/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_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:40:46,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:40:46,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:40:46,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:40:46,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:40:46,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:40:46,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:40:46,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:40:46,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:40:46,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:40:46,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:40:46,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:40:46,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:40:46,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:40:46,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:40:46,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:40:46,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:40:46,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:40:46,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:40:46,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:40:46,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:40:46,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:40:46,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:40:46,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:40:46,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:40:46,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:40:46,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:40:46,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:40:46,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:40:46,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:40:46,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:40:46,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:40:46,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:40:46,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:40:46,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:40:46,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:40:46,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:40:46,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:40:46,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:40:46,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:40:46,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:40:46,724 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 21:40:46,767 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:40:46,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:40:46,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:40:46,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:40:46,769 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:40:46,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:40:46,770 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:40:46,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:40:46,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:40:46,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:40:46,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:40:46,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:40:46,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:40:46,773 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:40:46,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:40:46,773 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:40:46,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:40:46,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:40:46,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:40:46,774 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:40:46,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:40:46,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:40:46,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:40:46,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:40:46,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:40:46,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:40:46,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:40:46,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:40:46,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:40:46,776 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 21:40:47,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:40:47,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:40:47,242 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:40:47,245 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:40:47,245 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:40:47,246 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label00.c [2020-09-24 21:40:47,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0e3f7a1f/83fa559365734d329f0eff71b0858209/FLAG55aab6629 [2020-09-24 21:40:47,969 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:40:47,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label00.c [2020-09-24 21:40:47,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0e3f7a1f/83fa559365734d329f0eff71b0858209/FLAG55aab6629 [2020-09-24 21:40:48,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0e3f7a1f/83fa559365734d329f0eff71b0858209 [2020-09-24 21:40:48,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:40:48,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:40:48,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:48,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:40:48,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:40:48,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:48" (1/1) ... [2020-09-24 21:40:48,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b64216 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 21:40:48,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:48" (1/1) ... [2020-09-24 21:40:48,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:40:48,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:40:48,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:48,747 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:40:48,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:48,978 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:40:48,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:48 WrapperNode [2020-09-24 21:40:48,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:48,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:40:48,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:40:48,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:40:49,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:48" (1/1) ... [2020-09-24 21:40:49,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:48" (1/1) ... [2020-09-24 21:40:49,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:48" (1/1) ... [2020-09-24 21:40:49,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:48" (1/1) ... [2020-09-24 21:40:49,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:48" (1/1) ... [2020-09-24 21:40:49,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:48" (1/1) ... [2020-09-24 21:40:49,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:48" (1/1) ... [2020-09-24 21:40:49,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:40:49,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:40:49,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:40:49,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:40:49,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:48" (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 21:40:49,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:40:49,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:40:49,229 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:40:49,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:40:49,229 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:40:49,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:40:49,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:40:49,230 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:40:49,231 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:40:49,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:40:49,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:40:50,602 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:40:50,602 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:40:50,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:50 BoogieIcfgContainer [2020-09-24 21:40:50,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:40:50,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:40:50,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:40:50,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:40:50,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:40:48" (1/3) ... [2020-09-24 21:40:50,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c04c21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:50, skipping insertion in model container [2020-09-24 21:40:50,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:48" (2/3) ... [2020-09-24 21:40:50,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c04c21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:50, skipping insertion in model container [2020-09-24 21:40:50,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:50" (3/3) ... [2020-09-24 21:40:50,627 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label00.c [2020-09-24 21:40:50,644 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:40:50,670 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:40:50,693 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:40:50,735 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:40:50,735 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:40:50,735 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:40:50,736 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:40:50,736 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:40:50,736 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:40:50,736 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:40:50,736 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:40:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:40:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-09-24 21:40:50,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:50,792 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, 1, 1] [2020-09-24 21:40:50,792 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:50,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1323495626, now seen corresponding path program 1 times [2020-09-24 21:40:50,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:50,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346680907] [2020-09-24 21:40:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:51,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:51,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:52,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:52,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:54,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:55,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:55,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:56,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-24 21:40:56,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:40:56,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-09-24 21:40:56,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:56,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:40:56,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:40:56,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:40:56,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:40:56,854 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-09-24 21:40:56,990 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-09-24 21:40:57,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:57,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:57,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:57,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:40:57,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:57,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-24 21:40:57,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:57,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:40:57,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:57,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:40:57,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:57,814 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 21:40:57,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346680907] [2020-09-24 21:40:57,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:40:57,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-24 21:40:57,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687569338] [2020-09-24 21:40:57,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:40:57,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:40:57,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:40:57,852 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 17 states. [2020-09-24 21:40:58,298 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-09-24 21:40:58,542 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-09-24 21:40:58,861 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2020-09-24 21:40:59,247 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-09-24 21:40:59,596 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2020-09-24 21:41:00,111 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-09-24 21:41:00,427 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-09-24 21:41:00,567 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-24 21:41:01,050 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-09-24 21:41:02,227 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-09-24 21:41:02,518 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-09-24 21:41:02,749 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-09-24 21:41:03,119 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-09-24 21:41:03,979 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-09-24 21:41:04,557 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-09-24 21:41:04,763 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-24 21:41:05,808 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:41:06,272 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-09-24 21:41:08,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:08,974 INFO L93 Difference]: Finished difference Result 1861 states and 2653 transitions. [2020-09-24 21:41:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 21:41:08,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 141 [2020-09-24 21:41:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:09,005 INFO L225 Difference]: With dead ends: 1861 [2020-09-24 21:41:09,006 INFO L226 Difference]: Without dead ends: 1232 [2020-09-24 21:41:09,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 21:41:09,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2020-09-24 21:41:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1070. [2020-09-24 21:41:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-09-24 21:41:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1288 transitions. [2020-09-24 21:41:09,198 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1288 transitions. Word has length 141 [2020-09-24 21:41:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:09,199 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1288 transitions. [2020-09-24 21:41:09,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:41:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1288 transitions. [2020-09-24 21:41:09,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-24 21:41:09,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:09,210 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, 1, 1] [2020-09-24 21:41:09,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:41:09,211 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:09,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1648221656, now seen corresponding path program 1 times [2020-09-24 21:41:09,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:09,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774931510] [2020-09-24 21:41:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:09,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:09,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:09,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:09,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:09,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:10,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:10,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:11,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:12,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:14,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:14,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-09-24 21:41:14,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:41:14,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-09-24 21:41:14,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:14,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:41:14,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:14,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:41:14,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:14,895 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-09-24 21:41:15,018 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-09-24 21:41:15,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:15,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:15,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:15,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:15,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:15,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-24 21:41:15,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:15,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:15,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:15,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:15,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:15,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:15,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:15,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:15,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:15,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:41:15,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:15,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-24 21:41:15,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:15,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:15,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:15,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:41:15,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:16,005 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 21:41:16,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774931510] [2020-09-24 21:41:16,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:16,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:41:16,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471348866] [2020-09-24 21:41:16,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:41:16,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:16,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:41:16,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:41:16,014 INFO L87 Difference]: Start difference. First operand 1070 states and 1288 transitions. Second operand 20 states. [2020-09-24 21:41:16,591 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-09-24 21:41:16,824 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-09-24 21:41:17,129 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-09-24 21:41:17,633 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-09-24 21:41:18,003 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-09-24 21:41:19,437 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-09-24 21:41:19,826 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-09-24 21:41:20,093 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 21:41:20,430 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-09-24 21:41:21,187 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-09-24 21:41:21,427 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-24 21:41:22,392 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-09-24 21:41:22,831 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-24 21:41:23,682 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-09-24 21:41:24,679 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 21:41:25,601 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-09-24 21:41:25,834 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-24 21:41:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:28,142 INFO L93 Difference]: Finished difference Result 4470 states and 6098 transitions. [2020-09-24 21:41:28,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-24 21:41:28,146 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 163 [2020-09-24 21:41:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:28,182 INFO L225 Difference]: With dead ends: 4470 [2020-09-24 21:41:28,183 INFO L226 Difference]: Without dead ends: 3480 [2020-09-24 21:41:28,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=923, Invalid=2499, Unknown=0, NotChecked=0, Total=3422 [2020-09-24 21:41:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2020-09-24 21:41:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3403. [2020-09-24 21:41:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3403 states. [2020-09-24 21:41:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 4127 transitions. [2020-09-24 21:41:28,331 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 4127 transitions. Word has length 163 [2020-09-24 21:41:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:28,332 INFO L479 AbstractCegarLoop]: Abstraction has 3403 states and 4127 transitions. [2020-09-24 21:41:28,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:41:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 4127 transitions. [2020-09-24 21:41:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-24 21:41:28,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:28,348 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, 1, 1] [2020-09-24 21:41:28,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:41:28,349 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:28,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1937506275, now seen corresponding path program 1 times [2020-09-24 21:41:28,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:28,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063163203] [2020-09-24 21:41:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:28,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:28,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:28,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:28,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:31,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:31,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:32,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:33,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:33,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:33,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:33,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:33,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-09-24 21:41:33,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:41:33,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-09-24 21:41:33,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:41:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:41:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:41:33,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:33,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:33,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:33,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:33,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:33,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:33,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 21:41:33,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:33,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:33,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:33,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:33,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:33,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:33,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:33,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:33,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:33,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:41:33,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:33,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-24 21:41:33,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:33,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:33,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:33,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:41:33,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:41:33,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:41:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:33,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:34,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:41:34,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:34,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-24 21:41:34,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:34,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:41:34,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:41:34,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063163203] [2020-09-24 21:41:34,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:34,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:41:34,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512096882] [2020-09-24 21:41:34,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:41:34,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:34,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:41:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:41:34,463 INFO L87 Difference]: Start difference. First operand 3403 states and 4127 transitions. Second operand 12 states. [2020-09-24 21:41:40,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:40,073 INFO L93 Difference]: Finished difference Result 9424 states and 12350 transitions. [2020-09-24 21:41:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 21:41:40,074 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 176 [2020-09-24 21:41:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:40,108 INFO L225 Difference]: With dead ends: 9424 [2020-09-24 21:41:40,108 INFO L226 Difference]: Without dead ends: 5751 [2020-09-24 21:41:40,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-09-24 21:41:40,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2020-09-24 21:41:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 5114. [2020-09-24 21:41:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5114 states. [2020-09-24 21:41:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 6348 transitions. [2020-09-24 21:41:40,281 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 6348 transitions. Word has length 176 [2020-09-24 21:41:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:40,282 INFO L479 AbstractCegarLoop]: Abstraction has 5114 states and 6348 transitions. [2020-09-24 21:41:40,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:41:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 6348 transitions. [2020-09-24 21:41:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-24 21:41:40,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:40,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:40,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:41:40,301 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1495427630, now seen corresponding path program 1 times [2020-09-24 21:41:40,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:40,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863815719] [2020-09-24 21:41:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:40,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:40,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:40,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking...