/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=LOWLEXORDER --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_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:38:51,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:38:51,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:38:51,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:38:51,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:38:51,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:38:51,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:38:51,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:38:51,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:38:51,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:38:51,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:38:51,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:38:51,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:38:51,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:38:51,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:38:51,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:38:51,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:38:51,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:38:51,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:38:51,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:38:51,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:38:51,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:38:51,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:38:51,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:38:51,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:38:51,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:38:51,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:38:51,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:38:51,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:38:51,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:38:51,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:38:51,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:38:51,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:38:51,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:38:51,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:38:51,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:38:51,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:38:51,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:38:51,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:38:51,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:38:51,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:38:51,360 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 21:38:51,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:38:51,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:38:51,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:38:51,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:38:51,413 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:38:51,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:38:51,414 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:38:51,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:38:51,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:38:51,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:38:51,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:38:51,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:38:51,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:38:51,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:38:51,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:38:51,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:38:51,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:38:51,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:38:51,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:38:51,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:38:51,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:38:51,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:38:51,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:38:51,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:38:51,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:38:51,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:38:51,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:38:51,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:38:51,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:38:51,421 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:38:51,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:38:51,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:38:51,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:38:51,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:38:51,892 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:38:51,893 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label07.c [2020-09-24 21:38:51,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38b002a98/9b308228d5c7484d84fe53188eb3d6db/FLAG6caff5a3c [2020-09-24 21:38:52,656 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:38:52,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label07.c [2020-09-24 21:38:52,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38b002a98/9b308228d5c7484d84fe53188eb3d6db/FLAG6caff5a3c [2020-09-24 21:38:52,874 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38b002a98/9b308228d5c7484d84fe53188eb3d6db [2020-09-24 21:38:52,889 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:38:52,896 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:38:52,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:38:52,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:38:52,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:38:52,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:38:52" (1/1) ... [2020-09-24 21:38:52,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aaec46a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:52, skipping insertion in model container [2020-09-24 21:38:52,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:38:52" (1/1) ... [2020-09-24 21:38:52,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:38:52,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:38:53,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:38:53,469 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:38:53,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:38:53,764 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:38:53,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:53 WrapperNode [2020-09-24 21:38:53,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:38:53,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:38:53,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:38:53,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:38:53,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:53" (1/1) ... [2020-09-24 21:38:53,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:53" (1/1) ... [2020-09-24 21:38:53,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:53" (1/1) ... [2020-09-24 21:38:53,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:53" (1/1) ... [2020-09-24 21:38:53,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:53" (1/1) ... [2020-09-24 21:38:53,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:53" (1/1) ... [2020-09-24 21:38:53,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:53" (1/1) ... [2020-09-24 21:38:53,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:38:53,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:38:53,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:38:53,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:38:53,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:53" (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 21:38:53,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:38:53,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:38:53,967 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:38:53,967 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:38:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:38:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:38:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:38:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:38:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:38:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:38:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:38:55,316 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:38:55,317 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:38:55,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:38:55 BoogieIcfgContainer [2020-09-24 21:38:55,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:38:55,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:38:55,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:38:55,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:38:55,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:38:52" (1/3) ... [2020-09-24 21:38:55,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bdda5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:38:55, skipping insertion in model container [2020-09-24 21:38:55,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:53" (2/3) ... [2020-09-24 21:38:55,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bdda5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:38:55, skipping insertion in model container [2020-09-24 21:38:55,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:38:55" (3/3) ... [2020-09-24 21:38:55,343 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label07.c [2020-09-24 21:38:55,356 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:38:55,368 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:38:55,391 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:38:55,427 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:38:55,427 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:38:55,427 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:38:55,428 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:38:55,428 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:38:55,428 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:38:55,428 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:38:55,428 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:38:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:38:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-24 21:38:55,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:55,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:55,486 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:55,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1257233759, now seen corresponding path program 1 times [2020-09-24 21:38:55,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:55,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91010985] [2020-09-24 21:38:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:55,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:56,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:57,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:00,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:00,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:00,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-09-24 21:39:00,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:39:00,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-09-24 21:39:00,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:00,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:39:00,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:00,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:39:00,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:39:01,686 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-09-24 21:39:01,875 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-09-24 21:39:02,089 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2020-09-24 21:39:02,283 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 42 [2020-09-24 21:39:02,479 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2020-09-24 21:39:02,715 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 37 [2020-09-24 21:39:02,954 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 33 [2020-09-24 21:39:03,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:03,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:03,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:03,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:03,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:03,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-24 21:39:03,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:03,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:39:03,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:03,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:03,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:03,558 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 21:39:03,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91010985] [2020-09-24 21:39:03,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:39:03,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:39:03,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367386179] [2020-09-24 21:39:03,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:39:03,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:03,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:39:03,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:39:03,596 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:39:04,045 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-09-24 21:39:04,240 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-09-24 21:39:04,441 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-09-24 21:39:04,799 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 113 [2020-09-24 21:39:05,157 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 110 [2020-09-24 21:39:05,753 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 107 [2020-09-24 21:39:06,916 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 104 [2020-09-24 21:39:07,575 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 99 [2020-09-24 21:39:08,446 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2020-09-24 21:39:09,093 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-09-24 21:39:10,203 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-09-24 21:39:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:13,176 INFO L93 Difference]: Finished difference Result 1700 states and 2421 transitions. [2020-09-24 21:39:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 21:39:13,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 132 [2020-09-24 21:39:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:13,221 INFO L225 Difference]: With dead ends: 1700 [2020-09-24 21:39:13,221 INFO L226 Difference]: Without dead ends: 1101 [2020-09-24 21:39:13,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 21:39:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-09-24 21:39:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 985. [2020-09-24 21:39:13,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:39:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1148 transitions. [2020-09-24 21:39:13,400 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1148 transitions. Word has length 132 [2020-09-24 21:39:13,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:13,401 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1148 transitions. [2020-09-24 21:39:13,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:39:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1148 transitions. [2020-09-24 21:39:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-24 21:39:13,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:13,415 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:13,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:39:13,416 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:13,416 INFO L82 PathProgramCache]: Analyzing trace with hash 621017006, now seen corresponding path program 1 times [2020-09-24 21:39:13,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:13,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905518007] [2020-09-24 21:39:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:13,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:13,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:13,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:15,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:15,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:15,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:16,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:16,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:18,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:18,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-24 21:39:18,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:39:18,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:39:18,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:18,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:39:18,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:18,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:39:18,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:18,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:18,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:18,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:18,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:18,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:18,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-24 21:39:18,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:18,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:18,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:18,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:18,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:18,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:18,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:18,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:19,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:19,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:19,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:19,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-09-24 21:39:19,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:19,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:39:19,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:19,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:19,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:39:19,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905518007] [2020-09-24 21:39:19,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:19,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:39:19,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504110620] [2020-09-24 21:39:19,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:39:19,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:19,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:39:19,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:39:19,352 INFO L87 Difference]: Start difference. First operand 985 states and 1148 transitions. Second operand 13 states. [2020-09-24 21:39:20,461 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-09-24 21:39:20,971 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-09-24 21:39:21,099 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-09-24 21:39:21,354 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-09-24 21:39:22,897 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-09-24 21:39:25,677 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-09-24 21:39:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:26,512 INFO L93 Difference]: Finished difference Result 2793 states and 3411 transitions. [2020-09-24 21:39:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 21:39:26,513 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-09-24 21:39:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:26,521 INFO L225 Difference]: With dead ends: 2793 [2020-09-24 21:39:26,521 INFO L226 Difference]: Without dead ends: 1339 [2020-09-24 21:39:26,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=378, Invalid=882, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 21:39:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2020-09-24 21:39:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1132. [2020-09-24 21:39:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1132 states. [2020-09-24 21:39:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1300 transitions. [2020-09-24 21:39:26,588 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1300 transitions. Word has length 153 [2020-09-24 21:39:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:26,589 INFO L479 AbstractCegarLoop]: Abstraction has 1132 states and 1300 transitions. [2020-09-24 21:39:26,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:39:26,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1300 transitions. [2020-09-24 21:39:26,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-09-24 21:39:26,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:26,596 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:26,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:39:26,598 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:26,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:26,598 INFO L82 PathProgramCache]: Analyzing trace with hash -522808822, now seen corresponding path program 1 times [2020-09-24 21:39:26,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:26,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472471268] [2020-09-24 21:39:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:26,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:26,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:27,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:27,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:29,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:30,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:31,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:31,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:31,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-09-24 21:39:31,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:39:31,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-09-24 21:39:31,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:31,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-24 21:39:31,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:39:31,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-09-24 21:39:31,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:32,499 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-09-24 21:39:32,718 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-09-24 21:39:32,839 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-09-24 21:39:33,032 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-09-24 21:39:33,304 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2020-09-24 21:39:33,515 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-09-24 21:39:33,763 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-09-24 21:39:33,979 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-09-24 21:39:34,123 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2020-09-24 21:39:34,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:34,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:34,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:34,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:34,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 21:39:34,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:34,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:34,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:34,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:34,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:34,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:39:34,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:34,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 21:39:34,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:34,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:39:34,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:34,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:39:34,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:35,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:39:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:35,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:35,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:35,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:35,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:35,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:35,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-24 21:39:35,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:35,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:39:35,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:35,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:35,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 21:39:35,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472471268] [2020-09-24 21:39:35,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:35,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 21:39:35,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127756091] [2020-09-24 21:39:35,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 21:39:35,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:35,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 21:39:35,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:39:35,458 INFO L87 Difference]: Start difference. First operand 1132 states and 1300 transitions. Second operand 27 states. [2020-09-24 21:39:36,043 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-09-24 21:39:36,301 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2020-09-24 21:39:36,657 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 113 [2020-09-24 21:39:37,204 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 115 [2020-09-24 21:39:37,674 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 110 [2020-09-24 21:39:38,194 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 111 [2020-09-24 21:39:38,761 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 108 [2020-09-24 21:39:39,196 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 113 [2020-09-24 21:39:39,759 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-09-24 21:39:40,255 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 107 [2020-09-24 21:39:40,588 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2020-09-24 21:39:40,785 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-09-24 21:39:41,246 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 96 [2020-09-24 21:39:41,765 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 107 [2020-09-24 21:39:42,146 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 104 [2020-09-24 21:39:42,422 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2020-09-24 21:39:43,121 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 105 [2020-09-24 21:39:43,521 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 96