,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:58:06,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 09:58:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:58:06,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 09:58:06,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:58:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:06,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:06,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:06,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:58:06,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:58:06,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 09:58:06,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:06,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:58:06,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:58:06,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:58:06,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:58:06,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:58:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:06,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:06,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:06,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 09:58:06,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:58:06,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-13 09:58:06,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:06,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:58:06,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 09:58:06,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:58:06,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:58:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:58:07,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083498601] [2020-10-13 09:58:07,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:58:07,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 09:58:07,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031481528] [2020-10-13 09:58:07,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:58:07,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:58:07,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:58:07,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:58:07,026 INFO L87 Difference]: Start difference. First operand 4606 states and 6986 transitions. Second operand 5 states. [2020-10-13 09:58:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:58:39,170 INFO L93 Difference]: Finished difference Result 13459 states and 20640 transitions. [2020-10-13 09:58:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:58:39,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2020-10-13 09:58:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:58:39,218 INFO L225 Difference]: With dead ends: 13459 [2020-10-13 09:58:39,218 INFO L226 Difference]: Without dead ends: 8859 [2020-10-13 09:58:39,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:58:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8859 states. [2020-10-13 09:58:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8859 to 8844. [2020-10-13 09:58:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8844 states. [2020-10-13 09:58:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8844 states to 8844 states and 12029 transitions. [2020-10-13 09:58:39,464 INFO L78 Accepts]: Start accepts. Automaton has 8844 states and 12029 transitions. Word has length 145 [2020-10-13 09:58:39,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:58:39,465 INFO L479 AbstractCegarLoop]: Abstraction has 8844 states and 12029 transitions. [2020-10-13 09:58:39,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:58:39,465 INFO L276 IsEmpty]: Start isEmpty. Operand 8844 states and 12029 transitions. [2020-10-13 09:58:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 09:58:39,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:58:39,468 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-13 09:58:39,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 09:58:39,469 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:58:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:58:39,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1378900235, now seen corresponding path program 1 times [2020-10-13 09:58:39,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:58:39,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314952503] [2020-10-13 09:58:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:58:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:39,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:39,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:39,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:41,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:41,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 09:58:41,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:58:41,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2112 [2020-10-13 09:58:41,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:41,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 09:58:41,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 09:58:41,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 09:58:41,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:58:41,929 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 22 [2020-10-13 09:58:42,072 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 23 [2020-10-13 09:58:42,210 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 23 [2020-10-13 09:58:42,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:58:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:42,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:42,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:42,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:58:42,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:58:42,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 09:58:42,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:42,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:58:42,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:58:42,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:58:42,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:58:42,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:58:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:42,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:42,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:42,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 09:58:42,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:58:42,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-13 09:58:42,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:42,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:58:42,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:58:42,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 09:58:42,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:58:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:58:42,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314952503] [2020-10-13 09:58:42,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:58:42,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 09:58:42,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89057677] [2020-10-13 09:58:42,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 09:58:42,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:58:42,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 09:58:42,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 09:58:42,549 INFO L87 Difference]: Start difference. First operand 8844 states and 12029 transitions. Second operand 8 states. [2020-10-13 09:58:43,885 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-13 09:58:44,097 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-13 09:58:44,245 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-13 09:59:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:59:25,105 INFO L93 Difference]: Finished difference Result 17946 states and 24375 transitions. [2020-10-13 09:59:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 09:59:25,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 153 [2020-10-13 09:59:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:59:25,151 INFO L225 Difference]: With dead ends: 17946 [2020-10-13 09:59:25,151 INFO L226 Difference]: Without dead ends: 8848 [2020-10-13 09:59:25,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-13 09:59:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8848 states. [2020-10-13 09:59:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8848 to 8844. [2020-10-13 09:59:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8844 states. [2020-10-13 09:59:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8844 states to 8844 states and 12007 transitions. [2020-10-13 09:59:25,391 INFO L78 Accepts]: Start accepts. Automaton has 8844 states and 12007 transitions. Word has length 153 [2020-10-13 09:59:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:59:25,392 INFO L479 AbstractCegarLoop]: Abstraction has 8844 states and 12007 transitions. [2020-10-13 09:59:25,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 09:59:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 8844 states and 12007 transitions. [2020-10-13 09:59:25,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 09:59:25,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:59:25,396 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-13 09:59:25,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 09:59:25,397 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:59:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:59:25,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2082566239, now seen corresponding path program 1 times [2020-10-13 09:59:25,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:59:25,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755375757] [2020-10-13 09:59:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:59:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:25,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:25,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:26,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:27,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:27,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-13 09:59:27,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:59:27,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2204 [2020-10-13 09:59:27,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:27,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:59:27,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-13 09:59:27,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 09:59:27,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:59:27,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:59:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:27,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:27,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:27,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:59:27,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:59:27,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 09:59:27,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:27,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:59:27,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:59:27,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:59:27,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:59:27,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:59:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:28,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:28,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:28,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 09:59:28,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:59:28,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-13 09:59:28,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:59:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:59:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 09:59:28,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:59:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:59:28,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755375757] [2020-10-13 09:59:28,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:59:28,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:59:28,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937298607] [2020-10-13 09:59:28,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:59:28,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:59:28,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:59:28,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:59:28,258 INFO L87 Difference]: Start difference. First operand 8844 states and 12007 transitions. Second operand 5 states. [2020-10-13 10:00:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:00:20,921 INFO L93 Difference]: Finished difference Result 17704 states and 24050 transitions. [2020-10-13 10:00:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:00:20,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2020-10-13 10:00:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:00:20,986 INFO L225 Difference]: With dead ends: 17704 [2020-10-13 10:00:20,987 INFO L226 Difference]: Without dead ends: 8848 [2020-10-13 10:00:21,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:00:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8848 states. [2020-10-13 10:00:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8848 to 8844. [2020-10-13 10:00:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8844 states. [2020-10-13 10:00:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8844 states to 8844 states and 12001 transitions. [2020-10-13 10:00:21,282 INFO L78 Accepts]: Start accepts. Automaton has 8844 states and 12001 transitions. Word has length 173 [2020-10-13 10:00:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:00:21,284 INFO L479 AbstractCegarLoop]: Abstraction has 8844 states and 12001 transitions. [2020-10-13 10:00:21,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:00:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 8844 states and 12001 transitions. [2020-10-13 10:00:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 10:00:21,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:00:21,289 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-13 10:00:21,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:00:21,290 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:00:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:00:21,290 INFO L82 PathProgramCache]: Analyzing trace with hash 445448279, now seen corresponding path program 1 times [2020-10-13 10:00:21,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:00:21,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22502670] [2020-10-13 10:00:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:00:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:21,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:21,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:22,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:22,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:22,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-13 10:00:22,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:00:22,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1550 [2020-10-13 10:00:22,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:22,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:00:22,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-10-13 10:00:22,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:00:22,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:00:23,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:00:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:23,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:23,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:23,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:00:23,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:00:23,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:00:23,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:23,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:00:23,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:00:23,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:00:23,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:00:23,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:00:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:23,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:23,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:23,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 10:00:23,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:00:23,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-13 10:00:23,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:23,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:00:23,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:00:23,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-13 10:00:23,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:00:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:00:23,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22502670] [2020-10-13 10:00:23,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:00:23,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:00:23,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025103375] [2020-10-13 10:00:23,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:00:23,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:00:23,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:00:23,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:00:23,402 INFO L87 Difference]: Start difference. First operand 8844 states and 12001 transitions. Second operand 5 states.