/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_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:43:40,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:43:40,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:43:40,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:43:40,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:43:40,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:43:40,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:43:40,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:43:40,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:43:40,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:43:40,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:43:40,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:43:40,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:43:40,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:43:40,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:43:40,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:43:40,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:43:40,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:43:40,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:43:40,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:43:40,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:43:40,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:43:40,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:43:40,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:43:40,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:43:40,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:43:40,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:43:40,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:43:40,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:43:40,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:43:40,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:43:40,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:43:40,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:43:40,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:43:40,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:43:40,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:43:40,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:43:40,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:43:40,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:43:40,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:43:40,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:43:40,667 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 21:43:40,716 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:43:40,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:43:40,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:43:40,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:43:40,719 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:43:40,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:43:40,720 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:43:40,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:43:40,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:43:40,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:43:40,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:43:40,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:43:40,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:43:40,723 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:43:40,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:43:40,723 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:43:40,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:43:40,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:43:40,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:43:40,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:43:40,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:43:40,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:43:40,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:43:40,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:43:40,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:43:40,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:43:40,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:43:40,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:43:40,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:43:40,726 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 21:43:41,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:43:41,201 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:43:41,206 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:43:41,208 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:43:41,209 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:43:41,210 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label52.c [2020-09-24 21:43:41,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c21c8fe2/f0c4eec909cf493dad2b64deeab2d9ed/FLAG39d4b1820 [2020-09-24 21:43:41,962 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:43:41,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label52.c [2020-09-24 21:43:41,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c21c8fe2/f0c4eec909cf493dad2b64deeab2d9ed/FLAG39d4b1820 [2020-09-24 21:43:42,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c21c8fe2/f0c4eec909cf493dad2b64deeab2d9ed [2020-09-24 21:43:42,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:43:42,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:43:42,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:42,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:43:42,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:43:42,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:42" (1/1) ... [2020-09-24 21:43:42,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@207a8791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:42, skipping insertion in model container [2020-09-24 21:43:42,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:42" (1/1) ... [2020-09-24 21:43:42,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:43:42,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:42,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:42,979 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:43,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:43,096 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:43,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:43 WrapperNode [2020-09-24 21:43:43,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:43,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:43,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:43,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:43,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:43" (1/1) ... [2020-09-24 21:43:43,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:43" (1/1) ... [2020-09-24 21:43:43,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:43" (1/1) ... [2020-09-24 21:43:43,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:43" (1/1) ... [2020-09-24 21:43:43,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:43" (1/1) ... [2020-09-24 21:43:43,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:43" (1/1) ... [2020-09-24 21:43:43,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:43" (1/1) ... [2020-09-24 21:43:43,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:43,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:43,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:43,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:43,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:43" (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 21:43:43,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:43,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:43,288 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:43,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:44,633 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:44,633 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:44,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:44 BoogieIcfgContainer [2020-09-24 21:43:44,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:44,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:44,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:44,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:44,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:43:42" (1/3) ... [2020-09-24 21:43:44,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3808b195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:44, skipping insertion in model container [2020-09-24 21:43:44,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:43" (2/3) ... [2020-09-24 21:43:44,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3808b195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:44, skipping insertion in model container [2020-09-24 21:43:44,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:44" (3/3) ... [2020-09-24 21:43:44,658 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label52.c [2020-09-24 21:43:44,671 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:44,687 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:44,710 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:44,753 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:44,754 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:44,754 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:44,754 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:44,754 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:44,755 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:44,755 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:44,755 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-24 21:43:44,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:44,825 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] [2020-09-24 21:43:44,825 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:44,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:44,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1349342961, now seen corresponding path program 1 times [2020-09-24 21:43:44,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:44,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736173715] [2020-09-24 21:43:44,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:45,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:45,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:46,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:47,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:47,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:47,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:49,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:50,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:50,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-09-24 21:43:50,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:43:50,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-09-24 21:43:50,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:50,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:43:50,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:50,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:43:50,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:43:50,900 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-09-24 21:43:51,058 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-09-24 21:43:51,203 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2020-09-24 21:43:51,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:51,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:51,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:51,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:51,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:51,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-09-24 21:43:51,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:51,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:51,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:51,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:51,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:51,905 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 21:43:51,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736173715] [2020-09-24 21:43:51,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:43:51,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:43:51,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754836176] [2020-09-24 21:43:51,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:43:51,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:51,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:43:51,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:43:51,938 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:43:52,275 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-24 21:43:52,579 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-09-24 21:43:52,962 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 98 [2020-09-24 21:43:53,316 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2020-09-24 21:43:53,701 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-09-24 21:43:54,043 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-09-24 21:43:54,520 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2020-09-24 21:43:54,683 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-09-24 21:43:55,750 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-09-24 21:43:55,981 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2020-09-24 21:43:56,338 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-09-24 21:43:57,095 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2020-09-24 21:43:57,602 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2020-09-24 21:43:57,843 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-24 21:43:58,926 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:43:59,369 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-09-24 21:44:01,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:01,928 INFO L93 Difference]: Finished difference Result 1861 states and 2653 transitions. [2020-09-24 21:44:01,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:44:01,930 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 130 [2020-09-24 21:44:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:01,961 INFO L225 Difference]: With dead ends: 1861 [2020-09-24 21:44:01,961 INFO L226 Difference]: Without dead ends: 1232 [2020-09-24 21:44:01,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:44:01,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2020-09-24 21:44:02,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1070. [2020-09-24 21:44:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-09-24 21:44:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1288 transitions. [2020-09-24 21:44:02,107 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1288 transitions. Word has length 130 [2020-09-24 21:44:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:02,109 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1288 transitions. [2020-09-24 21:44:02,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:44:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1288 transitions. [2020-09-24 21:44:02,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-24 21:44:02,120 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:02,121 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] [2020-09-24 21:44:02,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:44:02,121 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:02,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:02,122 INFO L82 PathProgramCache]: Analyzing trace with hash -211856301, now seen corresponding path program 1 times [2020-09-24 21:44:02,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:02,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293834670] [2020-09-24 21:44:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:02,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:02,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:02,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:03,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:03,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:05,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:05,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:06,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:07,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:07,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:07,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-24 21:44:07,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:44:07,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-09-24 21:44:07,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:07,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:44:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:44:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:44:07,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:07,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:07,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:07,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:07,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:07,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:07,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 21:44:07,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:07,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:44:07,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:07,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:07,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:07,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:07,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:07,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:07,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:44:07,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:07,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 21:44:07,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:07,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:44:07,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:07,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:44:07,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:44:08,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293834670] [2020-09-24 21:44:08,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:08,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:44:08,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555694304] [2020-09-24 21:44:08,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:44:08,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:08,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:44:08,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:44:08,128 INFO L87 Difference]: Start difference. First operand 1070 states and 1288 transitions. Second operand 19 states. [2020-09-24 21:44:09,314 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-09-24 21:44:09,560 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-09-24 21:44:09,763 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-09-24 21:44:10,281 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-09-24 21:44:10,564 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:44:11,273 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:44:11,533 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-09-24 21:44:12,339 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-09-24 21:44:12,935 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-09-24 21:44:13,303 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-09-24 21:44:14,278 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-09-24 21:44:14,875 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-09-24 21:44:15,325 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-09-24 21:44:15,749 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-09-24 21:44:17,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:17,532 INFO L93 Difference]: Finished difference Result 4039 states and 5380 transitions. [2020-09-24 21:44:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-24 21:44:17,532 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 152 [2020-09-24 21:44:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:17,551 INFO L225 Difference]: With dead ends: 4039 [2020-09-24 21:44:17,552 INFO L226 Difference]: Without dead ends: 3049 [2020-09-24 21:44:17,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 21:44:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2020-09-24 21:44:17,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2832. [2020-09-24 21:44:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2020-09-24 21:44:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3406 transitions. [2020-09-24 21:44:17,674 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3406 transitions. Word has length 152 [2020-09-24 21:44:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:17,675 INFO L479 AbstractCegarLoop]: Abstraction has 2832 states and 3406 transitions. [2020-09-24 21:44:17,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:44:17,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3406 transitions. [2020-09-24 21:44:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-09-24 21:44:17,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:17,688 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] [2020-09-24 21:44:17,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:44:17,689 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:17,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1283678850, now seen corresponding path program 1 times [2020-09-24 21:44:17,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:17,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135747149] [2020-09-24 21:44:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:17,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:17,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:18,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:18,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:18,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:19,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:20,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:20,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:21,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:21,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:21,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:22,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:22,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-09-24 21:44:22,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:44:22,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-24 21:44:22,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:22,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:44:22,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:44:22,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:44:22,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:23,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:23,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:23,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:23,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:23,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:23,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:44:23,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:23,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:23,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:23,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:23,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:23,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:23,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:23,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:23,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:23,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:44:23,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:23,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 21:44:23,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:23,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:23,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:23,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:44:23,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:23,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:44:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:23,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:23,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:23,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:23,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:44:23,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:23,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-24 21:44:23,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:23,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:44:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:44:23,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:23,724 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 21:44:23,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135747149] [2020-09-24 21:44:23,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:23,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:44:23,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624611802] [2020-09-24 21:44:23,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:44:23,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:23,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:44:23,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:44:23,727 INFO L87 Difference]: Start difference. First operand 2832 states and 3406 transitions. Second operand 13 states. [2020-09-24 21:44:24,609 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-09-24 21:44:25,082 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-09-24 21:44:25,221 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-09-24 21:44:27,107 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-09-24 21:44:30,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:30,196 INFO L93 Difference]: Finished difference Result 8400 states and 11058 transitions. [2020-09-24 21:44:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:44:30,199 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 165 [2020-09-24 21:44:30,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:30,230 INFO L225 Difference]: With dead ends: 8400 [2020-09-24 21:44:30,230 INFO L226 Difference]: Without dead ends: 5293 [2020-09-24 21:44:30,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:44:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2020-09-24 21:44:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 4347. [2020-09-24 21:44:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4347 states. [2020-09-24 21:44:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 5302 transitions. [2020-09-24 21:44:30,391 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 5302 transitions. Word has length 165 [2020-09-24 21:44:30,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:30,392 INFO L479 AbstractCegarLoop]: Abstraction has 4347 states and 5302 transitions. [2020-09-24 21:44:30,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:44:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 5302 transitions. [2020-09-24 21:44:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-24 21:44:30,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:30,406 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:44:30,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:44:30,406 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:30,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:30,406 INFO L82 PathProgramCache]: Analyzing trace with hash -509114647, now seen corresponding path program 1 times [2020-09-24 21:44:30,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:30,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264783759] [2020-09-24 21:44:30,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:30,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:30,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:30,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:33,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking...