/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/Problem02_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:40:47,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:40:47,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:40:47,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:40:47,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:40:47,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:40:47,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:40:47,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:40:47,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:40:47,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:40:47,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:40:47,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:40:47,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:40:47,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:40:47,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:40:47,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:40:47,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:40:47,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:40:47,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:40:47,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:40:47,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:40:47,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:40:47,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:40:47,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:40:47,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:40:47,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:40:47,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:40:47,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:40:47,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:40:47,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:40:47,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:40:47,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:40:47,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:40:47,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:40:47,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:40:47,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:40:47,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:40:47,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:40:47,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:40:47,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:40:47,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:40:47,268 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 21:40:47,294 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:40:47,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:40:47,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:40:47,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:40:47,296 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:40:47,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:40:47,296 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:40:47,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:40:47,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:40:47,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:40:47,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:40:47,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:40:47,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:40:47,298 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:40:47,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:40:47,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:40:47,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:40:47,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:40:47,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:40:47,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:40:47,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:40:47,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:40:47,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:40:47,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:40:47,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:40:47,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:40:47,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:40:47,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:40:47,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:40:47,301 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 21:40:47,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:40:47,782 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:40:47,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:40:47,790 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:40:47,791 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:40:47,792 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label01.c [2020-09-24 21:40:47,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87a980d2e/ccbcd7f1028141ee99a7f3465a944eed/FLAG45693b015 [2020-09-24 21:40:48,577 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:40:48,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label01.c [2020-09-24 21:40:48,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87a980d2e/ccbcd7f1028141ee99a7f3465a944eed/FLAG45693b015 [2020-09-24 21:40:48,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87a980d2e/ccbcd7f1028141ee99a7f3465a944eed [2020-09-24 21:40:48,813 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:40:48,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:40:48,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:48,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:40:48,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:40:48,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:48" (1/1) ... [2020-09-24 21:40:48,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@194bd3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:48, skipping insertion in model container [2020-09-24 21:40:48,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:48" (1/1) ... [2020-09-24 21:40:48,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:40:48,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:40:49,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:49,378 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:40:49,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:49,671 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:40:49,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:49 WrapperNode [2020-09-24 21:40:49,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:49,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:40:49,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:40:49,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:40:49,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:49" (1/1) ... [2020-09-24 21:40:49,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:49" (1/1) ... [2020-09-24 21:40:49,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:49" (1/1) ... [2020-09-24 21:40:49,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:49" (1/1) ... [2020-09-24 21:40:49,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:49" (1/1) ... [2020-09-24 21:40:49,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:49" (1/1) ... [2020-09-24 21:40:49,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:49" (1/1) ... [2020-09-24 21:40:49,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:40:49,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:40:49,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:40:49,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:40:49,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:49" (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 21:40:49,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:40:49,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:40:49,865 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:40:49,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:40:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:40:49,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:40:49,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:40:49,866 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:40:49,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:40:49,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:40:49,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:40:51,314 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:40:51,314 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:40:51,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:51 BoogieIcfgContainer [2020-09-24 21:40:51,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:40:51,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:40:51,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:40:51,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:40:51,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:40:48" (1/3) ... [2020-09-24 21:40:51,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a66a94e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:51, skipping insertion in model container [2020-09-24 21:40:51,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:49" (2/3) ... [2020-09-24 21:40:51,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a66a94e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:51, skipping insertion in model container [2020-09-24 21:40:51,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:51" (3/3) ... [2020-09-24 21:40:51,350 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label01.c [2020-09-24 21:40:51,364 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:40:51,381 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:40:51,405 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:40:51,453 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:40:51,454 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:40:51,454 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:40:51,454 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:40:51,454 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:40:51,455 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:40:51,455 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:40:51,455 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:40:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:40:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 21:40:51,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:51,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:51,541 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:51,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1587967458, now seen corresponding path program 1 times [2020-09-24 21:40:51,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:51,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840094341] [2020-09-24 21:40:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:52,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:52,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:52,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:54,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:55,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:55,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:55,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:56,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 21:40:56,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:40:56,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-09-24 21:40:56,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:40:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:40:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:40:56,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:40:57,494 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-09-24 21:40:57,731 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-09-24 21:40:57,948 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 45 [2020-09-24 21:40:58,132 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2020-09-24 21:40:58,321 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2020-09-24 21:40:58,484 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 31 [2020-09-24 21:40:58,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:58,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:58,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:58,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:40:58,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:58,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-24 21:40:58,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:58,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:40:58,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:58,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:40:58,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:58,943 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 21:40:58,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840094341] [2020-09-24 21:40:58,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:40:58,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:40:58,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133722512] [2020-09-24 21:40:58,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:40:58,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:58,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:40:58,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:40:58,977 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:40:59,544 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-09-24 21:40:59,853 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2020-09-24 21:41:00,197 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 98 [2020-09-24 21:41:00,572 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 95 [2020-09-24 21:41:01,140 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-09-24 21:41:01,519 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-09-24 21:41:02,088 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 91 [2020-09-24 21:41:02,253 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-24 21:41:03,627 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2020-09-24 21:41:03,885 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-09-24 21:41:04,280 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-09-24 21:41:05,204 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-09-24 21:41:05,565 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-09-24 21:41:05,830 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2020-09-24 21:41:06,092 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-09-24 21:41:07,385 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-24 21:41:07,906 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-09-24 21:41:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:11,166 INFO L93 Difference]: Finished difference Result 1869 states and 2661 transitions. [2020-09-24 21:41:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:41:11,168 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 139 [2020-09-24 21:41:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:11,233 INFO L225 Difference]: With dead ends: 1869 [2020-09-24 21:41:11,233 INFO L226 Difference]: Without dead ends: 1239 [2020-09-24 21:41:11,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:41:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-09-24 21:41:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1076. [2020-09-24 21:41:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:41:11,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1293 transitions. [2020-09-24 21:41:11,437 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1293 transitions. Word has length 139 [2020-09-24 21:41:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:11,438 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1293 transitions. [2020-09-24 21:41:11,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:41:11,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1293 transitions. [2020-09-24 21:41:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-24 21:41:11,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:11,446 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:11,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:41:11,446 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:11,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1816238400, now seen corresponding path program 1 times [2020-09-24 21:41:11,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:11,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566218138] [2020-09-24 21:41:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:11,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:11,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:11,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:12,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:13,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:13,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:15,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:16,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-09-24 21:41:16,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:41:16,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-24 21:41:16,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:16,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:41:16,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:16,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:41:16,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:16,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:16,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:17,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:17,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:17,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:17,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 21:41:17,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:17,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:17,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:17,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:17,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:17,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:17,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:17,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:17,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:17,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:41:17,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:17,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-24 21:41:17,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:17,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:17,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:17,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:41:17,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:17,429 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-09-24 21:41:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:41:17,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566218138] [2020-09-24 21:41:17,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:17,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:41:17,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994712777] [2020-09-24 21:41:17,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:41:17,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:17,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:41:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:41:17,764 INFO L87 Difference]: Start difference. First operand 1076 states and 1293 transitions. Second operand 20 states. [2020-09-24 21:41:18,471 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-09-24 21:41:18,726 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-09-24 21:41:19,154 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-09-24 21:41:19,504 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-09-24 21:41:19,752 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-09-24 21:41:20,450 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-09-24 21:41:20,728 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-09-24 21:41:21,136 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-09-24 21:41:21,352 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-09-24 21:41:21,500 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-09-24 21:41:21,755 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2020-09-24 21:41:21,999 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-09-24 21:41:22,287 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-09-24 21:41:23,122 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-09-24 21:41:23,453 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2020-09-24 21:41:23,822 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-09-24 21:41:24,461 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2020-09-24 21:41:24,872 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-09-24 21:41:25,678 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2020-09-24 21:41:25,942 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-09-24 21:41:26,542 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-09-24 21:41:27,013 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-09-24 21:41:27,542 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2020-09-24 21:41:27,843 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-09-24 21:41:30,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:30,113 INFO L93 Difference]: Finished difference Result 4502 states and 6133 transitions. [2020-09-24 21:41:30,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-24 21:41:30,114 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 161 [2020-09-24 21:41:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:30,144 INFO L225 Difference]: With dead ends: 4502 [2020-09-24 21:41:30,145 INFO L226 Difference]: Without dead ends: 3506 [2020-09-24 21:41:30,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=995, Invalid=2787, Unknown=0, NotChecked=0, Total=3782 [2020-09-24 21:41:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2020-09-24 21:41:30,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 3419. [2020-09-24 21:41:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3419 states. [2020-09-24 21:41:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 4144 transitions. [2020-09-24 21:41:30,300 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 4144 transitions. Word has length 161 [2020-09-24 21:41:30,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:30,301 INFO L479 AbstractCegarLoop]: Abstraction has 3419 states and 4144 transitions. [2020-09-24 21:41:30,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:41:30,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 4144 transitions. [2020-09-24 21:41:30,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-09-24 21:41:30,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:30,318 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:30,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:41:30,319 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:30,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1646707211, now seen corresponding path program 1 times [2020-09-24 21:41:30,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:30,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272803833] [2020-09-24 21:41:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:30,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:30,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:30,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:30,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:32,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:32,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:33,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:35,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-09-24 21:41:35,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:41:35,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 21:41:35,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:41:35,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:41:35,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:41:35,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:35,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:35,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:35,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:35,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:35,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 21:41:35,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:35,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:35,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:35,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:35,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:41:35,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:35,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:35,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:41:35,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:35,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 21:41:35,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:35,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:35,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:35,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:41:35,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:35,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:41:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:35,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:35,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:41:35,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:35,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-24 21:41:35,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:35,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:35,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:35,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:41:35,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:41:36,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272803833] [2020-09-24 21:41:36,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:36,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:41:36,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492865386] [2020-09-24 21:41:36,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:41:36,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:36,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:41:36,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:41:36,208 INFO L87 Difference]: Start difference. First operand 3419 states and 4144 transitions. Second operand 13 states.