/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:20:32,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:20:32,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:20:32,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:20:32,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:20:32,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:20:32,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:20:32,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:20:32,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:20:32,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:20:32,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:20:32,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:20:32,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:20:32,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:20:32,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:20:32,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:20:32,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:20:32,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:20:32,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:20:32,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:20:32,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:20:32,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:20:32,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:20:32,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:20:32,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:20:32,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:20:32,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:20:32,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:20:32,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:20:32,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:20:32,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:20:32,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:20:32,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:20:32,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:20:32,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:20:32,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:20:32,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:20:32,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:20:32,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:20:32,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:20:32,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:20:32,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:20:32,433 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:20:32,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:20:32,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:20:32,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:20:32,436 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:20:32,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:20:32,437 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:20:32,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:20:32,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:20:32,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:20:32,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:20:32,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:20:32,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:20:32,439 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:20:32,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:20:32,440 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:20:32,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:20:32,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:20:32,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:20:32,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:20:32,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:20:32,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:20:32,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:20:32,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:20:32,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:20:32,445 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:20:32,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:20:32,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:20:32,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:20:32,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:20:32,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:20:32,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:20:32,911 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:20:32,914 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:20:32,914 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:20:32,916 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2020-09-24 18:20:32,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99bbbb764/a52700912c6b4576b557b5d12a31105e/FLAG98c47319d [2020-09-24 18:20:33,612 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:20:33,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2020-09-24 18:20:33,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99bbbb764/a52700912c6b4576b557b5d12a31105e/FLAG98c47319d [2020-09-24 18:20:33,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99bbbb764/a52700912c6b4576b557b5d12a31105e [2020-09-24 18:20:33,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:20:33,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:20:33,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:20:33,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:20:33,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:20:33,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:20:33" (1/1) ... [2020-09-24 18:20:33,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3225ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:33, skipping insertion in model container [2020-09-24 18:20:33,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:20:33" (1/1) ... [2020-09-24 18:20:33,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:20:33,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:20:34,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:20:34,596 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:20:34,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:20:34,719 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:20:34,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34 WrapperNode [2020-09-24 18:20:34,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:20:34,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:20:34,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:20:34,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:20:34,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:34,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:34,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:34,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:34,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:34,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:34,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... [2020-09-24 18:20:34,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:20:34,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:20:34,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:20:34,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:20:34,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:20:34,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:20:34,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:20:34,903 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 18:20:34,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:20:34,903 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 18:20:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:20:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:20:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:20:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:20:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:20:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:20:36,214 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:20:36,215 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:20:36,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:20:36 BoogieIcfgContainer [2020-09-24 18:20:36,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:20:36,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:20:36,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:20:36,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:20:36,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:20:33" (1/3) ... [2020-09-24 18:20:36,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42df4b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:20:36, skipping insertion in model container [2020-09-24 18:20:36,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:34" (2/3) ... [2020-09-24 18:20:36,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42df4b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:20:36, skipping insertion in model container [2020-09-24 18:20:36,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:20:36" (3/3) ... [2020-09-24 18:20:36,235 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label50.c [2020-09-24 18:20:36,247 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:20:36,259 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:20:36,282 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:20:36,318 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:20:36,319 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:20:36,319 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:20:36,319 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:20:36,319 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:20:36,319 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:20:36,320 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:20:36,320 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:20:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 18:20:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-24 18:20:36,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:36,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:20:36,376 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:36,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:36,382 INFO L82 PathProgramCache]: Analyzing trace with hash 249673445, now seen corresponding path program 1 times [2020-09-24 18:20:36,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:36,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96473516] [2020-09-24 18:20:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:36,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:37,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:37,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:38,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:39,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:39,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:40,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:41,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:41,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-09-24 18:20:41,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:20:41,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-24 18:20:41,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:41,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:20:41,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 18:20:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-24 18:20:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:20:41,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:20:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:41,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:41,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:41,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:20:41,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:41,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-24 18:20:41,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:20:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 18:20:41,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:20:41,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96473516] [2020-09-24 18:20:41,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:20:41,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:20:41,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237838362] [2020-09-24 18:20:41,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:20:41,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:20:41,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:20:41,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:20:41,984 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-24 18:20:44,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:20:44,054 INFO L93 Difference]: Finished difference Result 1212 states and 1611 transitions. [2020-09-24 18:20:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:20:44,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-09-24 18:20:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:20:44,105 INFO L225 Difference]: With dead ends: 1212 [2020-09-24 18:20:44,106 INFO L226 Difference]: Without dead ends: 638 [2020-09-24 18:20:44,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:20:44,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-09-24 18:20:44,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 603. [2020-09-24 18:20:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-24 18:20:44,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-24 18:20:44,223 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 107 [2020-09-24 18:20:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:20:44,225 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-24 18:20:44,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:20:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-24 18:20:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-24 18:20:44,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:44,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:20:44,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:20:44,247 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:44,247 INFO L82 PathProgramCache]: Analyzing trace with hash -191439372, now seen corresponding path program 1 times [2020-09-24 18:20:44,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:44,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038022802] [2020-09-24 18:20:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:44,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:44,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:45,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:45,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:45,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:45,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:48,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:48,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-09-24 18:20:48,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:20:48,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4364 [2020-09-24 18:20:48,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:48,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:20:48,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 18:20:48,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 18:20:48,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:20:48,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:20:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:48,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:48,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:48,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:20:48,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:48,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 18:20:48,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:48,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:20:48,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:48,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:20:48,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:48,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:20:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:48,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:48,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:48,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 18:20:48,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:48,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 18:20:48,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:48,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:20:48,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:48,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:20:48,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:20:48,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038022802] [2020-09-24 18:20:48,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:20:48,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:20:48,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139251272] [2020-09-24 18:20:48,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:20:48,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:20:48,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:20:48,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:20:48,949 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 5 states. [2020-09-24 18:20:51,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:20:51,238 INFO L93 Difference]: Finished difference Result 1499 states and 1862 transitions. [2020-09-24 18:20:51,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:20:51,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-09-24 18:20:51,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:20:51,250 INFO L225 Difference]: With dead ends: 1499 [2020-09-24 18:20:51,250 INFO L226 Difference]: Without dead ends: 920 [2020-09-24 18:20:51,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:20:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-09-24 18:20:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 891. [2020-09-24 18:20:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2020-09-24 18:20:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1045 transitions. [2020-09-24 18:20:51,335 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1045 transitions. Word has length 128 [2020-09-24 18:20:51,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:20:51,335 INFO L479 AbstractCegarLoop]: Abstraction has 891 states and 1045 transitions. [2020-09-24 18:20:51,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:20:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1045 transitions. [2020-09-24 18:20:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-24 18:20:51,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:51,342 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:20:51,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:20:51,343 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:51,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:51,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1459519869, now seen corresponding path program 1 times [2020-09-24 18:20:51,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:51,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641410945] [2020-09-24 18:20:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:51,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:51,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:51,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:51,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:52,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:52,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:52,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:52,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:53,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:56,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:56,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-09-24 18:20:56,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 18:20:56,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-24 18:20:56,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:56,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:20:56,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-09-24 18:20:56,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 18:20:56,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:56,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:20:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:56,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:56,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:56,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:20:56,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:56,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 18:20:56,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:56,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:20:56,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:20:56,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:56,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:20:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:56,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:56,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:56,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 18:20:56,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:56,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 18:20:56,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:56,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:20:56,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:56,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 18:20:56,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:20:56,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641410945] [2020-09-24 18:20:56,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:20:56,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:20:56,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982954645] [2020-09-24 18:20:56,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:20:56,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:20:56,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:20:56,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:20:56,635 INFO L87 Difference]: Start difference. First operand 891 states and 1045 transitions. Second operand 5 states. [2020-09-24 18:20:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:20:58,610 INFO L93 Difference]: Finished difference Result 2276 states and 2773 transitions. [2020-09-24 18:20:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:20:58,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-09-24 18:20:58,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:20:58,625 INFO L225 Difference]: With dead ends: 2276 [2020-09-24 18:20:58,625 INFO L226 Difference]: Without dead ends: 1409 [2020-09-24 18:20:58,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:20:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2020-09-24 18:20:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1177. [2020-09-24 18:20:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1177 states. [2020-09-24 18:20:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1428 transitions. [2020-09-24 18:20:58,671 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1428 transitions. Word has length 132 [2020-09-24 18:20:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:20:58,672 INFO L479 AbstractCegarLoop]: Abstraction has 1177 states and 1428 transitions. [2020-09-24 18:20:58,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:20:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1428 transitions. [2020-09-24 18:20:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-09-24 18:20:58,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:58,679 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:20:58,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:20:58,680 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:58,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:58,680 INFO L82 PathProgramCache]: Analyzing trace with hash -645015236, now seen corresponding path program 1 times [2020-09-24 18:20:58,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:58,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195321608] [2020-09-24 18:20:58,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:58,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:58,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:59,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:59,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:59,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:59,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:59,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:00,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:00,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 18:21:00,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:21:00,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1703 [2020-09-24 18:21:00,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:21:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 18:21:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 18:21:00,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:21:00,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:21:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:00,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:00,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:00,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:21:00,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:00,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-24 18:21:00,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:00,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:21:00,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:21:00,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 18:21:00,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:21:00,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:21:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:00,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:00,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:00,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 18:21:00,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:00,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-24 18:21:00,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:00,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:21:00,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:21:00,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 18:21:00,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:21:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:21:00,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195321608] [2020-09-24 18:21:00,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:21:00,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 18:21:00,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630819358] [2020-09-24 18:21:00,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:21:00,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:21:00,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:21:00,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:21:00,754 INFO L87 Difference]: Start difference. First operand 1177 states and 1428 transitions. Second operand 7 states. [2020-09-24 18:21:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:21:03,063 INFO L93 Difference]: Finished difference Result 3140 states and 3941 transitions. [2020-09-24 18:21:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:21:03,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 137 [2020-09-24 18:21:03,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:21:03,078 INFO L225 Difference]: With dead ends: 3140 [2020-09-24 18:21:03,078 INFO L226 Difference]: Without dead ends: 1839 [2020-09-24 18:21:03,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:21:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2020-09-24 18:21:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1771. [2020-09-24 18:21:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1771 states. [2020-09-24 18:21:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2173 transitions. [2020-09-24 18:21:03,158 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2173 transitions. Word has length 137 [2020-09-24 18:21:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:21:03,159 INFO L479 AbstractCegarLoop]: Abstraction has 1771 states and 2173 transitions. [2020-09-24 18:21:03,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:21:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2173 transitions. [2020-09-24 18:21:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 18:21:03,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:21:03,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:21:03,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:21:03,169 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:21:03,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:21:03,169 INFO L82 PathProgramCache]: Analyzing trace with hash 281598029, now seen corresponding path program 1 times [2020-09-24 18:21:03,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:21:03,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157006656] [2020-09-24 18:21:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:21:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:03,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:03,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:03,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:03,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:03,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:03,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:08,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:08,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-24 18:21:08,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:21:08,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 18:21:08,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:08,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:21:08,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 18:21:08,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 18:21:08,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:21:08,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:21:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:08,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:08,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:08,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:21:08,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:08,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 18:21:08,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:08,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:21:08,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:21:08,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:21:08,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:21:08,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:21:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:08,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:08,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:08,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 18:21:08,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:08,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 18:21:08,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:08,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:21:08,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:21:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:21:08,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:21:08,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 18:21:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:08,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:08,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:08,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 18:21:08,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:08,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-24 18:21:08,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:08,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:21:08,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:21:08,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 18:21:08,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:21:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:21:08,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157006656] [2020-09-24 18:21:08,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:21:08,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:21:08,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914787232] [2020-09-24 18:21:08,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:21:08,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:21:08,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:21:08,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:21:08,613 INFO L87 Difference]: Start difference. First operand 1771 states and 2173 transitions. Second operand 7 states. [2020-09-24 18:21:11,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:21:11,479 INFO L93 Difference]: Finished difference Result 4189 states and 5409 transitions. [2020-09-24 18:21:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 18:21:11,480 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 158 [2020-09-24 18:21:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:21:11,495 INFO L225 Difference]: With dead ends: 4189 [2020-09-24 18:21:11,495 INFO L226 Difference]: Without dead ends: 2228 [2020-09-24 18:21:11,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:21:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2020-09-24 18:21:11,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2028. [2020-09-24 18:21:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2028 states. [2020-09-24 18:21:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2423 transitions. [2020-09-24 18:21:11,580 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2423 transitions. Word has length 158 [2020-09-24 18:21:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:21:11,580 INFO L479 AbstractCegarLoop]: Abstraction has 2028 states and 2423 transitions. [2020-09-24 18:21:11,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:21:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2423 transitions. [2020-09-24 18:21:11,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-24 18:21:11,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:21:11,587 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 18:21:11,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:21:11,588 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:21:11,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:21:11,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1490542447, now seen corresponding path program 1 times [2020-09-24 18:21:11,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:21:11,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453617829] [2020-09-24 18:21:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:21:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:11,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:11,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:11,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:12,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:12,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:13,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:13,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:13,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:16,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:16,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-09-24 18:21:16,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:21:16,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 18:21:16,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:16,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:21:16,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-09-24 18:21:16,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 18:21:16,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:21:16,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:21:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:16,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:16,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:16,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:21:16,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:16,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 18:21:16,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:16,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:21:16,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:21:16,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:21:16,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:21:16,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:21:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:16,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:16,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:16,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:21:16,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:16,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-24 18:21:16,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:16,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:21:16,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:21:16,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 18:21:16,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:21:16,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-24 18:21:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:16,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:16,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:21:16,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 18:21:16,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:21:16,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 18:21:16,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:21:16,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:21:16,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:21:16,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 18:21:16,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:21:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:21:16,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453617829] [2020-09-24 18:21:16,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:21:16,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 18:21:16,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502531364] [2020-09-24 18:21:16,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 18:21:16,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:21:16,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 18:21:16,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:21:16,976 INFO L87 Difference]: Start difference. First operand 2028 states and 2423 transitions. Second operand 8 states. [2020-09-24 18:21:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:21:20,539 INFO L93 Difference]: Finished difference Result 5827 states and 7446 transitions. [2020-09-24 18:21:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 18:21:20,540 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2020-09-24 18:21:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:21:20,561 INFO L225 Difference]: With dead ends: 5827 [2020-09-24 18:21:20,562 INFO L226 Difference]: Without dead ends: 3823 [2020-09-24 18:21:20,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-24 18:21:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2020-09-24 18:21:20,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 3237. [2020-09-24 18:21:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3237 states. [2020-09-24 18:21:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 3833 transitions. [2020-09-24 18:21:20,666 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 3833 transitions. Word has length 166 [2020-09-24 18:21:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:21:20,667 INFO L479 AbstractCegarLoop]: Abstraction has 3237 states and 3833 transitions. [2020-09-24 18:21:20,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 18:21:20,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 3833 transitions. [2020-09-24 18:21:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-24 18:21:20,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:21:20,676 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:21:20,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:21:20,677 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:21:20,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:21:20,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1736106666, now seen corresponding path program 1 times [2020-09-24 18:21:20,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:21:20,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448148475] [2020-09-24 18:21:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:21:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:21:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:20,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:20,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:21,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:21,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:22,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:22,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:21:22,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking...