/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_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:01:46,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:01:46,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:01:46,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:01:46,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:01:46,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:01:46,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:01:46,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:01:46,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:01:46,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:01:46,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:01:46,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:01:46,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:01:46,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:01:46,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:01:46,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:01:46,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:01:46,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:01:46,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:01:46,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:01:46,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:01:46,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:01:46,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:01:46,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:01:46,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:01:46,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:01:46,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:01:46,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:01:46,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:01:46,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:01:46,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:01:46,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:01:46,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:01:46,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:01:46,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:01:46,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:01:46,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:01:46,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:01:46,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:01:46,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:01:46,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:01:46,468 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 10:01:46,498 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:01:46,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:01:46,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:01:46,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:01:46,502 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:01:46,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:01:46,502 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:01:46,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:01:46,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:01:46,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:01:46,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:01:46,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:01:46,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:01:46,504 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:01:46,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:01:46,506 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:01:46,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:01:46,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:01:46,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:01:46,507 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:01:46,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:01:46,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:01:46,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:01:46,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:01:46,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:01:46,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:01:46,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:01:46,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:01:46,508 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:01:46,509 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 10:01:46,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:01:46,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:01:46,833 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:01:46,835 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:01:46,836 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:01:46,836 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label20.c [2020-10-13 10:01:46,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88bc8ec35/3da28307fffe4fb589330dc7d7aa2827/FLAGa376ae347 [2020-10-13 10:01:47,863 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:01:47,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label20.c [2020-10-13 10:01:47,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88bc8ec35/3da28307fffe4fb589330dc7d7aa2827/FLAGa376ae347 [2020-10-13 10:01:48,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88bc8ec35/3da28307fffe4fb589330dc7d7aa2827 [2020-10-13 10:01:48,275 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:01:48,277 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:01:48,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:01:48,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:01:48,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:01:48,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:01:48" (1/1) ... [2020-10-13 10:01:48,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51800d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:01:48, skipping insertion in model container [2020-10-13 10:01:48,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:01:48" (1/1) ... [2020-10-13 10:01:48,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:01:48,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:01:51,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:01:51,284 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:01:52,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:01:52,343 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:01:52,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:01:52 WrapperNode [2020-10-13 10:01:52,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:01:52,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:01:52,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:01:52,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:01:52,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:01:52" (1/1) ... [2020-10-13 10:01:52,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:01:52" (1/1) ... [2020-10-13 10:01:52,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:01:52" (1/1) ... [2020-10-13 10:01:52,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:01:52" (1/1) ... [2020-10-13 10:01:52,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:01:52" (1/1) ... [2020-10-13 10:01:52,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:01:52" (1/1) ... [2020-10-13 10:01:52,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:01:52" (1/1) ... [2020-10-13 10:01:52,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:01:52,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:01:52,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:01:52,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:01:52,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:01:52" (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 10:01:53,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:01:53,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:01:53,135 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:01:53,136 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:01:53,136 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:01:53,136 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:01:53,136 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:01:53,136 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:01:53,137 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:01:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:01:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:01:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:01:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:01:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:01:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:01:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:01:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:01:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:01:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:01:53,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:01:53,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:02:05,402 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:02:05,403 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:02:05,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:02:05 BoogieIcfgContainer [2020-10-13 10:02:05,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:02:05,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:02:05,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:02:05,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:02:05,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:01:48" (1/3) ... [2020-10-13 10:02:05,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322ac5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:02:05, skipping insertion in model container [2020-10-13 10:02:05,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:01:52" (2/3) ... [2020-10-13 10:02:05,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322ac5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:02:05, skipping insertion in model container [2020-10-13 10:02:05,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:02:05" (3/3) ... [2020-10-13 10:02:05,441 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label20.c [2020-10-13 10:02:05,453 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:02:05,464 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:02:05,480 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:02:05,513 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:02:05,514 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:02:05,514 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:02:05,514 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:02:05,514 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:02:05,514 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:02:05,514 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:02:05,515 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:02:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:02:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:02:05,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:02:05,573 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] [2020-10-13 10:02:05,574 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:02:05,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:02:05,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1256584492, now seen corresponding path program 1 times [2020-10-13 10:02:05,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:02:05,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733839720] [2020-10-13 10:02:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:02:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:05,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:06,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:06,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:02:06,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:06,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-13 10:02:06,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:06,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:02:06,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:02:06,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:02:06,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:02:06,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:02:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:06,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:06,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:06,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:02:06,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:06,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:02:06,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:06,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:02:06,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:02:06,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:02:06,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:02:06,423 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 10:02:06,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733839720] [2020-10-13 10:02:06,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:02:06,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:02:06,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444356081] [2020-10-13 10:02:06,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:02:06,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:02:06,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:02:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:02:06,455 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:02:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:02:32,229 INFO L93 Difference]: Finished difference Result 5030 states and 9452 transitions. [2020-10-13 10:02:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:02:32,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-13 10:02:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:02:32,296 INFO L225 Difference]: With dead ends: 5030 [2020-10-13 10:02:32,297 INFO L226 Difference]: Without dead ends: 3189 [2020-10-13 10:02:32,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:02:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2020-10-13 10:02:32,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 3183. [2020-10-13 10:02:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2020-10-13 10:02:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4964 transitions. [2020-10-13 10:02:32,559 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4964 transitions. Word has length 49 [2020-10-13 10:02:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:02:32,560 INFO L479 AbstractCegarLoop]: Abstraction has 3183 states and 4964 transitions. [2020-10-13 10:02:32,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:02:32,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4964 transitions. [2020-10-13 10:02:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 10:02:32,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:02:32,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:02:32,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:02:32,568 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:02:32,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:02:32,569 INFO L82 PathProgramCache]: Analyzing trace with hash -800487797, now seen corresponding path program 1 times [2020-10-13 10:02:32,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:02:32,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993087218] [2020-10-13 10:02:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:02:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:32,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:32,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:33,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:33,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:33,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:33,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 10:02:33,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:02:33,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-13 10:02:33,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:33,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:02:33,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 10:02:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:02:33,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:02:34,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:02:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:34,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:34,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:34,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:02:34,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:34,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:02:34,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:34,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:02:34,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:02:34,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:02:34,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:02:34,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:02:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:34,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:34,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:34,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:02:34,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:34,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-13 10:02:34,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:02:34,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 10:02:34,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:02:34,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:02:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:02:34,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993087218] [2020-10-13 10:02:34,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:02:34,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:02:34,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498412553] [2020-10-13 10:02:34,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:02:34,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:02:34,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:02:34,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:02:34,195 INFO L87 Difference]: Start difference. First operand 3183 states and 4964 transitions. Second operand 5 states. [2020-10-13 10:03:11,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:03:11,022 INFO L93 Difference]: Finished difference Result 9216 states and 14510 transitions. [2020-10-13 10:03:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:03:11,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-13 10:03:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:03:11,064 INFO L225 Difference]: With dead ends: 9216 [2020-10-13 10:03:11,064 INFO L226 Difference]: Without dead ends: 6039 [2020-10-13 10:03:11,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:03:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6039 states. [2020-10-13 10:03:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6039 to 6023. [2020-10-13 10:03:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6023 states. [2020-10-13 10:03:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 8357 transitions. [2020-10-13 10:03:11,250 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 8357 transitions. Word has length 122 [2020-10-13 10:03:11,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:03:11,251 INFO L479 AbstractCegarLoop]: Abstraction has 6023 states and 8357 transitions. [2020-10-13 10:03:11,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:03:11,251 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 8357 transitions. [2020-10-13 10:03:11,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 10:03:11,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:03:11,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:03:11,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:03:11,255 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:03:11,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:03:11,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1138674249, now seen corresponding path program 1 times [2020-10-13 10:03:11,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:03:11,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947573011] [2020-10-13 10:03:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:03:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:11,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:11,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:11,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:12,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:12,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 10:03:12,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:03:12,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1181 [2020-10-13 10:03:12,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:12,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:03:12,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 10:03:12,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:03:12,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:03:12,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:03:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:12,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:12,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:12,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:03:12,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:12,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:03:12,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:12,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:03:12,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:12,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:03:12,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:12,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:03:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:12,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:12,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:12,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:03:12,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:12,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 10:03:12,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:03:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:03:12,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:03:12,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947573011] [2020-10-13 10:03:12,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:03:12,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:03:12,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889108321] [2020-10-13 10:03:12,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:03:12,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:03:12,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:03:12,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:03:12,833 INFO L87 Difference]: Start difference. First operand 6023 states and 8357 transitions. Second operand 6 states. [2020-10-13 10:04:11,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:04:11,371 INFO L93 Difference]: Finished difference Result 17711 states and 26152 transitions. [2020-10-13 10:04:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:04:11,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-10-13 10:04:11,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:04:11,437 INFO L225 Difference]: With dead ends: 17711 [2020-10-13 10:04:11,438 INFO L226 Difference]: Without dead ends: 11694 [2020-10-13 10:04:11,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:04:11,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11694 states. [2020-10-13 10:04:11,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11694 to 11680. [2020-10-13 10:04:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11680 states. [2020-10-13 10:04:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11680 states to 11680 states and 16007 transitions. [2020-10-13 10:04:11,836 INFO L78 Accepts]: Start accepts. Automaton has 11680 states and 16007 transitions. Word has length 122 [2020-10-13 10:04:11,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:04:11,839 INFO L479 AbstractCegarLoop]: Abstraction has 11680 states and 16007 transitions. [2020-10-13 10:04:11,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:04:11,839 INFO L276 IsEmpty]: Start isEmpty. Operand 11680 states and 16007 transitions. [2020-10-13 10:04:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-13 10:04:11,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:04:11,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:11,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:04:11,862 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:04:11,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:04:11,863 INFO L82 PathProgramCache]: Analyzing trace with hash 971314193, now seen corresponding path program 1 times [2020-10-13 10:04:11,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:04:11,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632608027] [2020-10-13 10:04:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:04:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:12,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:12,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:12,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:13,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:13,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-13 10:04:13,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:04:13,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1870 [2020-10-13 10:04:13,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:13,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:04:13,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 144 [2020-10-13 10:04:13,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:04:13,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:04:14,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:04:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:14,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:14,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:14,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:04:14,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:04:14,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:04:14,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:14,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:04:14,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:04:14,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:04:14,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:04:14,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:04:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:14,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:14,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:14,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 10:04:14,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:04:14,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-13 10:04:14,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:04:14,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:04:14,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-13 10:04:14,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:04:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:04:14,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632608027] [2020-10-13 10:04:14,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:04:14,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:04:14,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583531534] [2020-10-13 10:04:14,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:04:14,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:04:14,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:04:14,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:04:14,654 INFO L87 Difference]: Start difference. First operand 11680 states and 16007 transitions. Second operand 5 states. [2020-10-13 10:05:07,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:05:07,741 INFO L93 Difference]: Finished difference Result 23386 states and 32065 transitions. [2020-10-13 10:05:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:05:07,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 183 [2020-10-13 10:05:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:05:07,819 INFO L225 Difference]: With dead ends: 23386 [2020-10-13 10:05:07,819 INFO L226 Difference]: Without dead ends: 11684 [2020-10-13 10:05:07,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 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 10:05:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11684 states. [2020-10-13 10:05:08,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11684 to 11680. [2020-10-13 10:05:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11680 states. [2020-10-13 10:05:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11680 states to 11680 states and 16001 transitions. [2020-10-13 10:05:08,258 INFO L78 Accepts]: Start accepts. Automaton has 11680 states and 16001 transitions. Word has length 183 [2020-10-13 10:05:08,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:05:08,261 INFO L479 AbstractCegarLoop]: Abstraction has 11680 states and 16001 transitions. [2020-10-13 10:05:08,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:05:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 11680 states and 16001 transitions. [2020-10-13 10:05:08,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-13 10:05:08,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:05:08,269 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 10:05:08,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:05:08,270 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:05:08,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:05:08,270 INFO L82 PathProgramCache]: Analyzing trace with hash 51153192, now seen corresponding path program 1 times [2020-10-13 10:05:08,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:05:08,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174297433] [2020-10-13 10:05:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:05:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:08,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:08,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:08,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:08,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:11,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:12,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:13,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:13,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-13 10:05:13,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:05:13,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:05:13,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:13,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:05:13,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 162 [2020-10-13 10:05:13,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:05:13,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:05:13,529 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-13 10:05:13,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:05:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:13,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:13,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:13,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:05:13,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:13,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:05:13,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:13,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:05:13,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:13,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:05:13,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:13,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:05:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:13,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:13,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:13,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:05:13,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:13,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 10:05:13,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:13,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:05:13,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:13,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:05:13,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:05:13,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 10:05:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:13,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:13,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:13,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:05:13,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:13,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-13 10:05:13,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:13,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:05:13,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:13,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:05:13,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:05:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 10:05:14,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174297433] [2020-10-13 10:05:14,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:05:14,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:05:14,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034070716] [2020-10-13 10:05:14,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:05:14,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:05:14,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:05:14,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:05:14,049 INFO L87 Difference]: Start difference. First operand 11680 states and 16001 transitions. Second operand 6 states.